CONTROL DEVICE OF AMPLITUDE LEVEL FOR RADIO FREQUENCY SIGNAL

摘要

An apparatus for controlling an amplitude level of a high frequency signal controls the amplitude level of the inputted high frequency RF signal by using a difference value of a DC signal value between a reference signal and an input signal. An RF switch(200) receives a reference signal and an input signal alternatively by a synchronization signal and outputs the inputted signal. A detector(300) converts the RF signal of the input signal and the reference signal that are the output signals of the RF switch to the DC signal and outputs the signal. A direct current switch receives the DC signal of the input signal and the reference signal that are the output signals from the detector alternatively to be suitable for the synchronizing signal. An amplitude level controller(500) receives the DC signal of the reference signal and the input signal which are converted into the DC signal and compares the amplitude levels of respective signals, and controls and outputs the DC signal that is the difference value between the amplitude levels of respective signals.