| 摘要 |
PURPOSE:To reduce current consumption of a vertical deflection circuit for saving power, by providing a circuit which rectifies and smoothes the superimposed output between the output of a series resonance circuit connected to a ternary winding of FBT and the DC power supply output of low internal impedance. CONSTITUTION:The power supply circuit 30 the internal impedance of which is changed on the load current is constituted with the 1st rectifying smooth circuit 10 supplying a large current to the load circuit L and thd 2nd rectifying and smoothing circuit 20, and the circuit 30 supplying small current high voltage to the vertical deflection circuit V together with the circuit 10. This circuit 10 is provided with the diode 13 rectifying, smoothing and outputting the positive output component of negative pulse F from the ternary coil 12 of FBT11, and capacitor 14. The circuit 20 is provided with the series resonance circuit 21 consisting of inductance 24, and capacitor 25, and diode 20 and capacitor 23 which rectify and smooth the output of the neutral point O of the circuit 21. Further, the current is fed to the deflection circuit V and load circuit L with less current loss. |
