自制USB调理电路实现便携式虚拟低频扫频仪

A Customized USB Circuit Module for Virtual Sweep Generator at Low-Frequency

针对目前国内虚拟低频扫频仪存在着价格昂贵和扫频范围较窄等缺点,采用自制的USB调理电路取代昂贵的专业采集卡,开发了基于LabVIEW的虚拟低频扫频仪,既节约了成本,又实现了较宽的低频扫频范围;同时采用USB接口便于安装和携带.经系统测试和实际运行表明,该产品操作简单,可满足实际检测的要求.

The disadvantage of narrow-band of the traditional virtual sweep generator at low-frequency is analyzed, and customized USB circuit module for virtual sweep generator at low-frequency is designed in this paper. The wide-band sweep range of frequency response is achieved and the cost is saved; and the advantage of the virtual instrument is kept, the USB interface is used for portable. After the systematic testing, very good effects in actual application is achieved, which shows that the design is easy for operation and available in practice.