Amplifiers – With pilot frequency control means
Reexamination Certificate
2005-09-06
2005-09-06
Mottola, Steven J. (Department: 2817)
Amplifiers
With pilot frequency control means
C330S151000
Reexamination Certificate
active
06940346
ABSTRACT:
The conventional feedforward amplifier is unable to suppress distortion components efficiently. The present invention provides a feedforward amplifier wherein the vector adjustor is adjusted so that (1) suppression is performed on only the distortion component generated within a predetermined frequency range out of the range of frequencies to be suppressed in which distortion components to be suppressed occur or (2) the suppression of the distortion component generated within the predetermined frequency range is greater than the suppression of the distortion component generated within the frequency range other than the predetermined frequency range out of the range of frequencies to be suppressed, and the pre-distortion circuit is adjusted so that at least the distortion component generated within the frequency range other than the predetermined frequency range is suppressed.
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International Search Report for PCT Application No. PCT/JP01/10469 dated Mar. 8, 2002.
Form PCT/ISA/210 English translation of above ISR dated Mar. 8, 2002.
European Search Report corresponding to application No. EP 01-27-1109 dated Oct. 5, 2004.
Adachi Hisashi
Fujiwara Seiji
Ishida Kaoru
Matsuyoshi Toshimitsu
Miyaji Masayuki
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