| 摘要 |
PURPOSE:To allow the titled oscillator to follow up a high angular frequency of phase fluctuation of an input signal without any error by applying an output of a voltage controlled oscillator to a phase shifter whose phase shift amount is controlled by an output of a phase comparator. CONSTITUTION:A loop of the phase locked oscillation is constituted by the phase comparator 2, a filter 3 and the voltage-controlled oscillator 4. If a phase fluctuation takes place in a signal fed via an input terminal 1, an ouptut of the voltage controlled oscillator 4 is fed to the phase shifter 8, and corrected in the process when an output signal passes through the phase shifter 8 to make the phase in phase with that of the signal fed to the input terminal 1 and the result is outputted via an output terminal 5. Thus, the phase is followed up correctly without any error. |
