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High voltage hold down circuit

阅读：235发布：2023-03-20

专利汇可以提供High voltage hold down circuit专利检索，专利查询，专利分析的服务。并且In a horizontal deflection circuit utilizing a voltage multiplier to develop the kinescope ultor voltage, a switching diode is coupled from the S-shaping capacitor in series with the deflection winding to a control element of a horizontal deflection output device to prevent the ultor voltage from increasing to an excessive level in the event the damper diode becomes open circuited. During normal operation, the voltage on the capacitor will reverse bias the switching diode, if however, the damper diode circuit opens, the capacitor voltage will cause the switching diode to conduct to clamp the control element of the output device to the capacitor voltage which prevents the horizontal output stage from developing excessive ultor voltage.，下面是High voltage hold down circuit专利的具体信息内容。

权利要求

1. A deflection circuit comprising: a source of deflection frequency signals, a semiconductor device having a control element coupled to said source of deflection frequency signals, a deflection winding, a capacitor serially coupled to said deflection winding, the combination coupled across said semiconductor device, a damper diode coupled across said semiconductor device and poled to conduct deflection current during a portion of each deflection cycle, thereby charging said capacitor serially coupled to said deflection winding, a high voltage generation circuit coupled to said damper diode and responsive to peak-to-peak voltages for developing a relatively high output voltage, and switching means coupled to said capacitor and to said control element of said semiconductor device and responsive to changes in the voltage across said capacitor caused by said damper diode conduction path being removed to clamp the voltage at said control element of said semiconductor device to a value to prevent the development of an excessive high voltage from said high voltage generation circuit.

2. A circuit as defined in claim 1 wherein said switching means comprises a diode having an anode terminal coupled to said control element and a cathode terminal coupled to said capacitor.

3. In a deflection circuit including a semiconductor device having a control element for supplying deflectiOn current to a deflection winding wherein an S-shaping capacitor is serially coupled to said deflection winding, and whereby a damper diode provides a conduction path for current in said deflection winding during a portion of each deflection cycle, and wherein a voltage multiplier circuit is employed to produce a high voltage in response to flyback pulses present in said deflection circuit; a high voltage hold down circuit comprises: a unidirectional conductive device coupled from said S-shaping capacitor to said control element and responsive to a voltage change on said capacitor caused by said damper diode conduction path being removed, to conduct, thereby coupling said control element to said capacitor to prevent the generation of excessive high voltage by said voltage multiplier.

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