Amplifiers with negative capacitance circuits

Amplifiers – Hum or noise or distortion bucking introduced into signal...

Reexamination Certificate

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C330S302000

Reexamination Certificate

active

07863980

ABSTRACT:
Provided herein are amplifiers including negative capacitance circuits for reducing distortion resulting from a gate-source (or base-emitter) capacitance of output stages of such amplifiers. Such a negative capacitance circuit is connected in parallel with the gate-source (or base-emitter) capacitance of the output stage to shunt the gate-source (or base-emitter) capacitance and thereby reduce distortion. Also provided herein are methods for use with amplifiers including an output stage, including connecting a negative capacitance circuit in parallel with a base-emitter capacitance of the output stage.

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Nauta, B., “A CMOS Transconductance -C Filter Technique for Very High Frequencies,” IEEE J. of Solid-State Circuits, vol. 27, No. 2 (Feb. 1992), pp. 142-153.

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