Amplifiers – Hum or noise or distortion bucking introduced into signal...
Reexamination Certificate
2007-02-20
2007-02-20
Nguyen, Khanh Van (Department: 2817)
Amplifiers
Hum or noise or distortion bucking introduced into signal...
C330S136000
Reexamination Certificate
active
10488963
ABSTRACT:
A distortion compensating circuit for a power amplifier attains raised compensating accuracy with shorter convergence time by accurately and quickly generating a distortion compensation signal for pre-distortion. An error signal representing the difference between the input and output signals of the power amplifier is generated. From the error signal and the input signal, the coefficients of the third-order intermodulation distortion, fifth-order intermodulation distortion and seventh-order intermodulation distortion are calculated. According to these coefficients, a distortion compensating signal which is characteristically opposite in phase and gain to the intermodulation distortions is generated.
REFERENCES:
patent: 6552609 (2003-04-01), Hamada et al.
patent: 6657493 (2003-12-01), Ode et al.
patent: 6717464 (2004-04-01), Fudaba et al.
patent: 1 089 428 (2001-04-01), None
patent: 2001-168774 (2001-06-01), None
patent: 00/74232 (2000-12-01), None
patent: 01/20775 (2001-03-01), None
Seto et al., “An Adaptive Predistortion Method for Linear Power Amplifiers,” Eijogakugiho (ITE Technical Report), vol. 24, No. 79, pp. 91-96, Institute of Image Information and Television Engineers, Tokyo, JP, Dec. 15, 2000.
Hirose Nobuo
Sano Seiichi
Tomaru Fumihito
Tsukamoto Nobuo
Hitachi Kokusai Electric Inc.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
Nguyen Khanh Van
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