Operational amplifier

Details Operational amplifier Operational amplifier

2007-11-06

2007-11-06

Choe, Henry (Department: 2817)

Amplifiers

Signal feedback

Frequency responsive feedback means

C330S294000

Reexamination Certificate

active

11267422

ABSTRACT:
An operational amplifier is described. The operational amplifier includes a first stage, a second stage, a third stage, and a fourth stage. The amplifier includes a nested transconductance-capacitance compensation configuration. The third stage includes class AB control mechanism. The fourth stage includes a class AB output stage.

REFERENCES:
patent: 5212455 (1993-05-01), Pernici et al.
patent: 5486790 (1996-01-01), Huijsing et al.
patent: 6208206 (2001-03-01), Leung et al.
patent: 6573790 (2003-06-01), Steensgaard-Madsen
patent: 6573791 (2003-06-01), Sridhar
“Multistage Amplifier Topologies with Nested Gm-C Compensation,” Fan You et al., IEEE Journal of Solid-State Circuits, vol. 32, No. 12, Dec. 1997, pp. 2000 to 2011.
“Low-Power Low-Voltage VLSI Operational Amplifier Cells,” Johan H. Huijsing, et al., IEEE Transactions on Circuits and Systems—I: Fundamental Theory and Applications, vol. 42, No. 11, Nov. 1995, pp. 841 to 852.

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