Makoto Takamiya

Publications (38)87.45 Total impact

• Article: A 100-V AC Energy Meter Integrating 20-V Organic CMOS Digital and Analog Circuits With a Floating Gate for Process Variation Compensation and a 100-V Organic pMOS Rectifier.

  Koichi Ishida, Tsung-Ching Huang, Kentaro Honda, Tsuyoshi Sekitani, Hiroyoshi Nakajima, Hiroki Maeda, Makoto Takamiya, Takao Someya, Takayasu Sakurai
  J. Solid-State Circuits. 01/2012; 47:301-309.
• Article: A 4 V Operation, Flexible Braille Display Using Organic Transistors, Carbon Nanotube Actuators, and Organic Static Random‐Access Memory

  Kenjiro Fukuda, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, Kazunori Kuribara, Tomoyuki Yokota, Takushi Sugino, Kinji Asaka, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuya Yamamoto, Kazuo Takimiya, Takanori Fukushima, Takuzo Aida, Makoto Takamiya, Takayasu Sakurai, Takao Someya
  Advanced Functional Materials 09/2011; 21(21):4019 - 4027. · 10.18 Impact Factor
• Article: Control of threshold voltage in low-voltage organic complementary inverter circuits with floating gate structures

  Tomoyuki Yokota, Takashi Nakagawa, Tsuyoshi Sekitani, Yoshiaki Noguchi, Kenjiro Fukuda, Ute Zschieschang, Hagen Klauk, Ken Takeuchi, Makoto Takamiya, Takayasu Sakurai, Takao Someya
  [show abstract] [hide abstract]
  ABSTRACT: We have demonstrated threshold-voltage control of p- and n-channel organic transistors with a floating-gate structure and self-assembled monolayer-based gate dielectrics and applied this technique to tune the switching voltage of organic complementary inverters. The threshold voltages of the p- and n-channel transistors are changed independently and systematically across a wide range from +2.4 to –1 V and from –0.3 to +1.5 V, respectively, when the program voltages of –6 V and +6 V are applied to the p- and n-channel transistors, respectively. Furthermore, we fabricated tunable organic complementary inverters, and ring oscillators whose oscillations are controlled by varying floating-gate charges.
  Applied Physics Letters 05/2011; 98(19):193302-193302-3. · 3.84 Impact Factor
• Source

  Available from: ac.jp

  Article: User Customizable Logic Paper (UCLP) With Sea-Of Transmission-Gates (SOTG) of 2-V Organic CMOS and Ink-Jet Printed Interconnects

  Koichi Ishida, Naoki Masunaga, Ryo Takahashi, Tsuyoshi Sekitani, Shigeki Shino, Ute Zschieschang, Hagen Klauk, Makoto Takamiya, Takao Someya, Takayasu Sakurai
  [show abstract] [hide abstract]
  ABSTRACT: In this paper we present User Customizable Logic Paper (UCLP) with a Sea-of Transmission-Gates (SOTG) of 2-V organic CMOS transistors. This can enable users to fabricate custom integrated circuits, by printing 200 m wide interconnects with at-home ink-jet printers for the prototyping of large-area electronics and educational purposes. The SOTG reduces the area of the circuits in UCLP by between 11% and 85% compared with a conventional gate array architecture.
  IEEE Journal of Solid-State Circuits 01/2011; 46. · 3.23 Impact Factor
• Source

  Available from: u-tokyo.ac.jp

  Article: 0.6 V Voltage Shifter and Clocked Comparator for Sampling Correlation-Based Impulse Radio UWB Receiver.

  Lechang Liu, Takayasu Sakurai, Makoto Takamiya
  IEICE Transactions. 01/2011; 94-C:985-991.
• Source

  Available from: u-tokyo.ac.jp

  Article: 0.18-V Input Charge Pump with Forward Body Bias to Startup Boost Converter for Energy Harvesting Applications.

  Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai
  IEICE Transactions. 01/2011; 94-C:598-604.
• Source

  Available from: u-tokyo.ac.jp

  Conference Proceeding: An on-chip characterizing system for within-die delay variation measurement of individual standard cells in 65-nm CMOS.

  Xin Zhang, Koichi Ishida, Makoto Takamiya, Takayasu Sakurai
  Proceedings of the 16th Asia South Pacific Design Automation Conference, ASP-DAC 2011, Yokohama, Japan, January 25-27, 2011; 01/2011
• Article: A Variable Output Voltage Switched-Capacitor DC-DC Converter with Pulse Density and Width Modulation (PDWM) for 57% Ripple Reduction at Low Output Voltage.

  Xin Zhang, Yu Pu, Koichi Ishida, Yoshikatsu Ryu, Yasuyuki Okuma, Po-Hung Chen, Takayasu Sakurai, Makoto Takamiya
  IEICE Transactions. 01/2011; 94-C:953-959.
• Conference Proceeding: Reduction of minimum operating voltage (V

  Kentaro Honda, Katsuyuki Ikeuchi, Masahiro Nomura, Makoto Takamiya, Takayasu Sakurai
  Proceedings of the 2010 International Symposium on Low Power Electronics and Design, 2010, Austin, Texas, USA, August 18-20, 2010; 01/2011
• Conference Proceeding: A 95mV-startup step-up converter with Vth-tuned oscillator by fixed-charge programming and capacitor pass-on scheme.

  Po-Hung Chen, Koichi Ishida, Katsuyuki Ikeuchi, Xin Zhang, Kentaro Honda, Yasuyuki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai
  IEEE International Solid-State Circuits Conference, ISSCC 2011, Digest of Technical Papers, San Francisco, CA, USA, 20-24 February, 2011; 01/2011
• Article: Power Supply Voltage Dependence of Within-Die Delay Variation of Regular Manual Layout and Irregular Place-and-Route Layout.

  Tadashi Yasufuku, Yasumi Nakamura, Piao Zhe, Makoto Takamiya, Takayasu Sakurai
  IEICE Transactions. 01/2011; 94-C:1072-1075.
• Source

  Available from: u-tokyo.ac.jp

  Article: 0.5-V Input Digital Low-Dropout Regulator (LDO) with 98.7% Current Efficiency in 65 nm CMOS.

  Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Xin Zhang, Po-Hung Chen, Kazunori Watanabe, Makoto Takamiya, Takayasu Sakurai
  IEICE Transactions. 01/2011; 94-C:938-944.
• Source

  Available from: u-tokyo.ac.jp

  Conference Proceeding: 100V AC power meter system-on-a-film (SoF) integrating 20V organic CMOS digital and analog circuits with floating gate for process-variation compensation and 100V organic PMOS rectifier.

  Koichi Ishida, Tsung-Ching Huang, Kentaro Honda, Tsuyoshi Sekitani, Hiroyoshi Nakajima, Hiroki Maeda, Makoto Takamiya, Takao Someya, Takayasu Sakurai
  IEEE International Solid-State Circuits Conference, ISSCC 2011, Digest of Technical Papers, San Francisco, CA, USA, 20-24 February, 2011; 01/2011
• Source

  Available from: u-tokyo.ac.jp

  Article: Difficulty of Power Supply Voltage Scaling in Large Scale Subthreshold Logic Circuits.

  Tadashi Yasufuku, Taro Niiyama, Piao Zhe, Koichi Ishida, Masami Murakata, Makoto Takamiya, Takayasu Sakurai
  IEICE Transactions. 01/2010; 93-C:332-339.
• Source

  Available from: u-tokyo.ac.jp

  Article: Inductor and TSV Design of 20-V Boost Converter for Low Power 3D Solid State Drive with NAND Flash Memories.

  Tadashi Yasufuku, Koichi Ishida, Shinji Miyamoto, Hiroto Nakai, Makoto Takamiya, Takayasu Sakurai, Ken Takeuchi
  IEICE Transactions. 01/2010; 93-C:317-323.
• Article: Stretchable EMI Measurement Sheet With 8 ˟ 8 Coil Array, 2 V Organic CMOS Decoder, and 0.18 μ m Silicon CMOS LSIs for Electric and Magnetic Field Detection.

  Koichi Ishida, Naoki Masunaga, Zhiwei Zhou, Tadashi Yasufuku, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, Makoto Takamiya, Takao Someya, Takayasu Sakurai
  J. Solid-State Circuits. 01/2010; 45:249-259.
• Conference Proceeding: 0.18-V input charge pump with forward body biasing in startup circuit using 65nm CMOS.

  Po-Hung Chen, Koichi Ishida, Xin Zhang, Yasuaki Okuma, Yoshikatsu Ryu, Makoto Takamiya, Takayasu Sakurai
  IEEE Custom Integrated Circuits Conference, CICC 2010, San Jose, California, USA, 19-22 September, 2010, Proceedings; 01/2010
• Conference Proceeding: 0.5-V input digital LDO with 98.7% current efficiency and 2.7-µA quiescent current in 65nm CMOS.

  Yasuyuki Okuma, Koichi Ishida, Yoshikatsu Ryu, Xin Zhang, Po-Hung Chen, Kazunori Watanabe, Makoto Takamiya, Takayasu Sakurai
  IEEE Custom Integrated Circuits Conference, CICC 2010, San Jose, California, USA, 19-22 September, 2010, Proceedings; 01/2010
• Article: A 1.76 mW, 100 Mbps Impulse Radio UWB Receiver with Multiple Sampling Correlators Eliminating Need for Phase Synchronization in 65-nm CMOS.

  Lechang Liu, Zhiwei Zhou, Takayasu Sakurai, Makoto Takamiya
  IEICE Transactions. 01/2010; 93-C:796-802.
• Conference Proceeding: 3D stacked buck converter with 15μm thick spiral inductor on silicon interposer for fine-grain power-supply voltage control in SiP's.

  Koichi Ishida, Koichi Takemura, Kazuhiro Baba, Makoto Takamiya, Takayasu Sakurai
  IEEE International Conference on 3D System Integration, 3DIC 2010, Munich, Germany, 16-18 November 2010; 01/2010