Invention Grant
US08571497B1 Closed-loop power control in conjunction with adaptive power amplifier linearization 有权
结合自适应功率放大器线性化的闭环功率控制

Closed-loop power control in conjunction with adaptive power amplifier linearization
Abstract:
A radio frequency transmitting system includes a programmable amplifier, a power amplifier, a power detector, and a calibration module. The programmable amplifier is configured to amplify an input signal to generate an amplified signal. The power amplifier is configured to output a transmit signal in response to the amplified signal. The transmit signal has a transmit power. The power detector is configured to generate a power measurement in response to the transmit power. The calibration module is configured to implement a plurality of feedback loops to adjust a gain of the programmable amplifier in response to a difference between the power measurement and a desired transmit power. The calibration module is configured to select one of the plurality of feedback loops in response to the desired transmit power.
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