RADIO TRANSMITTER, FREQUENCY CHARACTERISTIC CORRECTION METHOD, AND TEMPERATURE CHARACTERISTIC CORRECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a radio transmitter and a frequency characteristic correction method for a transmission circuit of the radio transmitter, which can easily obtain a frequency characteristic correction value of the transmission circuit in the case of transmission power with which a detector circuit outputting detection voltage by detecting part of antenna input power at an antenna end of the transmission circuit does not work.;SOLUTION: A frequency characteristic correction value of a transmission circuit 30 is calculated from a correction value in a state where a detector circuit 16 is activated, and an analog voltage based on the correction value and an analog voltage having a fixed value output from a gain control part 19 are made to be added and output to a variable gain amplifier 10 of the transmission circuit 30 in the case of low transmission power with which the detector circuit 16 does not work. Thereby, the frequency characteristic correction value of the transmission circuit 30 can easily obtained in the case of transmission power with which the detector circuit 16 does not work.;COPYRIGHT: (C)2013,JPO&INPIT