RF CIRCUIT WITH CONTROL UNIT TO REDUCE SIGNAL POWER UNDER APPROPRIATE CONDITIONS

摘要

RF circuit is disclosed a power amplifier for generating an RF output signal, the RF output signal detector to produce a detector signal representative of the power (119), and includes a low power voltage state offset unit 130 to generate a signal indicating the offset. Power of the RF output signal is reduced at least in part by a control signal that reflects the combination of the detector signal and the offset signal. The circuit may include a transmitter 140 that provides the RF input signal to a power amplifier. The transmitter can receive the control signal and control the power of the RF input signal based on the control signal. The detector can generate a control current representing the RF output signal power. The offset unit generates an offset signal based on a difference between the supply voltage and the nominal supply voltage value.