DEVICE FOR COMPENSATING TRANSMISSION OUTPUT ERROR OF MOBILE COMMUNICATION TERMINAL

摘要

PURPOSE: A device for compensating a transmission output error of a mobile communication terminal, is provided to compensate a transmission output error caused by a temperature change with simple hardware. So that the communication incapability and the deterioration of speech quality between a terminal and a system due to the lowering of a transmission output when the terminal is in a high temperature, can be previously prevented. CONSTITUTION: A central processing unit(110) outputs control data for compensating a transmission output changed according to temperatures. A digital-to-analog(D/A) converter(120) converts the control data into corresponding analog voltages. A temperature sensor(130) detects the temperatures of a power amplifier and a mobile communication terminal, and outputs the detected temperature values into DC voltage values. A voltage adder(140) adds voltages outputted from the temperature sensor(130) and the D/A converter(120). A phase inverter(150) inverts the phases of the voltages outputted from the voltage adder(140), and outputs the inverted phases into control voltages. An auto gain controller(160) controls the gain of an amplifier in order to compensate the transmission output change according to temperature changes by the control voltages outputted in the phase inverter(150).