A switched-current ΣΔ converter for direct photodiode interfacing

Author

Bracey, M. ; Redman-White, W. ; Hughes, J.B.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

4

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

287

Abstract

A switched-current (SI) sigma-delta modulator for the direct digitisation of photodiode currents is described. The noise-shaping filter is implemented by an SI second generation grounded gate integrator, and a current driven regenerative comparator forms the single bit quantiser. Measured results are presented for an IC implemented in a 0.8 μm standard 5 V digital CMOS process

Keywords

CMOS digital integrated circuits; comparators (circuits); integrating circuits; photodiodes; quantisation (signal); sigma-delta modulation; switched current circuits; 0.8 micron; 5 V; current driven regenerative comparator; digital CMOS process; direct digitisation; direct photodiode interfacing; noise-shaping filter; photodiode currents; second generation grounded gate integrator; single bit quantiser; switched-current ΣΔ converter; CMOS digital integrated circuits; CMOS integrated circuits; CMOS process; Delta-sigma modulation; Digital modulation; Filters; Measurement standards; Noise shaping; Photodiodes; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409253

Filename

409253