基于FPGA的质谱仪高压脉冲电源设计

传统的高压脉冲电源产生的波形不易控制，脉冲幅值、频率、占空比等难以实时调节，而且脉冲的上升沿时间较长，无法满足飞行时间质谱仪（TOFMS）的苛刻要求。为解决上述问题，本文提出了一种用于飞行时间质谱仪的高压脉冲电源。该高压脉冲电源采用现场可编程门阵列（FPGA）做为主要芯片，产生PWM信号，经驱动电路和隔离电路后加在高速MOSFET开关管上。同时FPGA通过模拟串口和单片机或上位机通信，实现脉冲幅值、频率、延时、脉宽、脉冲个数等的实时调节。实际应用测试表明，该高压脉冲电源满足设计指标要求。

Design of high voltage pulse power supply based on FPGA used in TOFMS

We developed an high voltage pulse power supply used in mass spectromter, based on FPGA and Verilog HDL.The structure of the power supply is simple.The edge of the pulse is shorter, the frequency is increased, it has a stong anti interference and flexible way of working. We can adjust the votage ,frequency, the width and the number of pulse in accordance with my requirements. So the developed period is shorter than before, the volume of circuit is smaller, the systemic stability is better. The power supply has more practicability and flexible promotion. The working mode of the power supply is flexible. It can export positive pulse or negative pulse, except that, the positive pulse and the negative pulse can be real time switched , the number of the pulse can be seted as will.