Aural annunciator circuit for a receiver

Details Aural annunciator circuit for a receiver Aural annunciator circuit for a receiver

1992-11-27

1995-04-04

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

Having particular housing or support of a transceiver

455 89, 4551561, 379375, 379418, H04B 138

Patent

active

054045827

ABSTRACT:
An aural annunciator circuit for a radio receiver and a radio transceiver incorporating such. The annunciator circuit is operative to generate an aural signal when a signal is transmitted to the receiver in a manner analogous to telephonic ringer circuitry of conventional telephonic apparatus. The aural signal is of a signal level of a relatively high magnitude when the receiver in which the aural annunciator circuit is embodied is configured in a closed configuration and the aural signal is of a relatively low magnitude when the receiver is configured in an open configuration.

REFERENCES:
patent: 4523058 (1985-06-01), Stevens et al.
patent: 4680787 (1987-07-01), Marry
patent: 4920557 (1990-04-01), Umemoto
patent: 5172408 (1992-12-01), Petty et al.
patent: 5224151 (1993-06-01), Bowen et al.

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