Output stage for an operational amplifier

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

1984-03-26

1985-11-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330289, 330294, H03F 330, H03F 130

Patent

active

045531064

ABSTRACT:
An operational amplifier includes an input stage, an output stage including first, second and third NPN output transistors, and an intermediate stage. The output stage is driven by a thermal current having a positive temperature coefficient so as to keep the gain of the output stage substantially constant over temperature. Thus, the amplifiers Miller loop stability will also remain substantially constant over temperature.

REFERENCES:
patent: 3693107 (1972-09-01), Long
patent: 4403200 (1983-09-01), Davis

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