- 专利标题: Variable gain amplifier
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申请号: US10210057申请日: 2002-08-02
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公开(公告)号: US06690232B2公开(公告)日: 2004-02-10
- 发明人: Takashi Ueno , Tadashi Arai , Tetsuro Itakura
- 申请人: Takashi Ueno , Tadashi Arai , Tetsuro Itakura
- 优先权: JP2001-295369 20010927
- 主分类号: H03F136
- IPC分类号: H03F136
摘要:
A variable gain amplifier device comprises a variable gain amplifier circuit which amplifies a difference between an input signal and a feedback signal to output an output signal, a feedback circuit which supplies the feedback signal to the variable gain amplifier circuit, and a controller which controls the variable gain amplifier circuit and the feedback circuit to decrease a cutoff frequency of the feedback circuit according to increase of a gain of the variable gain amplifier circuit or vice versa.
公开/授权文献
- US20030058048A1 Variable gain amplifier 公开/授权日:2003-03-27