A 1.8 V CMOS linear transconductor and its application to continuous-time filters

Author

Zhang, Xuguang ; El-Masry, Ezz I.

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

A 1.8 V body-driven CMOS fully balanced transconductor is presented. It is linearly tunable, possesses low distortion and utilizes a common-mode feedback scheme. Simulation shows common-mode voltage varies only 1.3 mV over the tuning range of 1.2 V < V_tune < 1.58 V. Using 0.18 μm n-well CMOS process, a 3^rd order elliptic low-pass filter is implemented using the proposed transconductor. The total harmonic distortion (THD) is more than -46 dB for fully differential input signals up to 0.8 V peak to peak (V_pp) . with the transconductor noise integrated over 1 MHz, 45 dB dynamic range is obtained.

Keywords

CMOS analogue integrated circuits; circuit feedback; continuous time filters; elliptic filters; harmonic distortion; low-pass filters; 0.18 micron; 1.3 mV; 1.8 V; CMOS linear transconductor; CMOS process; common-mode feedback scheme; common-mode voltage; continuous time filters; elliptic low-pass filter; total harmonic distortion; transconductor noise; CMOS process; Circuits; Dynamic range; Impedance; Low voltage; MOSFETs; Nonlinear filters; Topology; Transconductance; Transconductors;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328369

Filename

1328369