A low-voltage high linear body-driven operational transconductance amplifier and its applications

被引：0
|
作者：
Zhang, Lihong [1 ]
Zhang, Xuguang [2 ]
El-Masry, Ezz [2 ]
Zhang, Yuping [3 ]
机构：
[1] Mem Univ Newfoundland, Fac Engn & Appl Sci, ECE, St John, NF A1B 3X5, Canada
[2] Dalhousie Univ, ECE, Halifax, NS, Canada
[3] Shanghai Normal Univ, Sch Mech & Elect Eng, Shanghai, Peoples R China
来源：
2007 CANADIAN CONFERENCE ON ELECTRICAL AND COMPUTER ENGINEERING, VOLS 1-3 | 2007年
基金：
加拿大自然科学与工程研究理事会;
关键词：
analog CMOS circuits; operational transconductance amplifier (OTA); body driven; OTA-C filters;
D O I：
暂无
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Operational transconductance amplifier (OTA) is one of the most significant building-blocks in integrated continuous-time filters. In this paper, we present a body-driven CMOS triode-based fully balanced OTA powered by a single 1.8V supply. It is linearly tunable with the feature of low distortion and high output impedance. It can achieve wide input range without compromising large transconductance tuning interval. Moreover, a new common-mode feedback scheme has been developed so that the common-mode voltage varies only 7mV over the tuning range of 1.2V <= V-tune <= 1.58V. Using a 0.18 mu m N-well CMOS process, we have implemented a third-order elliptic low-pass filter with the aid of the proposed OTA. The total harmonic distortion (THD) is more than -45dB for fully differential input signals up to 0.8V peak-peak (V-pp). Dynamic range of 45dB is obtained under the OTA noise integrated over 1MHz.
引用
收藏
页码：534 / 537
页数：4
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