Push-pull amplifier circuit

Details Push-pull amplifier circuit Push-pull amplifier circuit

1981-04-13

1983-01-25

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330270, H03F 326

Patent

active

043706231

ABSTRACT:
An amplifier arrangement is provided which comprises first and second biasing power supply circuits, a push-pull amplifier comprising a pair of transistors, a DC amplifier having a non-inverting input terminal connected to a junction point at which one half of a predetermined potential fed from the first biasing power supply circuit is applied and an inverting input terminal connecting a feedback loop through which the output the amplifier is fedback, a second biasing power supply circuit having a junction point at which the output of the DC amplifier is applied, and means responsive to an output of the DC amplifier for applying either of the first and second predetermined potentials fed from the first and second biasing circuits in accordance with the amount of feedback from the output of the push-pull amplifier to produce an output signal showing a biasing current, whereby the output signal is applied to each base of the push-pull transistors so as to balance the half potential of the first biasing power supply circuit with the potential at the output of the push-pull amplifier.

REFERENCES:
patent: 3772606 (1973-11-01), Waehner

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