| 摘要 |
<p>HIGH VOLTAGE PROTECTION CIRCUIT An integrated thyristor-rectifier (ITR) replaces the conventional damper diode in a television deflection system. The damper diode function is performed by the rectifier portion of the ITR, the thyristor being reverse biased during the damping interval. The forward breakover voltage characteristic of the thyristor portion of the ITR insures that the cathode of the damper-rectifier portion of the ITR will not rise to a higher voltage than the thyristor's forward breakover voltage above the cathode of the thyristor during the remaining portion of the deflection cycle. If the cathode of the damper-rectifier rises above the thyristor forward breakover voltage, the thyristor begins to conduct heavily causing the deflection current to decay rapidly and rendering the television display unviewable while simultaneously limiting the generated high voltage.</p> |
