Telephone handset amplifier circuit

Details Telephone handset amplifier circuit Telephone handset amplifier circuit

H - Electricity

04

M

379/82

H04M 1/60 (2006.01)

Patent

CA 1179798

TELEPHONE HANDSET AMPLIFIER CIRCUIT Abstract of the Disclosure A rocker switch is operated by the handset user to vary the impedance of a FET. The FET impedance varies in proportion to the duration of operation of the switch. The handset receiver "volume" increases or decreases in propor- tion to the FET impedance. An electret condensor micro- phone stabilizes the receiver supply voltage and provides improved transmitter linearity and low distortion.

382503

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