Sigma-delta modulator

Details Sigma-delta modulator Sigma-delta modulator

1991-06-10

1992-04-07

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

375 28, H03M 302

Patent

active

051032287

ABSTRACT:
1-Bit signma-delta modulator having a loop filter (5,6,8), a first negative feedback loop (13,7,8) and a second negative feedback loop (14,4,5,6,8). The filter sections 5 and 8 are passive filter elements and filter section 6 is a high-gain active filter element. A circuit of this type makes a very high clock rate possible in the decision switch 10.

REFERENCES:
patent: 4467291 (1984-08-01), Roza
patent: 4772871 (1988-09-01), Suzuki et al.
patent: 4947171 (1990-08-01), Pfeifer et al.

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