Koichi Ishida
© Koichi Ishida
Scientist
NameMr Dr. Koichi Ishida
Beyond Moore Circuit Design
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Chair for Circuit Design and Network Theory
Visitor address:
Barkhausenbau, Room: 132 Helmholtzstraße 18
01069 Dresden
Curriculum Vitae
Koichi Ishida received the B.S. degree in electronics engineering from the University of Electro-Communications, Tokyo, Japan, in 1998, and received the M.S. and Ph.D. degrees in electronics engineering from the University of Tokyo, Tokyo, Japan, in 2002 and 2005, respectively. He joined Nippon Avionics Co., Ltd. Yokohama, Japan in 1989, where he developed high-reliability hybrid microcircuits for aerospace programs. From 2006 to 2007, he worked for CMOS analog and RF circuits as an Assistant Professor at Tokyo Institute of Technology, Yokohama, Japan. From 2007 to 2012, he worked for on-chip power supply circuits and organic electronics circuits at the Institute of Industrial Science, the University of Tokyo, Tokyo, Japan. Since July 2012, he has been working at Chair for Circuit Design and Network Theory, Dresden University of Technology, Dresden, Germany. His research interests include low-voltage low-power CMOS analog circuits, on-chip power supply circuits, and large-area flexible electronics. He is a member of IEEE and IEICE.
Publications
Book Chapters
[4] K. Ishida, H. Fuketa, T. Sekitani, M. Takamiya, H. Toshiyoshi, T. Someya, and T. Sakurai, "Improvement and Applications of Large-Area Flexible Electronics with Organic Transistors," Tomasz Wojcicki (Editor) VLSI: Circuits for Emerging Applications, pp. 95-109, Boca Raton: CRC Press, ISBN 9781466599093, Nov. 2014.
[3] M. Takamiya, K. Ishida, T. Sekitani, T. Someya, and T. Sakurai, "Organic Integrated Circuits for EMI Measurement," T. Someya (Ed.) Stretchable Electronics, pp. 431-448, Weinheim: Wiley-VCH, ISBN 978-3527329786, Feb. 2013.
[2] M. Takamiya, T. Sekitani, K. Ishida, T. Someya, and T. Sakurai, "Large Area Electronics with Organic Transistors," Eugenio Cantatore (ed.) Applications of Organic and Printed Electronics, Integrated Circuits and Systems, pp.101-113, New York: Springer, 2012.
[1] M. Takamiya, K. Onizuka, K. Ishida, and T. Sakurai, "DC-DC Converter Technologies for On-Chip Distributed Power Supply Systems-3D Stacking and Hybrid Operation," Amara Amara, Thomas Ea, Marc Belleville (Eds.) Lecture Notes in Electrical Engineering Vol.66, Emerging Technologies and Circuits, pp.221-247, New York: Springer, 2010.
Journal Papers
[43] F. Catania, N. Saeedzadeh Khaanghah, D. Corsino, H. D. S. Oliveira, A. Carrasco-Pena, K. Ishida, T. Meister, F. Ellinger, G. Cantarella, and N. Munzenrieder, "AC Performance Tunability of Flexible Bottom-Gate InGaZnO TFTs by an Additional Top-Gate Contact," IEEE Transactions on Electron Devices, Vol. 70, No. 12, pp. 6359-6363, Dec. 2023.
[42] Tilo Meister, Koichi Ishida, Corrado Carta, Niko Münzenrieder, and Frank Ellinger, "Flexible Electronics for Wireless Communication: A Technology and Circuit Design Review With an Application Example," IEEE Microwave Magazine, Vo. 23, No. 4, pp. 24 - 44, Apr. 2022.
[41] D. Corsino, F. Catania, K. Ishida, T. Meister, F. Ellinger, G. Cantarella, and N. Münzenrieder, "Monolithic Integration, Performance, and Comparison of Self-Aligned and Conventional IGZO Thin-Film Transistors on a Flexible Substrate," IEEE Journal on Flexible Electronics. Vol. 1, No. 3, pp. 159-166, July 2022.
[40] G. Cantarella, J. Costa, T. Meister, K. Ishida, C. Carta, F. Ellinger, P. Lugli, N. Münzenrieder, and L. Petti, "Review of recent trends in flexible metal oxide thin-film transistors for analog applications," Flexible and Printed Electronics, Vol. 5, No.3, Aug. 2020.
[39] T. Meister, K Ishida, A. Sou, C. Carta, and F. Ellinger, "3.93 MHz / 328 μW Dynamic Frequency Divider in Flexible a-IGZO TFT Technology," IEEE Solid-State Circuits Letters, vol. 3, pp. 134-137, July 2020.
[38] T. Meister, K. Ishida, A. Sou, C. Carta, and F. Ellinger, "49.35 MHz GBW and 33.43 MHz GBW amplifiers in flexible a-IGZO TFT technology," Electronics Letters, Vol. 56 No. 15 pp. 782–785, July 2020.
[37 N. Münzenrieder, I. Shorubalko, L. Petti, G. Cantarella, B. Shkodra, T. Meister, K. Ishida, C. Carta, F. Ellinger, and Gerhard Tröster, "Focused ion beam milling for the fabrication of 160 nm channel length IGZO TFTs on flexible polymer substrates," Flexible and Printed Electronics, Vol 5, No.1, Jan. 2020.
[36] Tilo Meister, Koichi Ishida, Stefan Knobelspies, Giuseppe Cantarella, Niko Münzenrieder, Gerhard Tröster, Corrado Carta, and Frank Ellinger, “5–31-Hz 188-μW Light-Sensing Oscillator With Two Active Inductors Fully Integrated on Plastic,” IEEE Journal of Solid-State Circuits, Vol. 54, No. 8, pp. 2195 – 2206, Aug. 2019.
[35] Niko Münzenrieder, Koichi Ishida, Tilo Meister, Giuseppe Cantarella, Luisa Petti, Corrado Carta, Frank Ellinger, and Gerhard Tröster, "Flexible InGaZnO TFTs With fmax Above 300 MHz," IEEE Electron Device Letters, Vol. 39, No. 9, pp. 1310 - 1313, Sep. 2018.
[34] Giuseppe Cantarella, Koichi Ishida, Luisa Petti, Niko Münzenrieder, Tilo Meister, Reza Shabanpour, Corrado Carta, Frank Ellinger, Gerhard Tröster, and Giovanni Antonio Salvatore, "Flexible In-Ga-Zn-O based circuits with two and three metal layers: Simulation and Fabrication study," IEEE Electron Device Letters, Vol. 37, No. 12, pp. 1582-1585, DOI: 10.1109/LED.2016.2619738, Dec. 2016.
[33] Bahman Kheradmand-Boroujeni, Georg C. Schmidt, Daniel Höft, Katherina Haase, Maxi Bellmann, Koichi Ishida, Reza Shabanpour, Tilo Meister, Corrado Carta, Arved C. Hübler, Frank Ellinger, "Small-signal characteristics of fully-printed high-current flexible all-polymer three-layer-dielectric transistors," Elsevier Organic Electronics, Vol. 34, pp. 267-275, doi:10.1016/j.orgel.2016.04.037, July 2016.
[32] Bahman Kheradmand-Boroujeni, Georg Cornelius Schmidt, Daniel Höft, Maxi Bellmann, Katherina Haase. Koichi Ishida, Reza Shabanpour, Tilo Meister, Corrado Carta, Pol Ghesquiere, Arved C. Hübler, Frank Ellinger, "A Fully-Printed Self-Biased Polymeric Audio Amplifier for Driving Fully-Printed Piezoelectric Loudspeakers," IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 63, No. 6, pp. 785 - 794, DOI: 10.1109/TCSI.2016.2538060, June 2016.
[31] R. Shabanpour, T. Meister, K. Ishida, B. K. Boroujeni, C. Carta, F. Ellinger, L. Petti, N. Münzenrieder, G. A. Salvatore, and G. Tröster, "Design and analysis of high-gain amplifiers in flexible self-aligned a-IGZO thin-film transistor technology," Analog Integrated Circuits and Signal Processing, vol. 87, pp. 213-222, Springer, DOI 10.1007/s10470-015-0655-3, Oct. 2015.
[30] S. Iguchi, P. Yeon, H. Fuketa, K. Ishida, T. Sakurai, and M. Takamiya, "Wireless Power Transfer with Zero-Phase-Difference Capacitance Control," IEEE Transactions on Circuits and Systems‒I, Vol. 62, No. 4, pp. 938-947, Apr. 2015.
[29] Hiroshi Fuketa, Kazuaki Yoshioka, Yasuhiro Shinozuka, Koichi Ishida, Tomoyuki Yokota, Naoji Matsuhisa, Yusuke Inoue, Masaki Sekino, Tsuyoshi Sekitani, Makoto Takamiya, Takao Someya, and Takayasu Sakurai "1 µm-Thickness Ultra-Flexible and High Electrode-Density Surface Electromyogram Measurement Sheet With 2 V Organic Transistors for Prosthetic Hand Control," IEEE Transactions on Biomedical Circuits and Systems, Vol. 8, No. 6, pp. 824 - 833, DOI: 10.1109/TBCAS.2014.2314135, Dec. 2014.
[28] Xin Zhang, Po-Hung Chen, Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Kazunori Watanabe, Takayasu Sakurai, Makoto Takamiya, "A 0.6 V Input CCM/DCM Operating Digital Buck Converter in 40 nm CMOS," IEEE Journal of Solid-State Circuits, Vol. 49, No. 11, pp. 2377 - 2386, DOI: 10.1109/JSSC.2014.2339325, Nov. 2014.
[27] H. Fuketa, Y. Shinozuka, K. Ishida, M. Takamiya, T. Fujii, H. Shimizu, K. Kobayashi, T. Sato, and T. Sakurai, "Efficiency Increase in On-Chip Buck Converter by Introduction of High Permeability Material to Inductor on Interposer," Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 61, No. S1, pp. S340-S342, May 2014.
[26] Bahman Kheradmand-Boroujeni, Georg Cornelius Schmidt, Daniel Höft, Reza Shabanpour, Charles Perumal, Tilo Meister, Koichi Ishida, Corrado Carta, Arved C. Hübler, and Frank Ellinger, "Analog Characteristics of Fully Printed Flexible Organic Transistors Fabricated With Low-Cost Mass-Printing Techniques," IEEE Transactions on Electron Devices, Vol. 61, No. 5, pp. 1423-1430, May 2014.
[25] Koichi Takemura, Koichi Ishida, Yasuhiro Ishii, Katsumi Maeda, Makoto Takamiya, Takayasu Sakurai, and Kazuhiro Baba, "Si Interposers with 15-um-thick Spiral Inductors and SrTiO3 Thin Film Capacitors for Novel 3D Stacked Buck Converters," Transactions of The Japan Institute of Electronics Packaging, Vol. 6, No. 1, pp. 78-86, DOI: 10.5104/jiepeng.6.78, Dec. 2013.
[24] C. Perumal, K. Ishida, R. Shabanpour, B. K. Boroujeni, L. Petti, N. S. Münzenrieder, G. A. Salvatore, C. Carta, G. Tröster, and F. Ellinger, "A Compact a-IGZO TFT Model Based on MOSFET SPICE Level = 3 Template for Analog/RF Circuit Designs," IEEE Electron Device Letters, Vol. 34, No. 11, pp. 1391-1393, DOI: 10.1109/LED.2013.2279940, Nov. 2013.
[23] Koichi Ishida, Tsung-Ching Huang, Kentaro Honda, Yasuhiro Shinozuka, Hiroshi Fuketa, Tomoyuki Yokota, Ute Zschieschang, Hagen Klauk, Gregory Tortissier, Tsuyoshi Sekitani, Makoto Takamiya, Hiroshi Toshiyoshi, Takao Someya, and Takayasu Sakurai, "Insole Pedometer With Piezoelectric Energy Harvester and 2V Organic Circuits," IEEE Journal of Solid-State Circuits, Vol. 48, No. 1, pp. 255-264, DOI: 10.1109/JSSC.2012.2221253, Jan. 2013.
[22] K. Mori, H. Lim, S. Iguchi, K. Ishida, M. Takamiya, and T. Sakurai, “Positioning-Free Resonant Wireless Power Transmission Sheet With Staggered Repeater Coil Array (SRCA),” IEEE Antennas and Wireless Propagation Letters, Vol. 11, pp. 1710-1713, Dec. 2012. (Invited)
[21] Po-Hung Chen, Xin Zhang, Koichi Ishida, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, and Takayasu Sakurai, "An 80 mV Startup Dual-Mode Boost Converter by Charge-Pumped Pulse Generator and Threshold Voltage Tuned Oscillator with Hot Carrier Injection," IEEE Journal of Solid-State Circuits, Vol.47, No.11, pp. 2554-2562, DOI: 10.1109/JSSC.2012.2210953, Nov. 2012.
[20] X. Zhang, K. Ishida, H. Fuketa, M. Takamiya, and T. Sakurai, "On-Chip Measurement System for Within-Die Delay Variation of Individual Standard Cells in 65-nm CMOS," IEEE Transactions on Very Large Scale Integration (VLSI) Systems, Vol. 20, No. 10, pp. 1876-1880, DOI: 10.1109/TVLSI.2011.2162257, Oct. 2012.
[19] Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Kazunori Watanabe, Takayasu Sakurai, and Makoto Takamiya "A 1-V Input Switched-Capacitor Voltage Converter with Voltage-Reference-Free Pulse Density Modulation," IEEE Transaction on Circuits and Systems-II: Express Briefs, Vol. 59, No.6, pp. 361-365, DOI: 10.1109/TCSII.2012.2195056, Jun. 2012.
[18] Naoki Masunaga, Koichi Ishida, Takayasu Sakurai, and Makoto Takamiya, "EMI Camera LSI (EMcam) with On-Chip Loop Antenna Matrix to Measure EMI Noise Spectrum and Distribution," IEICE Transaction on Electronics, Vol.E95-C, No.6, pp.1059-1066, Jun. 2012.
[17] Po-Hung Chen, Koichi Ishida, Katsuyuki Ikeuchi, Xin Zhang, Kentaro Honda, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, and Takayasu Sakurai, "Startup Techniques for 95-mV Step-up Converter by Capacitor Pass-on Scheme and VTH-Tuned Oscillator with Fixed Charge Programming," IEEE Journal of Solid-State Circuits, Vol. 47, No. 5, pp.1252-1260, DOI: 10.1109/JSSC.2012.2185589, May 2012.
[16] Koichi Ishida, Tsung-Ching Huang, Kentaro Honda, Tsuyoshi Sekitani, Hiroyoshi Nakajima, Hiroki Maeda, Makoto Takamiya, Takao Someya, and Takayasu Sakurai, "A 100V AC Energy Meter Integrating 20V Organic CMOS Digital and Analog Circuits with a Floating Gate for Process Variation Compensation and a 100V Organic PMOS Rectifier," IEEE Journal of Solid-State Circuits, Vol.47, No.1, pp.301-309, Jan. 2012.
[15] Koichi Ishida, Tadashi Yasufuku, Shinji Miyamoto, Hiroto Nakai, Makoto Takamiya, Takayasu Sakurai, and Ken Takeuchi, "1.8V Low-Transient-Energy Adaptive Program-Voltage Generator Based on Boost Converter for 3D-Integrated NAND Flash SSD," IEEE Journal of Solid-State Circuits, Vol.46, No.6, pp.1478-1487, June 2011.
[14] Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Takayasu Sakurai, and Makoto Takamiya, "A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage," IEICE Transaction on Electronics, E94-C, No.6, pp.953-959, June 2011.
[13] Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Xin Zhang, Po-Hung Chen, Kazunori Watanabe, Makoto Takamiya, and Takayasu Sakurai, "0.5-V Input Digital Low-Dropout Regulator (LDO) with 98.7% Current Efficiency in 65nm CMOS," IEICE Transaction on Electronics, E94-C, No.6, pp.938-944, June 2011.
[12] Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, and Takayasu Sakurai, "0.18-V Input Charge Pump with Forward Body Bias to Startup Boost Converter for Energy Harvesting Applications," IEICE Transaction on Electronics, E94-C, No.4, pp.598-604, Apr. 2011.
[11] Koh Johguchi, Teruyoshi Hatanaka, Koichi Ishida, Tadashi Yasufuku, Makoto Takamiya, Takayasu Sakurai, and Ken Takeuchi, "Through-Silicon-Via (TSV) design for a 3D-Solid-State-Drive (SSD) System with Boost Converter in a Package," IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol.1, No.2, pp.268-276, Feb. 2011.
[10] K. Ishida, N. Masunaga, R. Takahashi, T. Sekitani, S. Shino, U. Zschieschang, H. Klauk, M. Takamiya, T. Someya, and T. Sakurai, "User Customizable Logic Paper (UCLP) with Sea-of Transmission-Gates (SOTG) of 2-V Organic CMOS and Ink-Jet Printed Interconnects," IEEE Journal of Solid-State Circuits, Vol.46, No.1, pp.285-292, Jan. 2011.
[9] Tsuyoshi Sekitani, Koichi Ishida, Ute Zschieschang, Hagen Klauk, Makoto Takamiya, Takayasu Sakurai, and Takao Someya "Large-area stretchable sensors with integrating organic CMOS ICs with Si-CMOS LSIs," Proceedeings of SPIE, Organic Semiconductors in Sensors and Bioelectronics III, Vol. 7779, pp. 77908-1 - 14, DOI:10.1117/12.861019, Sep. 2010.
[8] T. Yasufuku, T. Niiyama, Z. Piao, K. Ishida, M. Murakata, M. Takamiya, and T. Sakurai, "Difficulty of Power Supply Voltage Scaling in Large Scale Subthreshold Logic Circuits ,"IEICE Transaction on Electronics, E93-C, No.3, pp.332-339, Mar. 2010.
[7] T. Yasufuku, K. Ishida, S. Miyamoto, H. Nakai, M. Takamiya, and T. Sakurai, "Inductor and TSV Design of 20-V Boost Converter for Low Power 3D Solid State Drive with NAND Flash Memories ,"IEICE Transaction on Electronics, E93-C, No.3, pp.317-323, Mar. 2010.
[6] K. Ishida, N. Masunaga, Z. Zhou, T. Yasufuku, T. Sekitani, U. Zschieschang, H. Klauk, M. Takamiya, T. Someya, and T. Sakurai, "Stretchable EMI Measurement Sheet with 8×8 Coil Array, 2V Organic CMOS Decoder, and 0.18μm Silicon CMOS LSIs for Electric and Magnetic Field Detection," IEEE Journal of Solid-State Circuits, Vol.45, No.1, pp.249-259, Jan. 2010.
[5] Sanghoon Hwang, Hyunsik Im, Minkyu Song, Koichi Ishida, Toshiro Hiramoto, and Takayasu Sakurai, "Velocity Saturation Effects in a Short Channel Si-MOSFET and its Small Signal Characteristics," Journal of the Korean Physical Society, Vol.55, No.2, pp.581-584, Aug. 2009.
[4] L. Liu, Y. Miyamoto, Z. Zhou, K. Sakaida, J. Ryu, K. Ishida, M. takamiya, T. sakurai, "A 100 Mbps, 4.1 pJ/bit Threshold Detection-Based Impulse Radio UWB Transceiver in 90 nm CMOS," IEICE Transaction on Electronics, vol.E92-C, no.6, pp.769-776, June 2009.
[3] K. Ishida, A. Tamtrakarn, H. Ishikuro, M. Takamiya, and T. Sakurai, "An Outside-Rail Opamp Design Relaxing Low-Voltage Constraint on Future Scaled Transistors," IEICE Transaction on Electronics, vol.E90-C, no.4, pp.786-792, Apr. 2007.
[2] K. Ishida, K. Kanda, A. Tamtrakarn, H. Kawaguchi, and T. Sakurai, "Managing Subthreshold Leakage in Charge-Based Analog Circuits with Low-VTH Transistors by Analog T- Switch (AT-Switch) and Super Cut-off CMOS," IEEE Journal of Solid-State Circuits, vol.41, no.4, pp.859-867, Apr. 2006.
[1] K. Ishida and M. Fujishima, "Chopper-Stabilized High-Pass Sigma Delta Modulator Utilizing a Resonator Structure," IEEE Transaction on Circuits and Systems-II: Analog and Digital Signal Processing, vol.50, no.9, pp.627-631, Sep. 2003.
International Conferences
[87] G. Cantarella, N. Münzenrieder, L. Petti, K. Ishida, T. Meister, C. Carta, F. Ellinger, R. Hopf, "Mechanical and Electrical Design Strategies for Flexible InGaZnO Circuits," 28th International Conference on Mixed Design of Integrated Circuits and System (MIXDES) 2021, pp. 41-44, Lodz, Poland, 24-26 June 2021.
[86] N. Münzenrieder, L. Petti, G. Cantarella, J. Costa, T. Meister, K. Ishida, C. Carta, and F. Ellinger, "Tools and strategies to optimize the electrical and mechanical properties of flexible IGZO TFTs," 11th International Conference on Computer Aided Design for Thin-Film Transistor Technologies (IEEE CAD-TFT), Nov. 2020.
[85] N. Münzenrieder, J. Costa, L. Petti, G. Cantarella, T. Meister, K. Ishida, C. Carta, and F. Ellinger, “Design of bendable high-frequency circuits based on short-channel InGaZnO TFTs,” 2019 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS), pp. 1-3, 2019.
[84] F. Ellinger, C. Tzschoppe, D. Fritsche, P. Stärke, K. Ishida and T. Meister, ‘Review of Fast, Efficient and Flexible Radio-Frequency Integrated Frontends for the Wireless Communication Systems of the Future’, IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (IEEE-APWC), Cartagena de Indias, Colombia, 10-14 September, 2018
[83] F. Ellinger; K. Ishida, T. Meister, B.K. Boroujeni, M. Barahona, C. Carta, N. Münzenrieder, S. Knobelspies, G.A. Salvatore, G. Schmidt, and A.C. Hübler, "Bendable Printed and Thin-film Electronics for Wireless Communications", Second URSI Atlantic Radio Science Meeting - 2018 (URSI AT-RASC), Gran Canaria, 28 May – 1 June 2018, 2018.
[82] Tilo Meister, Frank Ellinger, Johann W. Bartha, Manfred Berroth, Joachim Burghartz, Martin Claus, Lothar Frey, Alessio Gagliardi, Marius Grundmann, Jan Hesselbarth, Hagen Klauk, Karl Leo, Paolo Lugli, Stefan Mannsfeld, Yiannos Manoli, Renato Negra, Daniel Neumaier, Ullrich Pfeiffer, Thomas Riedl, Susanne Scheinert, Ullrich Scherf, Andreas Thiede, Gerhard Tröster, Martin Vossiek, Robert Weigel, Christian Wenger, Golzar Alavi, Markus Becherer, Carlos Alvarado Chavarin, Mohammed Darwish, Martin Ellinger, Chun-Yu Fan, Martin Fritsch, Frank Grotjahn, Marco Gunia, Katherina Haase, Philipp Hillger, Koichi Ishida, Michael Jank, Stefan Knobelspies, Matthias Kuhl, Grzegorz Lupina, Shabnam Mohammadi Naghadeh, Niko Münzenrieder, Sefa Özbek, Mahsa Rasteh, Giovanni A. Salvatore, Daniel Schrüfer, Carsten Strobel, Manuel Theisen, Christian Tückmantel, Holger von Wenckstern, Zhenxing Wang, Zhipeng Zhang, "Program FFlexCom - High Frequency Flexible Bendable Electronics for Wireless Communication Systems," IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) 2017, Tel Aviv, Israel, pp. 1-6, 13-15, Nov. 2017.
[81] K. Ishida, T. Meister, S. Knobelspies, N. Münzenrieder, G. Cantarella, G. A. Salvatore, G. Tröster, C. Carta, and F. Ellinger, "3-5 V, 3-3.8 MHz OOK Modulator with a-IGZO TFTs for Flexible Wireless Transmitter," IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) 2017, Tel Aviv, Israel, pp. 1-4, 13-15, Nov. 2017.
[80] R. Shabanpour, T. Meister, K. Ishida, B. Boroujeni, L. Petti, N. Münzenrieder, G. Salvatore, G. Tröster, C. Carta, and F. Ellinger, "A Transistor Model for a-IGZO TFT Circuit Design Built upon the RPI-aTFT Model," 2017 IEEE International NEW Circuits And Systems Conference (NEWCAS), Strasbourg, France, pp. 129 - 132, 25 - 28 June, 2017.
[79] Tilo Meister, Koichi Ishida, Reza Shabanpour, Bahman K. Boroujeni, Corrado Carta, Niko Münzenrieder, Luisa Petti, Giuseppe Cantarella, Giovanni A. Salvatore, Gerhard Tröster, and Frank Ellinger, "20.3dB 0.39mW AM detector with single-transistor active inductor in bendable a-IGZO TFT," 2016 46th European Solid-State Circuits Conference (ESSCIRC), Lausanne, Switzerland, pp. 71 - 74, 12-15 Sept. 2016.
[78] K. Ishida, T. Meister, R. Shabanpour, B. K. Boroujeni, C. Carta, G. Cantarella, L. Petti, N. Münzenrieder, G. A. Salvatore, G. Tröster, and F. Ellinger, "Radio Frequency Electronics in a-IGZO TFT Technology," The 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD16), Kyoto, Japan, pp. 273-276, 6-8 July 2016. (Invited)
[77] T. Meister, K. Ishida, C. Carta, R. Shabanpour, B. K.-Boroujeni, N. Münzenrieder, L. Petti, G.A. Salvatore, G. Schmidt, P. Ghesquiere, S. Kiefl, G. De Toma, T. Faetti, A.C. Hübler, G. Tröster, and F. Ellinger, "3.5mW 1MHz AM Detector and Digitally-Controlled Tuner in a-IGZO TFT for Wireless Communications in a Fully Integrated Flexible System for Audio Bag," 2016 Symposium on VLSI Circuits, Honolulu, Hawaii, USA, pp. C134 - C155, 13-17 June 2016.
[76] A.K.M. Mahfuzul Islam, Hiroshi Fuketa, Koichi Ishida, Tomoyuki Yokota, Tsuyoshi Sekitani, Makoto Takamiya, Takao Someya, and Takayasu Sakurai, "Sensor and Circuit Solutions for Organic Flexible," SID Symposium Digest of Technical Papers, Vol 47, No. 1, pp. 629–632, San Francisco, CA, 22-27 May 2016. (Invited)
[75] R. Shabanpour, C. Carta, K. Ishida, T. Meister, B. Kheradmand-Boroujeni, N. Münzenrieder, L. Petti, G. A. Salvatore, G. Tröster, and F. Ellinger, "Baseband Amplifiers in a-IGZO TFT Technology for Flexible Audio Systems," 2015 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Bali, Indonesia, pp. 357-361, 9-12 Nov. 2015.
[74] T. Meister, K. Ishida, R. Shabanpour, B. Kheradmand-Boroujeni, C. Carta, and F. Ellinger, "Textile Loop Antenna and TFT Channel-Select Circuit for Fully Bendable TFT Receivers," SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, Porto de Galinhas, Pernambuco, Brazil, pp. 1-5, Nov. 2015.
[73] F. Ellinger, K. Ishida, R. Shabanpour, T. Meister, B. K. Boroujeni, C. Carta, L. Petti, N. Münzenrieder, G. A. Salvatore, and G. Tröster, "Radio Frequency Electronics on Plastic - Revolution by Flexible Solution," SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, Porto de Galinhas, Pernambuco, Brazil, pp. 1-5, Nov. 2015.
[72] K. Ishida, R. Shabanpour, T. Meister, B. K. Boroujeni, C. Carta, L. Petti, N. Münzenrieder, G. A. Salvatore, G. Tröster, and F. Ellinger, "20 MHz Carrier Frequency AM Receiver in Flexible a-IGZO TFT Technology with Textile Antennas," 2015 IEEE International Symposium on Radio-Frequency Integration Technology, Sendai, Japan, pp. 142-144, Aug. 2015. (Invited)
[71] R. Shabanpour, C. Carta, T. Meister , K. Ishida, B. Kherdmand-Boroujeni, N. Münzenrieder, G. Salvatore, L. Petti, G. Tröster, and F. Ellinger, "A Fully Integrated Audio Amplifier in Flexible a-IGZO TFT Technology for Printed Piezoelectric Loudspeakers," European conference on circuit theory and design, Trondheim, Norway, pp. 1-4, 24-26 Aug. 2015.
[70] Tilo Meister, Koich Ishida, Reza Shabanpour, Bahman K. Boroujeni, Corrado Carta, Niko S. Münzenrieder, Luisa Petti, Giovanni A. Salvatore, Gerhard Tröster, Michael Wagner, Pol Ghesquiere, Stefan Kiefl, Martin Krebs, and Frank Ellinger, "Bendable Energy-Harvesting Module with Organic Photovoltaic, Rechargeable Battery, and a-IGZO TFT Charging Electronics," European conference on circuit theory and design, Trondheim, Norway, pp. 1-4, 24-26 Aug. 2015.
[69] R. Shabanpour, K. Ishida, T. Meister, N. Münzenrieder, L. Petti, G. Salvatore, B. Kheradmand-Boroujeni, C. Carta, G. Tröster, and F. Ellinger, "A 70°Phase Margin Differential OPAMP with Positive Feedback in Flexible a-IGZO TFT Technology," International Midwest Symposium on Circuits and Systems, Fort Collins, CO, USA, pp. 1-4, 2-5 Aug., 2015.
[68] K. Ishida, R. Shabanpour, T. Meister, B. K. Boroujeni, C. Carta, L. Petti, N. Münzenrieder, G. A. Salvatore, G. Tröster, and F. Ellinger, "15 dB Conversion Gain, 20 MHz Carrier Frequency AM Receiver in Flexible a-IGZO TFT Technology with Textile Antennas," 2015 Symposium on VLSI Circuits, Kyoto, Japan, pp. C194 - C195, 15-19 June 2015.
[67] R. Shabanpour, T. Meister, K. Ishida, L. Petti, N. Münzenrieder, G. A. Salvatore, B. K. Boroujeni, C. Carta, G. Tröster, and F. Ellinger, High Gain Amplifiers in Flexible Self-Aligned a-IGZO Thin-Film-Transistor Technology, IEEE International Conference on Electronics Circuits & Systems , Marseille, France, 7-10 Dec. 2014.
[66] R. Shabanpour, T. Meister, K. Ishida, L. Petti, N. Münzenrieder, G. A. Salvatore, B. K. Boroujeni, C. Carta, U. Jörges, G. Tröster and F. Ellinger, "Cherry-Hooper Amplifiers with 33 dB Gain at 400 kHz BW and 10 dB Gain at 3.5 MHz BW in Flexible Self-Aligned a-IGZO TFT Technology," IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Kuching, Sarawak, Malaysia, 1-4 December, 2014
[65] K. Ishida , R. Shabanpour, B. K. Boroujeni, T. Meister, L. Petti, N. S. Münzenrieder, G. A. Salvatore, C. Carta, G. Tröster, and F. Ellinger, 22.5 dB Open-Loop Gain, 31 kHz GBW Pseudo-CMOS Based Operational Amplifier with a-IGZO TFTs on a Flexible Film, IEEE Asian Solid-State Circuits Conference, Kaohsiung, Taiwan, pp. 313-316, 10-12 Nov. 2014.
[64] M. Takamiya, H. Fuketa, K. Ishida, T. Yokota, T. Sekitani, T. Someya, and T. Sakurai, "Flexible, Large-Area, and Distributed Organic Electronics Closely Contacted with Skin for Healthcare Applications," IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), College Station, USA, pp. 829-832, Aug. 2014. (Invited)
[63] H. Fuketa, Y. Shinozuka, K. Ishida, M Takamiya, and T. Sakurai, "On-Chip Buck Converter with Spiral Ferrite Inductor and Reducing IR Drop in 3D Stacked Integration," International Power Electronics Conference (IPEC), Hiroshima, Japan, pp. 2228-2231, May 2014. (Invited)
[62] X. Zhang, Y. Okuma, P.-H. Chen, K. Ishida, Y. Ryu, K. Watanabe, T. Sakurai, and M. Takamiya, "A 0.6-V Input 94% Peak Efficiency CCM/DCM Digital Buck Converter in 40-nm CMOS with Dual-Mode-Body-Biased Zero-Crossing Detector," IEEE Asian Solid-State Circuits Conference (A-SSCC), Singapore, pp. 45-48, Nov. 2013.
[61] R. Shabanpour, K. Ishida, C. Perumal, B. K. Boroujeni, T. Meister, C. Carta, F. Ellinger, L. Petti, N. Münzenrieder, G.A. Salvatore, and G. Tröster, "A 2.62 MHz 762 µW Cascode Amplifier in Flexible a-IGZO Thin-Film Technology for Textile and Wearable-Electronics Applications," International Semiconductor Conference Dresden - Grenoble (ISCDG), Dresden, Germany, 26-27 Sep. 2013.
[60] C. Carta, K. Ishida, B.K. Boroujeni, R. Shabanpour, T. Meister, G. Schmidt, E. Suomalainen, A. Brandlmaier, G.A. Salvatore, N. Munzenrieder, L. Petti, G. Tröster, D. Petrantonakis, D. Kozakis, R. Paradiso, M. Krebs, M. Tuomikoski, H.-J. Egelhaaf, and F. Ellinger, "Overview of the EC project FLEXIBILITY: Organic and thin-film ICs up to radio frequencies for multifunctional flexible systems," SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC), pp. 1-2, Rio de Janeiro, Brazil, 4-7 Aug. 2013
[59] H. Fuketa, K. Ishida, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "Large-Area and Flexible Sensors with Organic Transistors," IEEE International Workshop on Advances in Sensors and Interfaces (IWASI), Bari, Italy, pp. 87-90, June 2013. (Invited)
[58] M. Nomura, A. Muramatsu, H. Takeno, S. Hattori, D. Ogawa, M. Nasu, K. Hirairi, S. Kumashiro, S. Moriwaki, Y. Yamamoto, S. Miyano, Y. Hiraku, I. Hayashi, K. Yoshioka, A. Shikata, H. Ishikuro, M. Ahn, Y. Okuma, X. Zhang, Y. Ryu, K. Ishida, M. Takamiya, T. Kuroda, H. Shinohara, and T. Sakurai, "0.5V Image Processor with 563 GOPS/W SIMD and 32bit CPU Using High Voltage Clock Distribution (HVCD) and Adaptive Frequency Scaling (AFS) with 40nm CMOS," 2013 Symposium on VLSI Circuits, Kyoto, Japan, pp. C36 - C37, June 2013.
[57] S. Iguchi, P. Yeon, H. Fuketa, K. Ishida, T. Sakurai, and M. Takamiya, "Zero Phase Difference Capacitance Control (ZPDCC) for Magnetically Resonant Wireless Power Transmission," IEEE Wireless Power Transfer Conference (WPTC), Perugia, Italy, pp. 25-26, May. 2013. (Best Paper Award)
[56] H. Fuketa, Y. Shinozuka, K. Ishida, M. Takamiya, T. Fujii, H. Shimizu, K. Kobayashi, T. Sato, and T. Sakurai, "Efficiency Increase in On-Chip Buck Converter by Introduction of High Permeability Material to Inductor on Interposer," International Conference on Ferrites (ICF), Okinawa, p. 75, Apr. 2013.
[55] Y. Shinozuka, H. Fuketa, K. Ishida, F. Furuta, K. Osada, K. Takeda, M. Takamiya, and T. Sakurai, "Reducing IR Drop in 3D Integration to Less Than 1/4 Using Buck Converter on Top Die (BCT) Scheme," IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, USA, pp. 210-215, Mar. 2013.
[54] H. Fuketa, K. Yoshioka, Y. Shinozuka, K. Ishida, T. Yokota, N. Matsuhisa, Y. Inoue, M. Sekino, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "1µm-Thickness 64-Channel Surface Electromyogram Measurement Sheet with 2V Organic Transistors for Prosthetic Hand Control," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, pp.104-105, Feb. 2013.
[53] X. Zhang, P.-H. Chen, Y. Ryu, K. Ishida, Y. Okuma, K. Watanabe, T. Sakurai, and M. Takamiya, "A Low Voltage Buck DC-DC Converter Using On-Chip Gate Boost Technique in 40nm CMOS," Asia-South Pacific Design Automation Conference (ASP-DAC), Yokohama, Japan, pp. 109-110, Jan. 2013.
[52] M. Takamiya, K. Ishida, K. Takemura, and T. Sakurai, "3D Stacked Buck Converter with SrTiO3 (STO) Capacitors on Silicon Interposer," IEEE International Workshop on Power Supply on Chip (PowerSoC), San Francisco, USA, 4-3, Nov. 2012. (Invited)
[51] M. Takamiya, K. Ishida, H. Fuketa, T. Sekitani, T. Someya, and T. Sakurai, "Printable and Flexible Electronics with Organic Transistors," IEEE International Conference on Computer-Aided Design (ICCAD), San Jose, USA, 7D-2, Nov. 2012. (Invited)
[50] X. Zhang, Y. Pu, K. Ishida, Y. Ryu. Y. Okuma, P.-H. Chen, K. Watanabe, T. Sakurai, and M. Takamiya, “Low Voltage Switched-Capacitor Voltage Converter with Improved Light Load Efficiency,” 3rd IEICE International Conference on Integrated Circuits and Devices in Vietnam (ICDV), Danang, Vietnam, pp. 46-51, Aug. 2012.
[49] X. Zhang, P.-H. Chen, Y. Ryu, K. Ishida, Y. Okuma, K. Watanabe, T. Sakurai, and M. Takamiya, "A 0.45-V Input On-Chip Gate Boosted (OGB) Buck Converter in 40-nm CMOS with More Than 90% Efficiency in Load Range from 2µW to 50µW," IEEE Symposium on VLSI Circuits, Hawaii, USA, pp.194-195, June 2012.
[48] H. Lim, K. Ishida, M. Takamiya, and T. Sakurai, "Positioning-Free Magnetically Resonant Wireless Power Transmission Board with Staggered Repeater Coil Array (SRCA)," IEEE MTT-S International Microwave Workshop Series (IMWS) on Innovative Wireless Power Transmission: Technologies, Systems, and Applications (IMWS-IWPT), Kyoto, Japan, pp. 93-96, May 2012.
[47] T. Sekitani, T. Yokota, K. Ishida, T.-C. Huang, K. Honda, Y. Shinozuka, H. Fuketa, U. Zschieschang, H. Klauk, M. Takamiya, T. Sakurai, and T. Someya “Flexible, large-area energy harvesting systems with integrated 2-V organic digital and analog circuits and ferroelectric polymer films”, Material Research Society (MRS) Spring Meeting, Symposium K, Advanced Materials and Processes for “Systems-on-Plastic, Moscone West Convention Center, San Francisco, U.S.A, Apr. 9-13, 2012.
[46] K. Ishida, T.-C. Huang, K. Honda, Y. Shinozuka, H. Fuketa, T. Yokota, U. Zschieschang, H. Klauk, G. Tortissier, T. Sekitani, M. Takamiya, H. Toshiyoshi, T. Someya, and T. Sakurai, "Insole Pedometer With Piezoelectric Energy Harvester and 2V Organic Digital and Analog Circuits," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, 18.1, pp.308-309, Feb. 2012.
[45] P.-H. Chen, K. Ishida, X. Zhang, Y. Okuma, Y. Ryu, M. Takamiya, and T. Sakurai, "A 120-mV Input, Fully Integrated Dual-Mode Charge Pump in 65-nm CMOS for Thermoelectric Energy Harvester," Proceedings of 2012 IEEE Asia and South Pacific Design Automation Conference, University LSI Design Contest, Sydney, Australia, Feb. 2012 (Best UDC Design Award).
[44] T.-C. Huang, K. Ishida, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "A Floating-Gate OTFT-Driven AMOLED Pixel Circuit for Variation and Degradation Compensation in Large-Sized Flexible Displays," International Display Workshop (IDW), Nagoya, Japan, pp. 1643-1646, Dec. 2011. (Invited)
[43] T. Sekitani, T.-C. Huang, K. Ishida, Kazuo Takimiya, M. Takamiya, T. Sakurai, and T. Someya, “Compliant, large-area organic active-matrix LED pixel circuits driven by organic floating-gate transistors”, Material Research Sociately (MRS) Fall meeting, Symposium R: Compliant electronics and photonics, Hynes Convention Center, Boston, MA, November 28 - December 2, 2011.
[42] P.-H. Chen, K. Ishida, X. Zhang, Y. Okuma, Y. Ryu, M. Takamiya, and T. Sakurai, "A 80-mV Input, Dual-Mode Boost Converter with Charge-Pumped Pulse Generator for Energy Harvesting," Proceedings of 2011 IEEE Asian Solid-State Circuits Conference (A-SSCC), Jeju, Korea, pp. 33-36, Nov. 2011.
[41] K. Ishida, T.-C. Huang, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "Large-Area Flexible Electronics with Organic Transistors," IEEE International Midwest Symposium on Circuits and Systems, Seoul, Korea, pp.1-4, Aug. 2011. (Invited)
[40] X. Zhang, Y. Pu, K. Ishida, Y. Ryu, Y. Okuma, P.-H. Chen, K. Watanabe, T. Sakurai, and M. Takamiya, "A Voltage-Reference-Free Pulse Density Modulation (VRF-PDM) 1-V Input Switched-Capacitor 1/2 Voltage Converter with Output Voltage Trimming by Hot Carrier Injection and Periodic Activation Scheme," IEEE/JSAP Symposium on VLSI Circuits Digest of Technical Papers, pp.280-281, June 2011.
[39] T.-C. Huang, K. Ishida, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "A Floating-Gate-OTFT-Driven AMOLED Pixel Circuit for Variation and Degradation Compensation in Large-Sized Flexible Displays," The Society for Information Display’s Symposium, Seminar, and Exhibition (SID), 13.2, Los Angeles, USA, May 2011.
[38] T. Sekitani, K. Ishida, T.-C. Huang, K. Honda, H. Nakajima, H. Maeda, T. Yamamoto, K. Takimiya, M. Ikeda, H. Kuwabara, M. Takamiya, T. Sakurai, and T. Someya, “Power Meter System Integrating 100-V Organic PMOS Rectifier with 20-V Organic CMOS Digital and Analog Circuits”, Material Research Society (MRS) Spring Meeting, Symposium T, “Low-Temperature-Processed Thin-Film Transistors”, Moscone West Convention Center, San Francisco, USA, Apr. 25-29, 2011.
[37] K. Takemura, K. Ishida, Y. Ishii, K. Maeda, M. Takamiya, T. Sakurai, and K. Baba, "Si Interposers with Thick Spiral Inductors for 3D Stacked Buck Converters," JIEP/IEEE International Conference on Electronics Packaging, Nara, Japan, Apr. 2011.
[36] K. Ishida, T.-C. Huang, K. Honda, T. Sekitani, H. Nakajima, H. Maeda, M. Takamiya, T. Someya, and T. Sakurai, "100-V AC Power Meter System-on-a-Film (SoF) Integrating 20-V Organic CMOS Digital and Analog Circuits with Floating Gate for Process Variation Compensation and 100-V Organic PMOS Rectifier," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, 12.2, pp.218-219, Feb. 2011.
[35] P.-H. Chen, K. Ishida, Katsuyuki Ikeuchi, X. Zhang, K. Honda, Y. Okuma, Y. Ryu, M. Takamiya, and T. Sakurai, "A 95mV-Startup Step-Up Converter with VTH-Tuned Oscillator by Fixed-Charge Programming and Capacitor Pass-on Scheme," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, 12.1, pp.216-217, Feb. 2011.
[34] X. Zhang, K. Ishida, M. Takamiya, and T. Sakurai, "An On-Chip Characterizing System for Within-Die Delay Variation Measurement of Individual Standard Cells in 65-nm CMOS," Proceedings of 2011 IEEE Asia and South Pacific Design Automation Conference, University LSI Design Contest, pp.109-110, Jan. 2011.
[33] M. Takamiya, K. Ishida, T. Sekitani, U. Zschieschang, H. Klauk, T. Someya, and T. Sakurai, "Large Area Electronics with Organic Transistors and Novel Interconnects: EMI Measurement Sheet with Stretchable Interconnects and User Customizable Logic Paper (UCLP) with Ink-Jet Printed Interconnects," International Display Workshop (IDW), Fukuoka, Japan, pp.1577-1580, Dec. 2010. (Invited)
[32] K. Ishida, K. Takemura, K. Baba, M. Takamiya, and T. Sakurai, "3D Stacked Buck Converter with 15-μm Thick Spiral Inductor on Silicon Interposer for Fine-Grain Power-Supply Voltage Control in SiP's," IEEE International Conference on 3D System Integration (3D IC), Munich, Germany, Nov. 2010.
[31] X. Zhang, Y. Pu, K. Ishida, Y. Ryu, Yasuaki Okuma, P.-H. Chen, K. Watanabe, T. Sakurai, and M. Takamiya, "A 1-V Input, 0.2-V to 0.47-V Output Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction," Proceedings of 2010 IEEE Asian Solid-State Circuits Conference (A-SSCC), Beijing, China, pp.61-64, Nov. 2010.
[30] M. Takamiya, K. Ishida, T. Sekitani, T. Someya, and T. Sakurai, "Design of Large Area Electronics with Organic Transistors," IEEE International Conference on Computer-Aided Design (ICCAD), San Jose, USA, pp.500-503, Nov. 2010. (Invited)
[29] T. Sekitani, K. Ishida, M. Takamiya, T. Sakurai, T. Someya, "Stretchable large-area electronics using organic transistor integrated circuits," IEEE International Conference on Solid-State and Integrated Circuit Technology (ICSICT), pp.1272-1275, Nov. 2010.
[28] T. Sekitani, K. Ishida, N. Masunaga, R. Takahashi, S. Shino, U. Zschieschang, H. Klauk, M. Takamiya, T. Sakurai1, and T. Someya, "Organic CMOS Logic Papers with In-Field User Customizability," International Conference on Solid State Devices and Materials,A-6-2, Tokyo, Japan, Sep. 2010.
[27] N. Masunaga, K. Ishida, M. Takamiya, and T. Sakurai, "EMI Camera LSI (EMcam) with On-Chip Loop Antenna Matrix to Measure EMI Noise Distribution with 60um-level Spatial Precision," IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, pp.449-452, Sep. 2010.
[26] Y. Okuma, K. Ishida, Y. Ryu, X. Zhang, P.-H. Chen, K. Watanabe, M. Takamiya, and T. Sakurai, "0.5-V Input Digital LDO with 98.7% Current Efficiency and 2.7-uA Quiescent Current in 65nm CMOS," IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, pp.323-326, Sep. 2010.
[25] P.-H. Chen, K. Ishida, X. Zhang, Y. Okuma, Y. Ryu, M. Takamiya, and T. Sakurai, "0.18-V Input Charge Pump with Forward Body Biasing in Startup Circuit using 65nm CMOS," IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, pp.239-242, Sep. 2010.
[24] T. Hatanaka, K. Ishida, T. Yasufuku, S. Miyamoto, H. Nakai, M. Takamiya, T. Sakurai, and K. Takeuchi, "A 60% Higher Write Speed, 4.2Gbps, 24-Channel 3D-Solid State Drive (SSD) with NAND Flash Channel Number Detector and Intelligent Program-Voltage Booster,"IEEE Symposium on VLSI Circuits, Honolulu, Hawaii, USA, pp.233-234, June 2010.
[23] K. Ishida, N. Masunaga, R. Takahashi, T. Sekitani, S. Shino, U. Zschieschang, H. Klauk, M. Takamiya, T. Someya, and T. Sakurai, "User Customizable Logic Paper (UCLP) with Organic Sea-of Transmission-Gates (SOTG) Architecture and Ink-Jet Printed Interconnects," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, pp.138-139, Feb. 2010.
[22] T. Yasufuku, K. Ishida, S. Miyamoto, H. Nakai, M. Takamiya, T. Sakurai, and K. Takeuchi, "Effect of Resistance of TSV’s on Performance of Boost Converter for Low Power 3D SSD with NAND Flash Memories ," IEEE International Conference on 3D System Integration (3D IC), San Francisco, USA, Sep. 2009.
[21] K. Ikeuchi, K. Sakaida, K. Ishida, T. Sakurai, and M. Takamiya, "Switched Resonant Clocking (SRC) Scheme Enabling Dynamic Frequency Scaling and Low-Speed Test ," IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, pp.33-36, Sep. 2009.
[20] T. Yasufuku, K. Ishida, S. Miyamoto, H. Nakai, M. Takamiya, T. Sakurai, and K. Takeuchi, "Inductor Design of 20-V Boost Converter for Low Power 3D Solid State Drive with NAND Flash Memories ," International Symposium on Low Power Electronics and Design (ISLPED), San Francisco, USA, pp.87-91, Aug. 2009.
[19] N. Masunaga, K. Ishida, Z. Zhou, T. Yasufuku, T. Sekitani, M. Takamiya, T. Someya, and T. Sakurai, "A Flexible EMI Measurement Sheet to Measure Electric and Magnetic Fields Separately with Distributed Antennas and LSI’s," IEEE International Symposium on Electromagnetic Compatibility, Austin, USA, pp.156-160, Aug. 2009.
[18] K. Ishida, N. Masunaga, Z. Zhou, T. Yasufuku, T. Sekitani, U. Zschieschang, H. Klauk, M. Takamiya, T. Someya, and T. Sakurai, "A Stretchable EMI Measurement Sheet with 8×8 Coil Array, 2V Organic CMOS Decoder, and -70dBm EMI Detection Circuits in 0.18um CMOS," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, pp.472-473, Feb. 2009.
[17] K. Ishida, T. Yasufuku, S. Miyamoto, H. Nakai, M. Takamiya, T. Sakurai, and K. Takeuchi, "A 1.8V 30nJ Adaptive Program-Voltage (20V) Generator for 3D-Integrated NAND Flash SSD," IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, USA, pp.238-239, Feb. 2009.
[16] L. Liu, Y. Miyamoto, Z. Zhou, K. Sakaida, J. Ryu, K. Ishida, M. Takamiya, and T. Sakurai, "A 100Mbps, 0.19mW Asynchronous Threshold Detector with DC Power-Free Pulse Discrimination for Impulse UWB Receiver," Asia-South Pacific Design Automation Conference (ASP-DAC), Yokohama, Japan, pp.97-98, Jan. 2009.
[15] T. Niiyama, K. Ishida, M. Takamiya, and T. Sakurai, "Expected Vectorless Teacher-Student Swap (TSS) Test Method with Dual Power Supply Voltages for 0.3V Homogeneous Multi-core LSI’s," IEEE Custom Integrated Circuits Conference (CICC), San Jose, USA, pp.137-140, Sep. 2008.
[14] T. Niiyama, P. Zhe, K. Ishida, M. Murakata, M. Takamiya, and T. Sakurai, "Increasing Minimum Operating Voltage (VDDmin) with Number of CMOS Logic Gates and Experimental Verification with up to 1Mega-Stage Ring Oscillators," International Symposium on Low Power Electronics and Design (ISLPED), Bangalore, India, pp.117-122, Aug. 2008.
[13] L. Liu, Y. Miyamoto, Z. Zhou, K. Sakaida, J. Ryu, K. Ishida, M. Takamiya, and T. Sakurai, " A 100Mbps, 0.41mW, DC-960MHz Band Impulse UWB Transceiver in 90nm CMOS," IEEE Symposium on VLSI Circuits, Honolulu, Hawaii, USA, pp.118-119, June 2008.
[12] T. Niiyama, P. Zhe, K. Ishida, M. Murakata, M. Takamiya, and T. Sakurai, "Dependence of Minimum Operating Voltage (VDDmin) on Block Size of 90-nm CMOS Ring Oscillators and Its Implications in Low Power DFM," IEEE International Symposium on Quality Electronic Design (ISQED), San Jose, USA, pp.133-136, March 2008.
[11] Y. Kobayashi, K. Ishida, K. Okada, K. Masu, and Y. Horiike, "A Batteryless Wireless Communication Circuit for Measurement of Gastric Acid," Technical Programme of IEEE Biomedical Circuits and Systems Conference, pp.5-8, Nov. 2006.
[10] K. Ohashi, T. Yammouch, M. Kimura, H. Ito, K. Okada, K. Ishida, K. Itoi, M. Sato, T. Ito, and K. Masu, "On-Chip Yagi Antenna for Wireless Signal Transmission in Stacked MCP," International Conference on Solid State Devices and Materials, pp.68-69, Sep. 2006.
[9] T. Yammouch, K. Ishida, K. Okada, and K. Masu, "Equivalent Circuit Model for On-Chip Variable Inductor," International Conference on Solid State Devices and Materials, pp.58-59, Sep. 2006.
[8] A. Tamtrakarn, H. Ishikuro, K. Ishida, and T. Sakurai, "Compact outside-rail circuit structure by single-cascode two-transistor topology," Proceedings of IEEE 2006 Custom Integrated Circuits Conference, pp.619-622, Sep. 2006.
[7] A. Tamtrakarn, H. Ishikuro, K. Ishida, M. Takamiya, T. Sakurai, "A 1-V 299μW Flashing UWB Transceiver Based on Double Thresholding Scheme," IEEE Symposium on VLSI Circuits Digest of Technical Papers, pp.202-203, June 2006.
[6] K. Ishida, A. Tamtrakarn, and T. Sakurai, "A 0.5-V Sigma-Delta Modulator Using Analog T-Switch Scheme for the Subthreshold Leakage Suppression," Proceedings of 2006 IEEE Asia and South Pacific Design Automation Conference, University LSI Design Contest, pp.98-99, Jan. 2006.
[5] K. Ishida, A. Tamtrakarn, H. Ishikuro, and T. Sakurai, "An Outside-Rail Opamp Design Targeting for Future Scaled Transistors," Proceedings of 2005 IEEE Asian Solid-State Circuits Conference, pp.73-76, Nov. 2005.
[4] A. Tamtrakarn, K. Ishida, and T. Sakurai, "A 20% Power Reduction in Two-stage Opamp by Source-Degenerated Active-Load Phase Compensation," Extended Abstracts of the 2005 International Conference on Solid State Devices and Materials, pp.672-673, Kobe, Sep. 2005.
[3] K. Ishida, K. Kanda, A. Tamtrakarn, H. Kawaguchi, and T. Sakurai, " Managing Leakage in Charge-Based Analog Circuits with Low-VTH Transistors by Analog T- Switch (AT-Switch) and Super Cut-off CMOS," IEEE/JSAP Symposium on VLSI Circuits Digest of Technical Papers, pp.122-125, June 2005.
[2] K. Ishida, K. Kanda, A. Tamtrakarn, H. Kawaguchi, and T. Sakurai, "Subthreshold-Leakage Suppressed Switched Capacitor Circuit Based on Super Cut-Off CMOS (SCCMOS)," Proceedings of IEEE International Symposium on Circuits and Systems, pp.3119-3122, May 2005.
[1] K. Kanda, D. D. Antono, K. Ishida, H. Kawaguchi, T. Kuroda, and T. Sakurai, "1.27-Gbps/pin, 3mW/pin Wireless Superconnect (WSC) Interface Scheme," IEEE International Solid-State Circuits Conference Digest of Technical Papers, pp.186-187, Feb. 2003.