DIGITAL TYPE PHASE CONTROL CIRCUIT

PURPOSE:To attain phase control with high accuracy by providing a gate circuit activated based on a phase difference of a feedback signal detected from a phase controlled circuit. CONSTITUTION:A reference signal generator 10 generates a frequency sufficiently higher than an output frequency, the frequency is frequency-divided by a frequency divider 11 and outputted as an output signal phiA. On the other hand, an output signal phiB is outputted while being frequency-divided by a gate circuit 13 and a frequency divider 12 when the phase of feedback signals phiA', phiB' is balanced. When the phase of the feedback signals phiA', phiB' is unbalanced, the gate circuit 13 is controlled so as to increase/decrease the number of input pulses to the frequency divider 12 thereby controlling the phase difference between the output signals phiA and phiB. Thus, the phase control with high accuracy is attained.