Design Tradeoffs in low-power low-voltage transconductors in weak inversion

Author

Corbishley, Phil ; Rodriguez-Villegas, Esther

Author_Institution

Dept. Electr. & Electron. Eng., Imperial Coll. London, London

Volume

2

fYear

2006

fDate

6-9 Aug. 2006

Firstpage

444

Lastpage

448

Abstract

Many electronic devices benefit from low-power and low-voltage circuits, increasing their battery lifetime and reducing the physical size of the battery. One such circuit is the transconductance amplifier, the building block of gm-C filters. Tradeoffs in designing a low transconductance transconductor using FETs biased in weak inversion are considered Design equations are presented providing accurate approximations to total harmonic distortion (THD), minimum voltage supply, bandwidth and effects of mismatch. The results obtained with these equations are compared with simulations using the BSIM3v3 model.

Keywords

CMOS analogue integrated circuits; approximation theory; harmonic distortion; integrated circuit design; low-power electronics; operational amplifiers; BSIM3v3 model; CMOS differential transconductor; battery lifetime; battery size reduction; design tradeoffs; electronic devices; gm-C filters; low power system design; low-power transconductor; low-voltage circuits; total harmonic distortion; transconductance amplifier; voltage supply; weak inversion mode; Bandwidth; Batteries; Circuits; Equations; FETs; Filters; Total harmonic distortion; Transconductance; Transconductors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. MWSCAS '06. 49th IEEE International Midwest Symposium on

Conference_Location

San Juan

ISSN

1548-3746

Print_ISBN

1-4244-0172-0

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2006.382308

Filename

4267386