发明授权
- 专利标题： Power amplifier bias control circuit and method
- 专利标题（中）： 功率放大器偏置控制电路及方法
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申请号： US315540申请日： 1994-09-30
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公开(公告)号： US5442322A公开(公告)日： 1995-08-15
- 发明人: Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
- 申请人： Richard K. Kornfeld , Ana L. Weiland , Mitsunari Okazaki
- 申请人地址： JPX JPX
- 专利权人： Alps Electric Co.,Qualcomm Inc.
- 当前专利权人： Alps Electric Co.,Qualcomm Inc.
- 当前专利权人地址： JPX JPX
- 主分类号： H03F1/02
- IPC分类号： H03F1/02 ; H03F1/30 ; H03F3/20 ; H03G3/30
摘要：
A control circuit for a multi-stage power amplifier (such as in a portable radio transmitter) compensates for fluctuations in ambient temperature, load, signal level and power supply voltage, The control voltage is set by comparing a biasing level which is related to the amplifier input signal level to a voltage proportional to the power supply current of the last stage of the amplifier. The control voltage resulting from the comparison establishes the operating point of the last stage of the power amplifier.
公开/授权文献
- US4915665A Model airplane interchangeable between high wing and low wing 公开/授权日：1990-04-10