Invention Grant
- Patent Title: Feedforward amplifier, communication apparatus, feedforward amplification method, program and medium
- Patent Title (中): 前馈放大器，通信装置，前馈放大方法，程序和介质
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Application No.: US10433582Application Date: 2001-11-30
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Publication No.: US06940346B2Publication Date: 2005-09-06
- Inventor: Masayuki Miyaji , Kaoru Ishida , Toshimitsu Matsuyoshi , Hisashi Adachi , Seiji Fujiwara
- Applicant: Masayuki Miyaji , Kaoru Ishida , Toshimitsu Matsuyoshi , Hisashi Adachi , Seiji Fujiwara
- Applicant Address: JP Osaka
- Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee: Matsushita Electric Industrial Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: RatnerPrestia
- Priority: JP2000-369147 20001204
- International Application: PCT/JP01/10469 WO 20011130
- International Announcement: WO02/50997 WO 20020627
- Main IPC: H03F1/32
- IPC: H03F1/32 ; H03F3/66 ; H03F1/26
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.
Public/Granted literature
- US20040075497A1 Feedforward amplifier, cummunication apparatus, feedforward amplifying method, program and medium Public/Granted day:2004-04-22
Information query
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