| 摘要 |
A transmission power control apparatus which reduces the number of steps required for adjustments of the transmission power control apparatus and performs transmission power control with high accuracy in a wide dynamic range. The apparatus has a first variable amplifying circuit ( 122 ) with the resolution of 1 dB and a second variable amplifying circuit ( 123 ) with the resolution of 0.1 dB, where a correction value calculating section ( 106 ) calculates a correction value to compensate for deterioration in the accuracy of transmission power caused by a change in environment due to frequency characteristics and temperature characteristics and another correction value to compensate for error in transmission power, a transmission power calculating section ( 107 ) calculates transmission power obtained by correcting with the correction value specified transmission power to output to a communicating party based on the received signal, and a first set value calculating section ( 108 ) and a second set value calculating section ( 109 ) calculate gain values to set on the first variable amplifying circuit ( 122 ) and second variable amplifying circuit ( 123 ) based on the corrected transmission power, respectively.
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