TELEPHONE CIRCUIT

TELEPHONE CIRCUIT

An integrated circuit for a telephone instrument provides the basic (POT) service requirement. The circuit has means whereby the transmit and receive channels may be fed via controlled attenuators incorporated in an ancillary circuit to provide hands-free operation. The circuit also includes a curre...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ANDREW PAUL LEFEVRE, EDWARD JOHN WEMYSS WHITTAKER, PETER FRED BLOMLEY, KENNETH ALEXANDER MANSON ARTON
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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Beschreibung
Zusammenfassung:An integrated circuit for a telephone instrument provides the basic (POT) service requirement. The circuit has means whereby the transmit and receive channels may be fed via controlled attenuators incorporated in an ancillary circuit to provide hands-free operation. The circuit also includes a current limited power supply whereby connection to a further ancillary circuit including an audio amplifier may be effected to provide loudspeaker operation.