| 摘要 |
<p>PURPOSE:To cheapen circuit constitution by providing a high voltage control coil in a fly back transformer and connecting a capacitor to it in series, and controlling the currents of the capacitor so as to obtain stabilized high pressure output voltage. CONSTITUTION:High pressure pulse occurs at a secondary coil 15 by the primary pulse voltage of the primary coil 14 of a fly back transformer 12, and this is rectified with a rectifying circuit 13 so as to take out high pressure output voltage, which is supplied to a cathode-ray tube 6. High pressure fluctuation detected voltage which is taken out with a high pressure fluctuation resistor 18 on the output side of a circuit 13 is compared with standard voltage 20 with a comparing amplifying circuit 19, and the voltage of its difference is amplified and is entered in a current control circuit 21. And the currents flowing to a capacitor 17 is changed and is transmitted to the coil 14 with a high pressure control coil 16, and the pulse width of the primary pulse voltage is changed so as to change the primary voltage, and high pressure pulse is changed so as to stabilize high pressure output voltage. According to this constitution, a horizontal deflecting yoke 5 is connected to the primary side of a transformer 12, and a horizontal deflecting circuit and a high voltage generating circuit are united, and it becomes cheap circuit constitution.</p> |
