Press-to-talk transceiver

Details Press-to-talk transceiver Press-to-talk transceiver

1976-08-18

1977-11-29

Griffin, Robert L.

325 18, H04B 144

Patent

active

040607658

ABSTRACT:
A press-to-talk transceiver which emits a side tone of the signal being transmitted from the receiver of the handset of the transmitting operator during transmission, in which the transceiver is provided with a handset which has a receiver and a transmitter together as a unit, an antenna for transmission and reception, a signal processing circuit for the received signal which produces an audio signal from the received signal, an audio amplifier which amplifies the received or transmitted audio signal, an output circuit which supplies audio signals received, amplified by the audio amplifier, to the receiver of the handset, a signal processing circuit for the transmitted signal which produces a modulated signal from the audio signal to be transmitted amplified by the audio amplifier, a first press-to-talk switch which connects the antenna with the received signal processing circuit during reception and with the transmission signal processing circuit during transmission, a second press-to-talk switch which supplies received demodulated audio signals to the audio amplifier during reception and supplies audio signal being transmitted to the audio amplifier during transmission, and a side tone circuit which supplies a side tone of the transmitted signal amplified by the audio amplifier to the receiver of the handset.

REFERENCES:
patent: 2369193 (1945-02-01), Vrooman
patent: 2935605 (1960-05-01), Mathieu
patent: 3613003 (1971-10-01), Kubo et al.
patent: 3908094 (1975-09-01), Deluegue

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