Push-pull output stage

Details Push-pull output stage Push-pull output stage

1981-04-22

1983-09-20

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330272, 330274, 330275, H03F 330

Patent

active

044059027

ABSTRACT:
The invention provides an improved class-B push-pull output stage comprising a first and a second output transistor of a first conductivity type, which stage is provided with a control loop for driving the second transistor in phase opposition as a function of the drive of the first transistor. Said control loop is adapted so that a stable quiescent-current setting is obtained and that the effect of poor high-frequency properties of a third transistor of a conductivity type opposite to the first conductivity type, which transistor is necessarily included in the control loop, is eliminated, so that a wide frequency range is obtained.

REFERENCES:
patent: 4300103 (1981-11-01), van de Plassche

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