Aural annunciator circuit for a receiver

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

H - Electricity

04

B

H04B 1/16 (2006.01) H04M 11/02 (2006.01) H04M 19/04 (2006.01)

Patent

CA 2127269

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.

L'invention se rapporte à un circuit avertisseur auditif pour récepteur radio et pour émetteur-récepteur le renfermant. Le circuit avertisseur est destiné à générer un signal auditif lorsqu'un signal est transmis au récepteur d'une manière analogue au circuit de sonnerie d'un téléphone classique (606). Le signal auditif est à un niveau d'amplitude relativement élevé lorsque le récepteur dans lequel le circuit avertisseur auditif est réalisé a une configuration fermée, et le signal auditif est à un niveau d'amplitude relativement faible lorsque le récepteur a une configuration ouverte (618).

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