Transmission circuit for an electronic telephone set

Details Transmission circuit for an electronic telephone set Transmission circuit for an electronic telephone set

1983-01-28

1985-05-21

George, Keith E.

179 81B, H04M 160

Patent

active

045188289

ABSTRACT:
A transmission circuit for an electronic telephone set has a transmit circuit which as far as direct current is concerned is connected in parallel with the series arrangement of a logic circuit, a current source and a receive circuit. This enables the voltage space of the transmit circuit to be equal to the line voltage so that a maximum transmit level can be achieved.

REFERENCES:
patent: 4309573 (1982-01-01), Grantland et al.
patent: 4332984 (1982-06-01), Davis et al.
patent: 4376876 (1983-03-01), Versteeg et al.
patent: 4394542 (1983-07-01), Hara et al.
patent: 4400588 (1983-03-01), Stobbs et al.
patent: 4406926 (1983-09-01), Duncan

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