Amplifier and method for canceling nonlinearity in amplifier

Details Amplifier and method for canceling nonlinearity in amplifier Amplifier and method for canceling nonlinearity in amplifier

2005-09-06

2005-09-06

Mottola, Steven J. (Department: 2817)

Amplifiers

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

C330S295000, C330S311000

Reexamination Certificate

active

06940350

ABSTRACT:
An amplifier including an amplifier transistor that operates in an active region has main current flowing therethrough according to input voltage, and a linear transistor that is driven by offset positive-polarity input voltage to operate in a linear region and has auxiliary current flowing therethrough. The main current and auxiliary current are added to become output current. The offset positive-polarity voltage corresponds to the sum of AC component of the input voltage and an offset DC voltage. Here, a transistor stacked on the linear transistor is coupled to the amplifier transistor to secure the linear region operation of the linear transistor. The stacked transistor is driven by a voltage having polarity opposite to that of the input voltage.

REFERENCES:
patent: 6204728 (2001-03-01), Hageraats
patent: 6392492 (2002-05-01), Yuan
patent: 6489827 (2002-12-01), Sutardja
patent: 6710662 (2004-03-01), Wang

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