Electronic hybrid circuits

Details Electronic hybrid circuits Electronic hybrid circuits

H - Electricity

04

L

379/68, 340/98

H04L 5/14 (2006.01) H04B 1/58 (2006.01)

Patent

CA 1157125

ELECTRONIC HYBRID CIRCUITS Abstract of the Disclosure A hybrid circuit has its 4-wire path input coupled via a resistor to a 2-wire port and a non-inverting input of a differential amplifier, and via an active stage and another resistor to an inverting input of the differential amplifier, whose output is coupled to a 4-wire path output of the circuit and via a resistor to the inverting input. The active stage includes impedances, constituting a feedback arrangement or an input potential divider arrangement of an amplifier, which enable the hybrid circuit sidetone to be controlled or made substantially zero, without affecting the circuit's receive gain, even when the circuit is connected to a 2-wire path having a complex impedance. - i -

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