| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a transmitting power control method for a CDMA system, capable of executing stable control by adding offset voltage to controlled voltage so as to compensate the variation of characteristic at the time of transmitting maximum power caused by the variations in temperature. SOLUTION: This transmitting power control method for a CDMA system control transmitting power by controlling the gain of an AGC amplifier 1 by means of a transmitting power control signal Vc, equipping an AGC amplifier 1 and an RF power amplifier 2, is provided with a first comparator 3 for comparing the signal Vc and a prescribed reference value e1 with each other and a second comparator 3 detecting the transmitting power and comparing the detected value and the prescribed reference value with each other. When an output signal is outputted from only the first comparator 3, a signal in a direction raising the transmitting power is generated, and when the output signal is outputted from only the second comparator 10, a signal in a direction lowering the transmitting power is generated to be added to the signal Vc as an offset signal Vo. When the output signal is outputted from both the first and second comparators 3 and 10 and when there is no output signal from both the comparators 3 and 10, the present offset signal is maintained.</p> |
