Delta modulated communication system

Details Delta modulated communication system Delta modulated communication system

1983-11-04

1985-11-19

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

332 11D, H03K 1322

Patent

active

045546711

ABSTRACT:
A logarithmic delta modulated transmission system, comprising a logarithmic A/D converter (12) for outputting binary signals (16, 18) indicative of the polarity and size of the difference between an analog signal to be transmitted and a reconstructed signal (44), selection circuitry (22, 38) for sampling the polarity signal at a clock rate (20) and the size signals at a subharmonic (26, 34) of the clock rate, and outputting digital signals to be transmitted, and a logarithmic delta demodulator (42) for providing the reconstructed signal from the transmitted signals. The sizes of the difference are set to be logarithmic.

REFERENCES:
patent: 3414818 (1968-12-01), Reidel
patent: 3497624 (1970-02-01), Brolin
patent: 3500441 (1970-03-01), Brolin
patent: 3806806 (1974-04-01), Brolin
patent: 4438523 (1984-03-01), Brandl

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