Low voltage IC for voice operated transceiver

Details Low voltage IC for voice operated transceiver Low voltage IC for voice operated transceiver

1990-04-23

1993-03-09

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 83, 381 46, H04B 146

Patent

active

051932172

ABSTRACT:
A portable transceiver with a transmit/receive switch which includes an audio amplifier, level detector and comparator all direct coupled and included on a single integrated chip. The comparator includes one input that has a slow attack time and a fast decay time for differentiating between slow changing background noise and fast bursts of voice so that the transceiver is voice operated.

REFERENCES:
patent: 3169221 (1965-02-01), Franchi
patent: 3397401 (1968-08-01), Winterbottom
patent: 3944736 (1976-03-01), Shepard
patent: 3962553 (1976-06-01), Linder et al.
patent: 4860359 (1989-08-01), Eicher

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