| 摘要 |
PROBLEM TO BE SOLVED: To provide a high voltage circuit where a frequency compensation circuit gives effect on an X-ray radiation protection(XRP) circuit in a high voltage adjustment circuit to properly operate a cathode ray tube(CRT) under a fluctuated frequency of a voltage to start a high voltage transformer. SOLUTION: The frequency compensation circuit 24 is provided with a voltage source generator 24 that responds to an input to a 1st voltage source relating to a high voltage (VHV) output of a high voltage adjustment device 30 and to a frequency of a high voltage generator 22 of the CRT. A circuit that is voltage-controlled responds to the voltage source generator 24 to control delivery of a 1st voltage to an X-ray protection circuit 23 thereby delivering a comparatively constant ratio of a high voltage output under a fluctuated frequency from the high voltage generator to the X-ray protection circuit 23. |
