Output stage for an operational amplifier

Details Output stage for an operational amplifier Output stage for an operational amplifier

1989-04-07

1990-05-01

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330270, 330273, H03F 326, H03F 345

Patent

active

049222082

ABSTRACT:
In an output stage of an operational amplifier comprising first and second NPN output transistors a circuit is coupled between the positive supply conductor and the collector of the first NPN transistor for providing a boosted base current drive thereto as a function of the load current sourced from the emitter of the first transistor to the output of the operational amplifier. The circuit senses the collector current flowing through the first transistor for increasing the base current drive thereto as the collector current increases.

REFERENCES:
patent: 4499431 (1985-02-01), Otala

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