脉冲电压信号测量系统

随着电子技术的发展,半导体开关元件的切换频率不断提高。为了检测开关元件在快速切换开关时产生的脉冲电压信号,本文讨论了窄脉冲信号检测的原理和方法,设计并实现了脉冲测量电路。该电路分别采用高速ADC和DDR2存储器进行波形采集和存储,并在FPGA中设计检测电路,通过信号同步触发的形式实现窄脉冲信号的实时检测。实验表明:系统能够有效捕获到脉宽为100纳秒级的信号,且具有较高的幅度精度以及良好的实时性。同时,预触发长度可以通过编程实现。

The System of Pulse Voltage Signal Measurement

With the development of electronic technology,the switching frequency of the semiconductor switching element increases continuously.In order to detect the pulse voltage signal generated by the switching element when switching rapidly,this article discusses the principles and methods of narrow pulse signal detection,and the circuits of pulse measurement are designed and implemented.The circuits adopt high-speed ADC and DDR2 memory for waveform collection and storage,and detection circuits are designed in the FPGA,the real-time detection of narrow pulse signal is implemented by synchronous trigger of signal.Experimental results show that:the system can effectively capture signal with a pulse width of 100 nanoseconds,and it has high amplitude accuracy and good real-time.At the same time,the length of the pre-trigger can be achieved by programming.