关键词: 虚拟示波器, 模数转换器, 现场可编程门阵列, 数据采集, PCIE总线

Abstract: Based on the idea of virtual instrument, a hardware structure design and implementation scheme of a virtual oscilloscope based on FPGA and domestic ADC chip is proposed. The solution is based on the hardware structure of the PCI Express 3.0 8× bus interface for high-speed data acquisition, storage, processing and forwarding of Xilinx Kintex 7 series FPGAs. It supports up to 4 GS/s sampling and 4 GB DDR3 storage. This structure can realize 2 channels of data acquisition, each channel has an analog bandwidth of 3 GHz, when the 2 channels are used, the fastest single channel is 2 GS/s sampling, and the 1 channel is used the fastest 4 GS/s sampling. It can be directly inserted into the PCI Express slot in the computer to form a laboratory, product inspection and quality center, and data acquisition, signal analysis and processing systems in other fields such as radar signal processing, weather forecasting and earthquake prediction. It can also form an industrial A monitoring system that detects and observes the trend and status of signal changes during the production process.

Key words: virtualoscilloscope, analog/digitalconverter, field-programmablegatearray, dataacquisition, PCIEbus