| 摘要 |
<p>RCA 74, 541 A horizontal deflection generator includes the series arrangement of a horizontal deflection winding and a trace capacitor, a retrace capacitor, and a horizontal trace switch. The trace switch comprises a damper diode and a horizontal output transistor. Base drive for the horizontal output transistor is provided by a horizontal driver stage through a driver transformer. A secondary winding of a flyback transformer is coupled to a high impedance cascade rectifier arrangement to form a DC supply which provides collector supply voltage for the driver stage. The DC supply has a relatively large source impedance to changes in the load current being drawn from the supply by the driver stage. Such a large impedance is desirable in order to limit the base driver to the horizontal output transistor during picture tube arc-over and to allow for duty cycle tolerances in the horizontal oscillator output.</p> |
