Pxi Data Acquisition Module Hardware Design

Data acquisition is an essential preliminary work before digital signal porcessing. Due to its critical, even decisive role in the whole digital system, it has widely uesed in digital signal processing area. This data acquisition card has the maximum sampling rate of 1GSa/s, based on PXI (PCI Extension for Instrumentation) bus. With utilization of computer, this acquisition card improved the performance of data analysis, and lowers the cost of the instrument.This dissertation describes the basic theory of the data acquisition card and introduces the application and developing trend in data acquisition. And it also gives the testing metods and results.The project uses the Field Programmable Gates Array (FPGA) to realize high-speed data acquisition, Window trigger and PXI trigger, and storing control. In the design of the high-speed sampling, this project adopts deserializer in order to achieve lower frequency of data processing circuits. In the design of sampling clock, external clock can be used to sampling. In the aspect of trigger, this project realizes window trigger and PXI trigger. The innovation and main research of this dissertation are the presentation of the deserializer, sampling with external clock and the window trigger and PXI trigger.In the design of the PXI interface, main performance of PXI protocol is introduced. And this dissertation also studes the PXI interface chip and the connection with data acquisition circuit.These test results indicate that this data acquisition card has good capability of data acquisition and nice data transmission with PXI interface. So it can meet the customer requirements of high-speed signal acquisition and processing.