Push-pull output circuit method

Details Push-pull output circuit method Push-pull output circuit method

1996-11-22

1998-06-09

Mottola, Steven J.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330273, H03F 326

Patent

active

057641056

ABSTRACT:
A push-pull output circuit includes first and second transistors each having a base coupled to a first conductor coupled to respond to an input signal. An emitter of the first transistor is coupled by a first resistor to a first supply voltage conductor and an emitter of the second transistor is coupled to the first supply voltage conductor. A pull-up circuit is coupled to the collectors of the first and second transistors. An output conductor is coupled to the collector of the second transistor. A third transistor having an emitter connected to the collector of the first transistor and a base and collector of a fourth transistor. A bias current source is coupled to the base of the third and fourth transistors to maintain the collector of the first transistor and the output conductor at substantially equal voltages.

REFERENCES:
patent: 4403200 (1983-09-01), Davis
patent: 4513251 (1985-04-01), Vyne
patent: 4538116 (1985-08-01), Vyne
patent: 4553106 (1985-11-01), Vyne
patent: 4709216 (1987-11-01), Davis
patent: 4922208 (1990-05-01), Susak et al.
patent: 5021746 (1991-06-01), Huynh

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