发明名称 |
CONTINUOUS CLOSED-LOOP POWER CONTROL SYSTEM INCLUDING MODULATION INJECTION IN A WIRELESS TRANSCEIVER POWER AMPLIFIER |
摘要 |
A single continuous closed-loop power control feedback system (300) provides seamless power control for a power amplifier (160) and also enables an AM signal to be injected into the power amplifier through the power amplfiers' control port. The AM signal is developed by an I/Q modulator (146) and supplied to a comparator (268) located in the power control loop. By using leakage from the power amplifier as feedback to a phase locked loop (220) during initial power amplifier power ramp-up, the single continuous closed-loop power control system provides continuous feedback to the phase locked loop during the entire power amplification ramp-up period and eliminates the need for multiple feedback loops.
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申请公布号 |
WO02060088(A1) |
申请公布日期 |
2002.08.01 |
申请号 |
WO2001US45730 |
申请日期 |
2001.11.02 |
申请人 |
CONEXANT SYSTEMS, INC. |
发明人 |
ROZENBLIT, DMITRIY;DAMGAARD, MORTEN;FAGG, RUSSELL, J.;DOMINO, WILLIAM, J. |
分类号 |
H03G3/30;H03F1/02;H04B1/04;H04B7/005;(IPC1-7):H04B7/00;H04B1/00;H04B1/38 |
主分类号 |
H03G3/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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