Operational amplifier output stage driven by a single ended gain

Details Operational amplifier output stage driven by a single ended gain Operational amplifier output stage driven by a single ended gain

1981-04-13

1983-10-11

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including combined diverse-type semiconductor device

330262, H03F 316, H03F 326

Patent

active

044095619

ABSTRACT:
In an operational amplifier, the output of the differential first stage is applied directly to the base electrode of a voltage gain transistor which in turn drives the remainder of the operational amplifier output stage. A pair of junction field-effect-transistors in conjunction with a diode and a current mirror circuit are employed to set the quiescent voltage at the circuit output. Both pull-up and pull-down transistors are employed to achieve the correct output in response to an input at the base of the voltage gain transistor.

REFERENCES:
patent: 4336504 (1982-06-01), Seki et al.

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