PHASE SYNCHRONIZATION CONTROLLING SYSTEM OF HIGH FREQUENCY RECTANGULAR SIGNAL

摘要

PURPOSE:To execute a phase synchronization control of a rectangular signal whose frequency is extremely high by executing a phase comparison by using a sampling circuit and a logical circuit, detecting a phase shift of leading and lagging, and generating a control signal of a phase adjusting circuit. CONSTITUTION:An input waveform A of a reference high frequency rectangular signal and an input waveform B of a high frequency signal to be controlled are supplied to a sampling circuit 14 and 15, respectively. The respective sampling waveforms A and B are sent to a phase detecting circuit 16. Also, in accordance with whether the sampling waveform B leads or lags A by its phase, a pulse of a phase shift period ''1'' is outputted from an AND circuit 19 or outputted from a circuit 20. These outputs are supplied to a phase counter 21, the counter 21 is brought to count-up when the high frequency rectangular signal to be controlled is in a leading phase, and brought to count-down when said signal is in a lagging phase. Their counting value is sent to a D/A converter 22, and converted to an analog signal. This signal is used for a phase synchronization control of a phase adjusting circuit.