A scalable high-performance switched-capacitor filter

Author

Wang, Chorng-Kuang ; Castello, Rinaldo ; Gray, Paul R.

Volume

21

Issue

1

fYear

1986

fDate

2/1/1986 12:00:00 AM

Firstpage

57

Lastpage

64

Abstract

Switched-capacitor filters tend to display reduced performance when implemented at reduced feature size because of higher KT/C and 1/f noise, and reduced operational amplifier gain and swing. Descriptions are given of circuit solutions to certain performance degradations associated with technology scaling, including chopper stabilization, and class AB differential operational amplifier architecture. An experimental fifth-order elliptic PCM low-pass filter, using 3-μm CMOS technology, achieved an area of 200 mil per pole. Typical measured results for a ±2.5-V power supply are a dynamic range of 87 dB and a power supply rejection ratio of 40 dB over 1-MHz range.

Keywords

CMOS integrated circuits; Linear integrated circuits; Low-pass filters; Pulse-code modulation; Switched capacitor filters; linear integrated circuits; low-pass filters; pulse-code modulation; switched capacitor filters; CMOS technology; Choppers; Circuit noise; Degradation; Displays; Filters; Noise reduction; Operational amplifiers; Performance gain; Power supplies;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.1986.1052482

Filename

1052482