1976-06-28
1977-12-27
Cooper, William C.
179 81B, H04B 336
Patent
active
040656462
ABSTRACT:
In a two-wire bidirectional telephone transmission line, a power converter and a directional threshold detector form in combination an impedance transparent bilateral voice-signal controller which can supply stable voice-switched gain to a dominant signal originating from either direction and a simultaneous, equal loss to any signals propagating from the other direction without separating the respective signals.
REFERENCES:
patent: 3359378 (1967-12-01), Skeer
patent: 3448217 (1969-06-01), Leman et al.
patent: 3706862 (1972-12-01), Chambers
patent: 3946169 (1976-03-01), Miya
patent: 3989906 (1976-11-01), Kiko
Mitra, "Analysis and Synthesis of Line Active Networks", 1969, John Wiley & Sons, Inc., Chapter 2, p. 43.
Bell Telephone Laboratories Incorporated
Cooper William C.
Myers Randall P.
Newman Harry L.
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