Title :
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
fDate :
30 May-2 Jun 1994
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;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409253
