Patent ID: 7738888

Claim:
An apparatus for controlling the transmission power for a mobile terminal, the apparatus comprising: at least one first amplifier for amplifying according to a control signal a transmission signal to be transmitted via an antenna; a second amplifier for amplifying the transmission signal input from the at least one first amplifier by a predetermined power level according to an ON control signal; a coupler for splitting the transmission signal output from the second amplifier and outputting the split signal to the antenna and an attenuator; the attenuator for attenuating the power of the transmission signal input from the coupler by a predetermined power level according to the ON control signal; a power detector for detecting the power level of the amplified transmission signal; and a controller for determining the power level of a transmission signal that has to be transmitted, outputting the ON control signal to attenuator if the power level falls within a high power range, compensating the power level of the transmission signal detected by the power detector with the attenuation power in the coupler and the attenuation power in the variable attenuator, recognizing the compensated power level as the power level of a currently output transmission signal, comparing the recognized power level of the currently output transmission signal with the power level of the transmission signal that has to be transmitted, and controlling the amplifiers to compensate the recognized power level of the currently output transmission signal by a difference between the recognized power level and the power level of the transmission signal that has to be transmitted.