Patent ID: 7197325

Claim:
A transmission power control apparatus for a mobile terminal comprising: a mobile station control unit for controlling a power control of the mobile terminal; an intermediate frequency (IF) gain controller for adjusting IF gain of a transmission IF signal generated from a IF processor based on an IF gain control signal from the mobile station control unit; a power amplifier module (PAM) for amplifying the adjusted transmission IF signal; and a reference voltage control unit for adjusting reference voltage based on a transmission gain control signal from the mobile station control unit, wherein the reference voltage control unit comprises: a reference voltage tuner for tuning a voltage from a transmission power source and providing a reference voltage to the PAM; and an actuator for actuating the reference voltage tuner based on the reference voltage tuner output and the transmission gain control signal from the mobile station control unit, and wherein the reference voltage tuner further comprises: a transistor of which a base terminal is connected to an output terminal of the actuator; and a first resistor traversing emitter and collector terminals of the transistor.