发明授权
US07183844B2 Multi-state load switched power amplifier for polar modulation transmitter 有权
用于极性调制发射机的多状态负载开关功率放大器

Multi-state load switched power amplifier for polar modulation transmitter
摘要:
A polar modulation power amplifier circuit includes a control circuit (101) to determine and provide a load selection signal (127), wherein the load selection signal (127) is determined responsive to a requested power signal (119). A power amplifier (113) is responsive to a power control signal (141), for amplifying an RF signal (139) to produce an amplified signal (145), having an output power level. A variable impedance matching circuit (117) is responsive to the load selection signal (127), to adjust a relationship between the control level and the output power level, to produce a range-adjusted amplified signal (147).
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