| 摘要 |
PURPOSE:To correct a supply voltage by detecting fluctuations of high-voltage loads, and simultaneously, to suppress fluctuations of high voltages and horizontal deflection amplitudes by controlling deflecting currents. CONSTITUTION:When the voltage at an output terminal 20 is lowered or raised, an error detecting circuit 12 works and the base voltage of a transistor 13 is raised or lowered and the supply voltage to be supplied to a flyback transformer 2 becomes higher or lower. On the other hand, a circuit consisting of transistors 16 and 17 works in the following way in parallel with the above-mentioned operation, and a deflecting current flowing into a deflecting coil 3 is maintained constant. When a high voltage load current increases, the base voltage of the transistor 13 also increases, but, since the voltage is divided by resistances 14 and 15 and added to the base of the transistor 16, the voltage at a terminal 9 also increases and the deflecting current flowing into the deflecting coil 3 is reduced. When, on the contrary, the high-voltage load current decreases, an opposite condition is realized, and consequently, the deflecting current is maintained constant. Therefore, the high-voltage and deflecting current are stabilized. |
