Signal acquisition is the necessary means of measurement and analysis . Currently on the market signal acquisition has many card types and different functions, mainly divided into high-speed signal acquisition card and low-frequency signal acquisition card, targeted for the majority of the design and few channels, limited scope. Therefore, this article and has designed a 32-channel analog signal acquisition card, use CPLD to achieve access control and acquisition AD conversion, the switch can access through the acquisition of 32 real-time signals, suitable for large-scale signal acquisition applications.
In this paper, it was based on the CPLD signal acquisition system. The design of CPLD’s core is the use of the resources and structure. It can realize like signal acquisition and control, signal processing, communications and export control, and other functions and so on. It introduced the concept of signal acquisition and the current common signal acquisition system. It also analysis the signal system . The signal acquisition of modular system, which focuses on multi-channel signal acquisition system design and implementation.
Keywords: Signal acquisition system, CPLD, AD,Sampling