Bridge amplifier

Details Bridge amplifier Bridge amplifier

H - Electricity

04

M

379/72, 379/82

H04M 1/60 (2006.01)

Patent

CA 1149980

ABSTRACT OF THE DISCLOSURE: A four-transistor bridge amplifier is adapted for use as a bidirectional speech amplifier between a telephone line and an electronic telephone subscriber's instrument. The amplifier is powered from the line and includes two-transistorsections, one or other of which functions dependent on line polarity. The output of the amplifier to the subscriber instrument is taken across a resistor connected between the transistors such that output always has the same relative polarity whatever the line polarity.

323782

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