Low-voltage linearly tunable CMOS transconductor with common-mode feedforward

被引：29

作者：

Calvo, Belen ^{[1
]}

Celma, Santiago ^{[1
]}

Sanz, Maria Teresa ^{[1
]}

Alegre, Juan Pablo ^{[1
]}

Aznar, Francisco ^{[1
]}

机构：

[1] Univ Zaragoza, Aragon Inst Engn Res, Elect Design Grp, E-50009 Zaragoza, Spain

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS | 2008年 / 55卷 / 03期

关键词：

CMOS analog integrated circuits; common-mode feedforward (CMFF); low-voltage design; transconductance amplifiers;

D O I：

10.1109/TCSI.2008.919746

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 presents a new low-voltage pseudodifferential continuous-time CMOS transconductor for wide-band applications. The proposed cell is based on a feedforward cancellation of the input common-mode signal and keeps the input common mode voltage constant, while the transconductance is easily tunable through a continuous bias voltage. Linearity is preserved during the tuning process for a moderate range of transconductance values. Measurements results for a 0.35-mu m CMOS design show a 1:2 G, tuning range with total harmonic distortion figures at 10 MHz below -58 dB over the whole range up to a 200-mu A(p-p) differential output current. The proposed cell consumes less than 1.1 mW from a single 1.8-V supply.

引用

页码：715 / 721

页数：7

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