Log-domain circuits in subthreshold MOS

Author

Himmelbauer, Wolfgang ; Andreou, Andreas G.

Author_Institution

Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA

Volume

1

fYear

1997

fDate

3-6 Aug 1997

Firstpage

26

Abstract

This paper considers compact, large signal linear, log-domain circuits that exploit the translinear characteristics of MOS transistors in weak inversion for low power applications in the audio frequency range. We synthesize a single pole log-domain lowpass filter from its state space description and extend the circuit topology to implement a two pole bandpass. Experimental results from a custom fabricated 2 μm CMOS chip are presented that confirm circuit functionality and tunability

Keywords

CMOS analogue integrated circuits; active filters; integrated circuit design; linear network synthesis; low-pass filters; state-space methods; 2 micron; CMOS chip; MOS transistors; audio frequency range; large signal linear circuits; log-domain circuits; low power applications; single pole lowpass filter; state space description; subthreshold MOS; translinear characteristics; tunability; two pole bandpass filter; weak inversion; Band pass filters; Circuit synthesis; Circuit topology; Frequency; Linear systems; Nonlinear filters; Signal processing; Signal synthesis; State-space methods; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on

Conference_Location

Sacramento, CA

Print_ISBN

0-7803-3694-1

Type

conf

DOI

10.1109/MWSCAS.1997.666025

Filename

666025