Operational amplifier with means for changing a resistance value

Details Operational amplifier with means for changing a resistance value Operational amplifier with means for changing a resistance value

1999-02-22

2000-10-24

Mottola, Steven J.

Amplifiers

Signal feedback

Variable impedance in feedback path varied by separate...

330292, 330136, H03G 320

Patent

active

061373567

ABSTRACT:
An operational amplifier includes an operational amplification means having a phase compensation capacitor, an active element connected in series to the phase compensation capacitor and having a variable resistance value, and a differential control means for changing the resistance value of the active element on the basis of a difference voltage between inputs to the operational amplification means, whereby stable operation and high-speed operation are realized.

REFERENCES:
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patent: 5444413 (1995-08-01), Kimura et al.
patent: 5455580 (1995-10-01), Sakuragi et al.
patent: 5481225 (1996-01-01), Lumsden et al.
patent: 5786730 (1998-07-01), Hadley
patent: 5880639 (1999-03-01), Sakuragi
Patent Abstracts of Japan, JP 06-216662, Aug. 1994.
Patent Abstracts of Japan, JP 63-136803, Jun. 1988.

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