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    • 5. 发明授权
    • Power switch control circuit for television apparatus
    • 电视机电源开关控制电路
    • US4647823A
    • 1987-03-03
    • US741795
    • 1985-06-06
    • David W. Luz
    • David W. Luz
    • H04N3/18H03K4/68H01J29/70
    • H03K4/68
    • A television deflection apparatus includes a deflection winding coupled to a retrace capacitance to form a retrace resonant circuit. A power transistor switch is coupled to the retrace resonant circuit for generating alternating current in the retrace resonant circuit. The power transistor switch energizes a primary winding of a flyback transformer that supplies a first voltage across a secondary winding of the flyback transformer. The first voltage is coupled to an inductance for forming an upramping current in the inductance. The upramping current in the inductance is coupled to the base electrode of the power transistor switch, causing the power transistor switch to be conductive during the second half of trace. A second switch, that is responsive to a deflection rate input signal, couples to the base electrode of the power transistor switch a negative supply voltage that turns off the power transistor to initiate the retrace interval.
    • 电视偏转装置包括耦合到回扫电容的偏转线圈以形成回扫谐振电路。 功率晶体管开关耦合到回扫谐振电路,用于在回扫谐振电路中产生交流电。 功率晶体管开关为回扫变压器的初级绕组通电,该回扫变压器在回扫变压器的次级绕组上提供第一电压。 第一电压耦合到用于在电感中形成上拉电流的电感。 电感中的上拉电流耦合到功率晶体管开关的基极,导致功率晶体管开关在跟踪的后半段处于导通状态。 响应于偏转率输入信号的第二开关耦合到功率晶体管的基极切换负电源电压,该负电源电压关断功率晶体管以启动回扫间隔。
    • 6. 发明授权
    • Resonant energy recovery type crt deflection circuit
    • 谐振能量恢复型CRT偏转电路
    • US3714503A
    • 1973-01-30
    • US3714503D
    • 1970-12-21
    • UNITED AIRCRAFT CORP
    • WEST R
    • H03K4/62H03K4/68H04N3/185H01J29/70
    • H03K4/68H03K4/62H04N3/1856
    • A winding coupled to the input choke of a resonant energy recovery type deflection circuit with a disconnect diode in series with the choke enables use of a power supply voltage for the circuit which is much lower than what has heretofore been required due to the need to maintain sweep current and flyback voltage at acceptable levels. Another embodiment includes a transductor and a difference amplifier to regulate the deflection circuit yoke capacitor voltage so that raster size remains constant. The circuit is thereby immune to component and power supply voltage variations. Both embodiments utilize mostly elements which are substantially non-dissipative.
    • 耦合到具有与扼流器串联的断开二极管的谐振能量恢复型偏转电路的输入扼流圈的绕组使得能够使用比由于需要维护而要求的电源电压低得多的电源电压 扫描电流和反激电压在可接受的水平。 另一个实施例包括一个转换器和一个差分放大器,以调节偏转电路磁轭电容器电压,使光栅大小保持恒定。 因此,该电路免于组件和电源电压变化。 两个实施例主要利用基本上不耗散的元件。