APPARATUS FOR DETECTING POWER IN MOBILE COMMUNICATION TERMINAL

摘要

PURPOSE: An apparatus for detecting a power in a mobile communication terminal is provided to stably detect a transmission power outputted from the mobile communication terminal without directly connecting to a transmission path and being influenced to the transmission path by detecting the power using a photo LED and a photo detector. CONSTITUTION: A duplexer(11) simultaneously performs transmission and receipt functions to an RF(Radio Frequency) signal of a mobile communication terminal. An MSM(Mobile Station Modem)(12) controls an entire operation of the mobile communication terminal. An IFT(Intermediate Frequency Transceiver)(13) converts a transmitting IF signal into an RF signal to process the RF signal, and performs an AGC(Automatic Gain Control) function for uniformly maintaining a transmission power outputted from the mobile communication terminal. A power amplifier(14) amplifies a power of the RF signal processed in the IFT(13) through the transmission path and outputs the amplified RF signal to the duplexer(11). A power detecting device(15) detects the transmission power outputted from the mobile communication terminal using the strength and weakness of the light emitted from a photo LED, and outputs the result to the IFT(13).