Threshold detector circuitry, as for PCM repeaters

Details Threshold detector circuitry, as for PCM repeaters Threshold detector circuitry, as for PCM repeaters

1975-01-29

1976-06-08

Claffy, Kathleen H.

179 15AD, 328146, 328164, H04B 336

Patent

active

039625494

ABSTRACT:
Successively larger fractions of a first composite signal are compared with an entire second composite signal to obtain control signals. The composite signals comprise similar direct components with push-pull a-c signals superimposed thereon. One of these control signals may be used to standardize the average amplitude of the push-pull signals by causing them to be attenuated when they exceed a given amplitude, and at least one other, for controlling the synchronous regeneration of the a-c signals. The invention is useful for PCM repeaters in telephone cables.

REFERENCES:
patent: 3384711 (1968-05-01), Boxall
patent: 3633045 (1972-01-01), Nordling
patent: 3735152 (1973-05-01), Oda
patent: 3737585 (1973-06-01), Ghosh
patent: 3777268 (1973-12-01), Cleobury et al.
patent: 3873775 (1975-03-01), Chown

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