Design of a 0.8 volt fully differential CMOS OTA using the bulk-driven technique

被引：56

作者：

Haga, Y ^{[1
]}

Zare-Hoseini, H ^{[1
]}

Berkovi, L ^{[1
]}

Kale, I ^{[1
]}

机构：

[1] Univ Westminster, Dept Elect Syst, Appl DSP & VLSI Res Grp, London W1R 8AL, England

来源：

2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGS | 2005年

关键词：

D O I：

10.1109/ISCAS.2005.1464564

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper explores and presents the possible approaches to the design of low-voltage Operational Transconductance Amplifier (OTA) using the bulk-driven technique. The design of a 0.8 volt fully differential folded-cascode OTA using a 0.35 mu m CMOS technology having a threshold voltage of 0.6 volt is presented. This OTA utilizes bulk-driven differential-pairs to achieve rail-to-rail input operation, and gate- and bulk-biased cascode transistors to increase the output resistance. A continuous-time Common-Mode FeedBack (CMFB) is used for this OTA, which implements the bulk-driven differential pairs to sense the common-mode voltage smaller than the transistor's threshold voltage, as well as bulk-driven current mirrors to reduce voltage headroom consumption. This OTA has been designed using Alcatel's 0.35 mu m twin-well CMOS technology, and the simulation results indicate an open-loop gain > 60dB, unity gain-bandwidth = 3.4MHz with a 5pF load, and an Input Common Mode Range (ICMR) of 0.8V.

引用

页码：220 / 223

页数：4

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