Subscriber telephone set with amplified loudspeaker reception wi

Details Subscriber telephone set with amplified loudspeaker reception wi Subscriber telephone set with amplified loudspeaker reception wi

1985-12-24

1988-06-07

Ng, Jin F.

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

379387, H04M 160

Patent

active

047502037

ABSTRACT:
The invention relates to a subscriber telephone set with amplified reception loudspeaker.
To avoid distortion of the signals transmitted to this loudspeaker should the power supply of the line be insufficient, it is provided for the amplifier feeding this loudspeaker to have its gain controlled by a signal resulting from the measurement of current passing through a shunt regulator serving for supplying the amplifier.

REFERENCES:
patent: 3627952 (1971-12-01), Jacques
patent: 3691311 (1972-09-01), Wilson
patent: 4506114 (1985-03-01), Burgin
patent: 4608462 (1986-08-01), Blomely et al.

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