Integratable switched-capacitor sigma-delta modulator

Details Integratable switched-capacitor sigma-delta modulator Integratable switched-capacitor sigma-delta modulator

1990-05-07

1991-10-15

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341172, 375122, H03M 302

Patent

active

050578391

ABSTRACT:
A switched-capacitor sigma-delta modulator includes at least one memory element, at least one comparator connected to the at least one memory element, and at least one integrator connected to the at least one comparator. The at least one integrator has a first input stage including a series circuit of a first switch, a first capacitor with two terminals and a second switch, a third switch for connecting one of the two terminals of the first capacitor to ground potential, and a fourth switch for connecting the other of the two terminals of the first capacitor to ground potential. The at least one integrator also has a second input stage connected parallel ot the first input stage including a series circuit of a fifth switch, a second capacitor having two terminals and a sixth switch, a seventh switch for connecting one of the two terminals of the second capacitor to ground potential, and an eighth switch for connecting the other of the two terminals of the second capacitor to ground potential. Only one integrator with high amplication which is disposed in an outer feedback loop of the sigma-delta modulator, may have the second input stage. The first and second capacitors and the switches of the first and second input stages may be substantially identically set up and the switches have various switching phases.

REFERENCES:
patent: 4232302 (1980-11-01), Jabatich
patent: 4622536 (1986-11-01), Shih et al.
patent: 4633223 (1986-12-01), Senderowicz
patent: 4677422 (1987-06-01), Naito
patent: 4706066 (1987-11-01), Dijkmans
patent: 4918454 (1990-04-01), Early et al.
patent: 4939516 (1990-07-01), Early
patent: 4972436 (1990-11-01), Halim et al.
patent: 4999634 (1991-03-01), Brazdrum et al.
patent: 5001725 (1991-03-01), Senderowicz et al.
Proceedings of the IEEE 1988 Customs Integrated Circuits Conference, Rochester, N.Y., May 16-19, 1988, pp. 21.3.1-21.3.4, IEEE, New York, U.S.; S. R. Norsworthy et al.: "A 13-Bit, 160 kHz sigma-delta A/D Converter for ISDN".
Patent Abstracts of Japan, Vol. 9, No. 150 (E-324) (1873), Jun. 25, 1985; & JP-A-60 31 315 (Nippon Denki K.K.), Feb. 2, 1985.
Electronics Letters, Feb. 17, 1983, vol. 19, No. 4, G. Lainey et al.: "Switched-Capacitor Second-Order Noise-Shaping Coder", pp. 149-150.

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