晶体管驱动的阶跃二极管大幅度窄脉冲源

目前纳秒级窄脉冲源的实现方法有很多,但很难用低电源产生大幅度窄脉冲,或是实现输出脉冲幅度大于其工作电压。提出了一种采用阶跃恢复二极管在双极型晶体管驱动下实现工作于低电压的大幅度纳秒级窄脉冲源的方法。该方法利用阶跃管的阶跃特性,同时利用晶体管的驱动,对阶跃管的激励源形式进行改进设计,实现大幅度窄脉冲。仿真和测试结果表明:该电路具有输出脉冲幅度不小于工作电压的特点,并具有电路简单、脉宽可调、易于集成等优点,适用于超宽带通信系统中窄脉冲信号的产生。

Narrow Pulse Source of High-voltag Based on Step Recovery Diode Driven by Transistor

Current ways of generating narrow pulse is difficult to generate a high-voltage narrow-pulse or a narrow-pulse of voltage higher than working voltage.This paper presented a method to generate a high-voltage narrow-pulse by using a step recovery diode at low voltage which was driven by bipolar transistor.The basic principle of this method was to realize the generation of a high-voltage narrow-pulse by using step characteristic of step recovery diode,and the excitation source form was redesigned based on bipolar driving.Simulation results showed that the circuit’s output pulse voltage was not lower than working voltage and had advantages of simple circuit,adjustable pulse width,prone to be integrated,etc.This method was suitable to generate narrow-pulse for ultra-wideband communication system and played an important role in increasing the detecting distance of ultra-wideband fuze.