Operational amplifier circuit having adjustable bias current

Details Operational amplifier circuit having adjustable bias current Operational amplifier circuit having adjustable bias current

2007-10-23

2007-10-23

Mottola, Steven J. (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

Reexamination Certificate

active

11160039

ABSTRACT:
An operational amplifier circuit includes an operational amplifier, a bias current provider, and a control circuitry. The operational amplifier drives a load according to an input signal. The bias current provider is coupled to the operational amplifier and provides a bias current to the operational amplifier. The control circuitry is coupled to the bias current provider and controls the bias current provider to adjust the bias current according to an operating status of the operational amplifier circuit.

REFERENCES:
patent: 6710617 (2004-03-01), Humphrey
patent: 7154331 (2006-12-01), Zaguri
patent: 496990 (2002-08-01), None
“FETs As Voltage-Controlled Resistors” Siliconix AN105 Mar. 10, 1997 pp. 1-6.

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