| 摘要 |
APC circuitry used for a radio transmitter comprises a detector (7) which detects a radio frequency (RF) output signal (5) to output a detection signal (8), an integrator (15) which integrates the detection signal (8) to output a power signal (16) representing the average power level of the RF output signal (5), a control unit (18) for calculating an error level from the difference between the average power level and a reference power level which corresponds to a predetermined power of the RF output signal (5), and for multiplying the error level by a correction coefficient so as to calculate a control signal correction value for correcting the value of a control signal (14) and then generate control data the digital value of which is corrected according to the control signal correction value and a reference control value that is predetermined so as to generate the RF output signal (5) having the predetermined power.
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