发明申请
- 专利标题: AMPLIFIER WITH GAIN EXPANSION STAGE
- 专利标题(中): 具增益放大器的放大器
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申请号: US12143669申请日: 2008-06-20
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公开(公告)号: US20090315621A1公开(公告)日: 2009-12-24
- 发明人: Chiewcharn Narathong , Sankaran Aniruddhan , Wenjun Su
- 申请人: Chiewcharn Narathong , Sankaran Aniruddhan , Wenjun Su
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM INCORPORATED
- 当前专利权人: QUALCOMM INCORPORATED
- 当前专利权人地址: US CA San Diego
- 主分类号: H03F1/14
- IPC分类号: H03F1/14 ; H03F3/68
摘要:
Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or a combination of the two. In an exemplary embodiment, both the gain compression stage and gain expansion stage are provided with a replica current biasing scheme to ensure stable biasing current over variations in temperature, process, and/or supply voltage. Further disclosed is an output voltage biasing scheme to set the DC output voltage to ensure maximum linear operating range.
公开/授权文献
- US08035443B2 Amplifier with gain expansion stage 公开/授权日:2011-10-11
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