Patent ID: 7650122

Claim:
A power control circuitry for controlling the output power level (P out ) of a signal (x(t)) to be transmitted at the output port of a variable-gain power amplifier, said power control circuitry comprising a current sense loop with an integrated comparator stage having a first input port supplied with a reference signal (V ref ) representing the nominal power level (P ref ) for the output power (P out ) and a second input port supplied with a signal from a current sensor which is placed in the power supply line of a variable-gain power amplifier, wherein the output signal of said comparator stage is fed to the power control input port of the variable-gain power amplifier, and further comprising power sensing means for detecting the power of a feedback signal (V PD ) representing the reflected wave of the signal (x(t)) to be transmitted, and a feedback loop for feeding said reference signal (V ref ) derived from said feedback signal (V PD ) and a reference ramp signal (V ramp ) to the first input port of the comparator stage in order to increase the radiated power (P out ) of said signal (x(t)) in case a transmit antenna is mismatched to the variable-gain power amplifier.