Phase synchronization circuit in display unit of computer, has divider which divides output of voltage controlled oscillator corresponding to detected period and returns it to oscillator

摘要

A period detector (6) detects the period of an external input signal. A divider (5) divides the output of a voltage controlled oscillator (3) corresponding to detected period and returns it to the oscillator. The phase comparator (1), filter (2) and voltage controlled oscillator (3) are connected in series between the input and output. The output of the oscillator is fed back to the phase comparator. An INDEPENDENT CLAIM is also included for the deflection compensation circuit.