High accuracy delta modulator

Details High accuracy delta modulator High accuracy delta modulator

1980-12-12

1983-02-01

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

375 26, 375 28, H03K 1322

Patent

active

043718507

ABSTRACT:
A delta modulation circuit features a variable input voltage which is compared periodically with a quantized previous signal sample, resulting in a digitized output. The digitized output of the comparison controls the selective operation of a switching control circuit which, in turn, is clocked at a predetermined rate. The switching control circuit selectively applies a positive or a negative reference signal to the input of the quantizer from a common voltage reference source. A quantum charge is derived from the signal reference source then, through selective switching, that quantized charge is transferred in a positive or a negative direction to the input of a quantized charge memory device, resulting in the quantized last signal sample.

REFERENCES:
patent: 3867650 (1975-02-01), Baldwin
patent: 4305050 (1981-12-01), DeFreitas

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