Operation amplifier circuit having digital driving circuitry...

Details Operation amplifier circuit having digital driving circuitry... Operation amplifier circuit having digital driving circuitry...

2007-09-18

2007-09-18

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

C330S251000

Reexamination Certificate

active

10908989

ABSTRACT:
An operational amplifier circuit includes an analog driving circuitry and a digital driving circuitry. The analog driving circuitry is coupled to a load and drives the load according to an input signal. The digital driving circuitry includes a code comparator, a sourcing unit, and a sinking unit. The code comparator compares a reference code with codes corresponding to the input signal and generates a first control signal and a second control signal accordingly. The sourcing unit is coupled to the code comparator and the load, and sources a first current to the load according to the first control signal. The sinking unit is coupled to the code comparator and the load, and sinks a second current from the load according to the second control signal.

REFERENCES:
patent: 4390846 (1983-06-01), Cragfors et al.
patent: 5783956 (1998-07-01), Ooishi
patent: 6710617 (2004-03-01), Humphrey
patent: 509886 (2002-11-01), None

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