Operational amplifier

Details Operational amplifier Operational amplifier

1987-09-24

1989-04-11

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330253, H03F 345

Patent

active

048209988

ABSTRACT:
An operational amplifier of the folded-cascode type with: push-pull output terminals; a differential-input transistors; a load impedance in the form of a cascode current source coupled to the differential-input, and a dynamic common-mode negative feedback. A current source transistor in the cascode current source is incorporated into the dynamic common-mode negative feedback.

REFERENCES:
patent: 4656437 (1987-04-01), Saari
"A High-Performance Micropower Switched-Capacitor Filter", Castello et al., IEEE Journal of Solid-State Circuits, vol. SC-20, No. 6, Dec. 1985, pp. 1122-1132.
"CMOS Video Filters Using Switched Capacitor 14-MHz Circuits", Matsui et al., IEEE Journal of Solid-State Circuits, vol. SC-20, No. 6, Dec. 1985, pp. 1096-1102.
"80 MHz Low Offset CMOS Fully Differential and Single-Ended OP Amps", Ribner et al., IEEE 1985 Custom Integrated Circuits Conference, pp. 174-177.
"Power-Supply Rejection in Differential Switched-Capacitor Filters", De La Plaza et al. IEEE J. S. S. Circuits, vol. SC-19, No. 6, Dec. 1984, pp. 912-918.
"Precision Analog Components", Choi et al., IEEE International Solid-State Circuits Conference 1983, pp. 246, 247 and 314.
"A Family of Differential NMOS Analog Circuits for a PCM Codec Filter Chip", Senderowicz et al., IEEE Journal of Solid-State Circuits, vol. SC-17, No. 6, Dec. 1982.

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