CIRCUIT FOR CONTROLLING POWER OF MOBILE COMMUNICATION TERMINAL

摘要

PURPOSE: A circuit for controlling the power of a mobile communication terminal is provided to prevent a power noise generated by a control voltage switching element or a voltage drop resistor and perform a stable power control. CONSTITUTION: The first power amplifying unit(11) amplifies a cellular driving signal supplied from a drive amplifier. The second power amplifying unit(12) amplifies a PCS driving signal supplied from the drive amplifier. A control voltage supply unit(13) variably supplies a control voltage of the first power amplifying unit(11) according to control signals inputted from an MSM. A power amplifier power control unit(14) performs a switching operation according to the control signal and a power inputted from the MSM and supplies powers to the first power amplifying unit(11) and the second power amplifying unit(12). The first filter(15) filters a cellular driving signal output primarily amplified in the drive amplifier and supplies the filtered cellular driving signal output to the first power amplifying unit(11). The second filter(16) filters a PCS driving signal output primarily amplified in the drive amplifier and supplies the filtered PCS driving signal output to the second power amplifying unit(12).