中文摘要：

针对以前研究中高场非对称波形电源不足的问题，提出了一种用于FAIMS系统的高场高频非对称波形电源的设计。该电路由方波产生电路、高通滤波器和直流叠加电路3部分组成。方波产生电路采用半桥结构，通过2个MOSFET管的串联，实现了高压方波的输出。利用高通滤波器去除了高频方波中的直流分量，使正方波变成正负面积相等的非对称方波，并进行了理论分析。直流叠加电路通过电阻和电感串联将低压直流信号叠加到高频高压的非对称方波上，同时有效阻隔了高频高压非对称方波对低压直流电源可能造成的损害。还给出了电路的结构，并进行了实验研究。实验结果表明，该电路可以很好地实现非对称方波的自动产生和补偿电压叠加功能，且结构简单。该电路能够输出的最大峰峰值电压为2000V，方波频率为200kHz。

英文摘要：

A high-field high-frequency asymmetric waveform power supply for FAIMS （High-field Asymmetric Waveform Ion Mobility Spectrometry ） system is developed. The circuit consists of three parts, namely, a square wave generator, high-pass filter and DC superimposition circuit. The output of high-voltage square wave is achieved by the square wave generator which uses half-bridge structure comprising two series-connected MOSFET. A high- pass filter is used to block the DC component of the high frequency square wave, so that the unipolar square wave becomes the bipolar asymmetric waveform of which the positive and negative portions of the waveform are equal, and the theoretical analysis is also conducted. The low-voltage DC signal superimposed on the asymmetric waveform is implemented by the DC superimposition circuit composed of a resister and inductor connected in series which damps the high-frequency high-voltage asymmetric waveform, protecting the low-voltage DC power supply. The structure of the circuit is proposed and verified by experiments. The results show that the functions of automatic generation of the asymmetric square wave and compensation voltage superimposition can be realized and the circuit structure is simple. The maximum peak-to-peak voltage and frequency of the circuit is 2000 V and 200 kHz respectively.