Operational amplifier

Details Operational amplifier Operational amplifier

1984-07-19

1987-02-17

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330253, 330255, H03F 345

Patent

active

046442910

ABSTRACT:
An operational amplifier has a bias stage, a sampled differential stage, and a push-pull cascode stage. Unlike the conventional operational amplifier, the sampled differential stage is adopted in place of a differential stage has switches and capacitors. An input signal is transferred to the push-pull cascode stage through the capacitors in cooperation with the switches operated in response to clock signals phase-shifted by 180.degree., thereby applying optimal bias voltages to the push-pull cascode stage and providing a wide frequency bandwidth.

REFERENCES:
"High Voltage Gain CMOS OTA for Micropower SC Filters", vol. 17, No. 4, 19th Feb. 1981, pp. 160-162, Electronics Letters.

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