Title: Threshold detector circuitry, as for PCM repeaters

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.

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Inventors: Zuk, Borys (New Brunswick, NJ, US)

Application Number: 545156
Filing Date: 1975-01-29
Publication_date: 1976-06-08
Assignee: RCA Corporation (New York, NY)
Primary Class(es): 327/178 327/50, 327/165, 370/501, 375/214, 379/342
Other Classes:
US Patent Ref:

3384711	May, 1968	Boxall	178/70.
3633045	Jan, 1972	Nordling	328/164.
3735152	May, 1973	Oda	328/164.
3737585	Jun, 1973	Ghosh	179/15.
3777268	Dec, 1973	Cleobury et al.	179/15.
3873775	Mar, 1975	Chown	179/15.

Other Refs:
Primary Examiner: Claffy, Kathleen H.
Assistant Examiner: Myers, Randall P.
Attorney: Christoffersen; H., Cohen; S., Limberg; A. L.