ANALOG TELEPHONE SET

ANALOG TELEPHONE SET

PURPOSE:To realize the prevention of deterioration in a signal level and the reduction of unbalance in side tone at the time of simultaneously using plural branch-connected telephone sets. CONSTITUTION:A hybrid circuit 7, a receiving amplifier 8 and a transmitting output stage 12 are provided in a c...

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1. Verfasser: YAMANE HIROTAKA
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
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creator YAMANE HIROTAKA
description PURPOSE:To realize the prevention of deterioration in a signal level and the reduction of unbalance in side tone at the time of simultaneously using plural branch-connected telephone sets. CONSTITUTION:A hybrid circuit 7, a receiving amplifier 8 and a transmitting output stage 12 are provided in a call circuit 6 which is connected to a hook switch 3 and a branch detecting circuit 13 which controls the transmitting output stage 12 of the call circuit 6 is provided. When the branch detecting circuit 13 detects the on-hook of another telephone set which is branch-connected, the impedance of the transmitting output stage 12 which shoulders the impedance as the telephone set is controlled.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
title ANALOG TELEPHONE SET
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