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3.脉冲电压过压检测电路脉冲低压过压检测电路如图12所示。常应用于对显像管的灯丝电压进行检测,称为“X射线”过高保护,也称为超高压保护。图12(a)检测电路中,先将要检测的脉冲电压通过VDl、C1进行整流、滤波,然后通过稳压二极管VZ对整流、滤波后的低压进行检测。当被检测的电压高于稳压二极管VZ的稳压值时,稳压二极管VZ被击穿,将高电平触发电压送到电压翻转电路。为了与稳压二极管配合,对脉冲电压
3. Pulse voltage overvoltage detection circuit Pulse low voltage overvoltage detection circuit shown in Figure 12. Often used to detect the filament voltage of the tube, known as “X-ray ” high protection, also known as ultra-high voltage protection. Figure 12 (a) detection circuit, the first pulse voltage to be detected by VDl, C1 rectifier, filter, and then through the regulator diode VZ rectifier, filtered low voltage detection. When the detected voltage is higher than the voltage regulator diode VZ value, the voltage regulator diode VZ breakdown, the high trigger voltage to the voltage flip circuit. In order to cooperate with the zener diode, the pulse voltage