| 摘要 |
PROBLEM TO BE SOLVED: To eliminate interference caused by driving a short-circuitted horizontal output transistor when that serially connected horizontal output transistor is short-circuitted by driving a relay between a collector and an emitter on one side concerning the video display device of multiscan using a cathode-ray tube(CRT). SOLUTION: By providing a switch part 16 on the preceding stage of a drive amplifier circuit 5 in the transmission route of a driving pulse 1 of a horizontal output transistor 7 to be short-circuitted at the time of driving a relay 11, concerning this circuit, when transistors 6 and 7 are serially operated in the state of opening the relay 11, the driving pulse is transmitted by driving the switch part 16 but when the relay 11 is driven, the transmission of the driving pulse is interrupted by turning the switch part 16 into opening state. |
