An approximate noise computation for general integrator-based SC filters

Author

Goette, Josef ; Kaelin, August ; Guggenbühl, Walter ; Moschytz, George S.

Author_Institution

Swiss Federal Inst. of Technol., Zurich, Switzerland

Volume

38

Issue

11

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

1249

Lastpage

1254

Abstract

An approximate measure for the noise performance of integrator-based SC (switched capacitor) filters of general order n is developed. The measure is dependent on SC-design parameters such as capacitor ratios and capacitance levels, but not on technology-dependent parameters describing the switches and amplifiers. A simple and explicit closed-form expression for this approximate noise measure is derived and compared with more complex-and accurate-measures. The comparison demonstrates extraordinary accuracy for the approximate noise computation presented. An important application for this noise measure is in the optimization of integrator-based SC filters; it is used in the computer-aided design of sensitivity- and noise-optimized SC filters

Keywords

integrating circuits; noise; switched capacitor filters; active filters; approximate noise computation; capacitance levels; capacitor ratios; integrator-based SC filters; noise performance; switched capacitor; Application software; Capacitance measurement; Capacitors; Circuit noise; Design optimization; Dynamic range; Filters; Noise measurement; Switches; Working environment noise;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.99154

Filename

99154