AUTOMATIC LEVEL CONTROL CIRCUIT FOR TRANSMITTER

PROBLEM TO BE SOLVED: To eliminate overshoot caused in a rising state at the transmission start of a conventional digital transmission output level control circuit. SOLUTION: A voltage proportional to a transmission output level extracted by a power detector 4 is given to an A/D converter 6, in which the voltage is converted into a digital voltage to give to a controller 7. The controller 7 stores a prescribed transmission power and a control variable at that point, provides a reduced value at the start of transmission by decreasing the control variable, and controls the transmission output repetitively for a prescribed time in a way that the controller 7 decreases a control voltage when the detected transmission output is higher than a positive permissible deviation of the transmission output and increases the control voltage when the detected transmission output is lower than a negative permissible deviation of the transmission output.