Predistortion circuit, low-distortion power amplifier, and...

Details Predistortion circuit, low-distortion power amplifier, and... Predistortion circuit, low-distortion power amplifier, and...

2006-07-25

2006-07-25

Choe, Henry (Department: 2817)

Amplifiers

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

C375S297000

Reexamination Certificate

active

07081795

ABSTRACT:
An amplitude frequency characteristic adjustment circuit106is provided downstream of and connected to a distortion generation circuit105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit106, and then their amplitudes and phases are adjusted by a vector adjustment circuit107. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.

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