Amplifiers – With amplifier bypass means
Patent
1996-02-12
1997-11-25
Mullins, James B.
Amplifiers
With amplifier bypass means
330 52, H03F 132
Patent
active
056916680
ABSTRACT:
A feedforward amplifier comprises a first feedforward circuit and a second feedforward circuit. The first feedforward circuit detects the distortion component of the output of a main amplifier through a first distortion detection circuit, and inserts the detected distortion component into the output signal of the main amplifier in a first distortion cancellation circuit to cancel the distortion component. The second feedforward circuit detects the distortion component of the output of the first feedforward circuit through a second distortion detection circuit, and inserts the detected distortion component into the output signal of the first feedforward circuit in a second distortion cancellation circuit, to perform distortion cancellation over a wide range of frequencies.
REFERENCES:
patent: 5117197 (1992-05-01), Hsu et al.
patent: 5444418 (1995-08-01), Mitzlaff
patent: 5477187 (1995-12-01), Kobayashi et al.
Adachi Hisashi
Kosugi Hiroaki
Kugou Shin'ichi
Nagao Kazuo
Yoshikawa Yoshishige
Matsushita Electric - Industrial Co., Ltd.
Mullins James B.
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