发明授权
- 专利标题: Systems and methods for power control in a multiple standard mobile transmitter
- 专利标题(中): 多标准移动发射机功率控制系统和方法
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申请号: US13310434申请日: 2011-12-02
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公开(公告)号: US08874051B2公开(公告)日: 2014-10-28
- 发明人: Dmitriy Rozenblit , Masoud Kahrizi , Jaleh Komaili , Rajasekhar Pullela , Shahrzad Tadjpour
- 申请人: Dmitriy Rozenblit , Masoud Kahrizi , Jaleh Komaili , Rajasekhar Pullela , Shahrzad Tadjpour
- 申请人地址: US MA Woburn
- 专利权人: Skyworks Solutions, Inc.
- 当前专利权人: Skyworks Solutions, Inc.
- 当前专利权人地址: US MA Woburn
- 代理机构: Knobbe, Martens, Olson & Bear, LLP
- 主分类号: H04B1/04
- IPC分类号: H04B1/04 ; H03G3/30
摘要:
A transmitter adjusts a transmitted power level by modifying a control input of a variable gain amplifier. A power amplifier control system includes an envelope extractor, an error extractor, and a feed-forward multiplier. The envelope extractor receives data signal inputs and computes the envelope of the combined signal. The error extractor generates an error signal as a function of the combined signal and the output power generated by the power amplifier. The feed-forward multiplier generates a modified error signal that is responsive to a function of the gain in a feedback path. A corresponding method for controlling a power level is also disclosed. In some embodiments, a transmit chain with a power control loop is used to adjust the transmit signal power applied at an input of a variable gain amplifier. A corresponding method for adjusting the transmit signal power level is also included.
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