Operational amplifier

Details Operational amplifier Operational amplifier

1982-07-02

1985-06-18

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330107, 330260, 330294, H03F 134, H03F 345

Patent

active

045243271

ABSTRACT:
An operational amplifier which comprises a first amplifying circuit; a second amplifying circuit which is connected to the first amplifying circuit and carries out inverting amplification; a third amplifying circuit which is connected to the second amplifying circuit, carries out noninverting amplification and has a gain of substantially 1; a first feedback circuit which is connected between the output and input terminals of the second amplifying circuit and carries out phase-compensation; and a second feedback circuit which is connected between the output terminal of the third amplifying circuit and the input terminal of the second amplifying circuit, and carries out phase-compensation.

REFERENCES:
patent: 4335355 (1982-06-01), Haque
patent: 4371843 (1983-02-01), Fang et al.
Yusuf A. Haque et al., "A Two Chip PCM Voice CODEC With Filters", IEEE J. Solid-State Circuits, vol. SC-14, pp. 961-969, Dec. 1979.

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