Operational amplifier employing complementary field-effect trans

Details Operational amplifier employing complementary field-effect trans Operational amplifier employing complementary field-effect trans

1980-04-28

1982-06-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, 330257, H03F 345, H03F 316

Patent

active

043330584

ABSTRACT:
An operational amplifier includes first and second differential-input amplifiers of complementary conductivity type, each such differential-input amplifier including first and second transistors in long-tailed pair configuration having their drains connected to third and fourth transistors connected in current mirror amplifier configuration. An output amplifier includes a pair of complementary conductivity type transistors, each in common-source configuration, to supply signals to an output terminal. One output of the long-tailed pair and the output connection of the current mirror amplifier in the first differential-input amplifier directly connect to the gate of the first common-source amplifier. One output connection of the long-tailed pair and the output connection of the current mirror amplifier of the second differential-input amplifier directly connect to the gate input of the other common-source amplifier. A tail current supply for each long-tailed pair establishes its quiescent operating point.

REFERENCES:
patent: 3737797 (1973-06-01), Amemiya
patent: 3786179 (1974-01-01), Mouri et al.
patent: 4004245 (1977-01-01), Ochi et al.
patent: 4048575 (1977-09-01), Musa
patent: 4152663 (1979-05-01), Van de Sande
patent: 4267517 (1981-05-01), Iida et al.
patent: 4284958 (1981-08-01), Pryor et al.
patent: 4284959 (1981-08-01), Heagerty et al.
Linear Integrated Circuit D.A.T.A. Book, Edition 23, 1980, See A358, p. 188.

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