Variable loop telephone transmission circuit

Details Variable loop telephone transmission circuit Variable loop telephone transmission circuit

H - Electricity

04

M

379/80

H04M 1/20 (2006.01) H04M 1/58 (2006.01)

Patent

CA 1134083

TITLE VARIABLE LOOP TELEPHONE TRANSMISSION CIRCUIT ABSTRACT OF THE INVENTION A subscriber station telephone circuit having a multiwinding transformer connected in a bridge con- figuration to couple the transmitter to the line and the balancing impedance in opposite phase. The receiver is magnetically coupled by the transformer so as to receive practically no side tone during transmission. A varistor is employed as a regulator to control receiver signals.

341781

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