| 摘要 |
PURPOSE: To reduce power consumption and to improve flexibility by providing the vertical deflection circuit with a flyback voltage source capable of supplying flyback voltage necessary for the inversion of a york current. CONSTITUTION: An amplifier 12 is driven by a known saw tooth generator 14 and drives a flyback detection circuit consisting of a vertical defleciton york 10, a resistor 24 and a compensation capacitor connected to the resistor 24 in series. When a york current ig is maximized on the output side of the amplifier 12, a low power transistor(TR) T2 is turned off, voltage on the output side of the amplifier 12 is suddenly boosted, and when the voltage exceeds VS, a TR 6 is turned to a conductive state and a total value of the voltage Vf and the direct voltage drop of two diodes D1, D2 is impressed to the york 10. When a currant ig on a rise step reaches +Ip , a final stage constituted of the TRs T1, T2 is returned to a normal operation state and a current traces a scanning gradient. |
