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
收藏
页码：715 / 721
页数：7
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