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提出了一种基于FPGA的多路模拟量信号源设计方法。该系统以Altera公司的Cyclone系列EP2C8为核心。它包括多路数模转换单元、电源隔离、稳压单元及运算放大单元等,实现了电源独立的不同频率、不同波形的多路模拟量信号源。主要模块采用VHDL实现,通过合理利用路选通信号对各路模拟量信号进行锁存,实现了各路数据的正确分路,各路模拟量波形输出,并通过USB接口上传数据并实时显示,经多次测试表明,该系统稳定可靠,每路输出电压纹波小于30 mV。
A multi-channel analog signal source design method based on FPGA is proposed. The system is based on Altera’s Cyclone series EP2C8. It includes multi-channel digital-analog conversion unit, power isolation, voltage regulator unit and operational amplifier unit, etc., to achieve independent power supply of different frequencies, different waveforms of multi-channel analog signal source. The main module uses VHDL to achieve, through the rational use of the way select signal to latch the analog signals, to achieve the correct data of each branch, the analog waveform output, and upload data through the USB interface and real-time display, After several tests show that the system is stable and reliable, each output voltage ripple less than 30 mV.