| 摘要 |
PURPOSE:To simplify the circuit, by eliminating the high voltage control and correction circuit, by superimposingly using the voltage rectifying and smoothing the flyback pulse as the detection voltage detecting the high voltage in the high voltage limit circuit of a TV receiver and the voltage changed according to the high voltage load variation. CONSTITUTION:In the high voltage limit circuit of a TV receiver, the flyback pulse of the flyback transformer winding 1 is rectified with the diode 3 as the detection voltage detecting the high voltage, and the DC voltage smoothed with the smmothing capacitor 4 and the voltage varied with load variation produced across the emitter resistor 19 of the horizontal output transistor Tr 18 are used. Further, the low voltage side of the capacitor 4 is connected to one end of the emitter resistor 19 of Tr 18, and the voltage varied with the load variation and the voltage smoothed with the capacitor 4 are superimposed to form the high voltage detection voltage. |
