A 0.7-V opamp in scaled low-standby-power FinFET technology

Shin Ichi O'uchi; Kazuhiko Endo; Takashi Matsukawa; Yongxun Liu; Tadashi Nakagawa; Yuki Ishikawa; Junichi Tsukada; Hiromi Yamauchi; Toshihiro Sekigawa; Hanpei Koike; Kunihiro Sakamoto; Meishoku Masahara

doi:10.1587/transele.E95.C.686

A 0.7-V opamp in scaled low-standby-power FinFET technology

Shin Ichi O'uchi, Kazuhiko Endo, Takashi Matsukawa, Yongxun Liu, Tadashi Nakagawa, Yuki Ishikawa, Junichi Tsukada, Hiromi Yamauchi, Toshihiro Sekigawa, Hanpei Koike, Kunihiro Sakamoto, Meishoku Masahara

IFS - Global Collaborative Research and Education Center for Integrated Flow Science (IFS-GCORE)

National Institute of Advanced Industrial Science and Technology

Research output: Contribution to journal › Article › peer-review

Abstract

This paper demonstrates a FinFET operational amplifier (opamp), which is suitable to be integrated with digital circuits in a scaled low-standby-power (LSTP) technology and operates at extremely low voltage. The opamp is consisting of an adaptive threshold-voltage (V_t) differential pair and a low-voltage source follower using independent-double-gate-(IDG-) FinFETs. These two components enable the opamp to extend the common-mode voltage range (CMR) below the nominal V_t even if the supply voltage is less than 1.0 V. The opamp was implemented by our FinFET technology co-integrating common-DG-(CDG-) and IDG-FinFETs. More than 40-dB DC gain and 1-MHz gain-bandwidth product in the 500-mV-wide input CMR at the supply voltage of 0.7 V was estimated with SPICE simulation. The fabricated chip successfully demonstrated the 0.7-V operation with the 480-mV-wide CMR, even though the nominal V_t was 400 mV.

Original language	English
Pages (from-to)	686-695
Number of pages	10
Journal	IEICE Transactions on Electronics
Volume	E95-C
Issue number	4
DOIs	https://doi.org/10.1587/transele.E95.C.686
Publication status	Published - 2012 Apr

Keywords

Common-Double-Gate FinFET
Common-mode voltage range
Differential amplifier
Independent-Double-Gate FinFET
Low voltage
Source follower

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10.1587/transele.E95.C.686

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title = "A 0.7-V opamp in scaled low-standby-power FinFET technology",

abstract = "This paper demonstrates a FinFET operational amplifier (opamp), which is suitable to be integrated with digital circuits in a scaled low-standby-power (LSTP) technology and operates at extremely low voltage. The opamp is consisting of an adaptive threshold-voltage (Vt) differential pair and a low-voltage source follower using independent-double-gate-(IDG-) FinFETs. These two components enable the opamp to extend the common-mode voltage range (CMR) below the nominal Vt even if the supply voltage is less than 1.0 V. The opamp was implemented by our FinFET technology co-integrating common-DG-(CDG-) and IDG-FinFETs. More than 40-dB DC gain and 1-MHz gain-bandwidth product in the 500-mV-wide input CMR at the supply voltage of 0.7 V was estimated with SPICE simulation. The fabricated chip successfully demonstrated the 0.7-V operation with the 480-mV-wide CMR, even though the nominal Vt was 400 mV.",

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author = "O'uchi, {Shin Ichi} and Kazuhiko Endo and Takashi Matsukawa and Yongxun Liu and Tadashi Nakagawa and Yuki Ishikawa and Junichi Tsukada and Hiromi Yamauchi and Toshihiro Sekigawa and Hanpei Koike and Kunihiro Sakamoto and Meishoku Masahara",

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doi = "10.1587/transele.E95.C.686",

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AU - O'uchi, Shin Ichi

AU - Endo, Kazuhiko

AU - Matsukawa, Takashi

AU - Liu, Yongxun

AU - Nakagawa, Tadashi

AU - Ishikawa, Yuki

AU - Tsukada, Junichi

AU - Yamauchi, Hiromi

AU - Sekigawa, Toshihiro

AU - Koike, Hanpei

AU - Sakamoto, Kunihiro

AU - Masahara, Meishoku

PY - 2012/4

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N2 - This paper demonstrates a FinFET operational amplifier (opamp), which is suitable to be integrated with digital circuits in a scaled low-standby-power (LSTP) technology and operates at extremely low voltage. The opamp is consisting of an adaptive threshold-voltage (Vt) differential pair and a low-voltage source follower using independent-double-gate-(IDG-) FinFETs. These two components enable the opamp to extend the common-mode voltage range (CMR) below the nominal Vt even if the supply voltage is less than 1.0 V. The opamp was implemented by our FinFET technology co-integrating common-DG-(CDG-) and IDG-FinFETs. More than 40-dB DC gain and 1-MHz gain-bandwidth product in the 500-mV-wide input CMR at the supply voltage of 0.7 V was estimated with SPICE simulation. The fabricated chip successfully demonstrated the 0.7-V operation with the 480-mV-wide CMR, even though the nominal Vt was 400 mV.

AB - This paper demonstrates a FinFET operational amplifier (opamp), which is suitable to be integrated with digital circuits in a scaled low-standby-power (LSTP) technology and operates at extremely low voltage. The opamp is consisting of an adaptive threshold-voltage (Vt) differential pair and a low-voltage source follower using independent-double-gate-(IDG-) FinFETs. These two components enable the opamp to extend the common-mode voltage range (CMR) below the nominal Vt even if the supply voltage is less than 1.0 V. The opamp was implemented by our FinFET technology co-integrating common-DG-(CDG-) and IDG-FinFETs. More than 40-dB DC gain and 1-MHz gain-bandwidth product in the 500-mV-wide input CMR at the supply voltage of 0.7 V was estimated with SPICE simulation. The fabricated chip successfully demonstrated the 0.7-V operation with the 480-mV-wide CMR, even though the nominal Vt was 400 mV.

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KW - Independent-Double-Gate FinFET

KW - Low voltage

KW - Source follower

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A 0.7-V opamp in scaled low-standby-power FinFET technology

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