基于FPGA的R2R DAC设计与仿真

Design and Simulation of R2R DAC Based on FPGA

随着通信技术和数字信号处理技术的快速发展,对数模转换器(DAC)提出了更高的要求,尤其在转换速度和转换精度方面,为此,设计了一种高精度的数字DAC系统。该系统包括DAC模块、电源电路和模拟滤波模块。其中,DAC电路设计是基于R2R电阻网络的架构,使用分立元器件设计的一种16位高性能数模转换器。输入端采用的是I2S通信接口,将输入的串行数据转为并行数据,再传输至电阻网络,经过DAC完成数模转换。通过设计的模拟滤波器对输出的模拟信号进行滤波处理,可使整个系统满足高精度和高分辨率的要求。最后,使用FPGA测试和验证该系统,发现数据转换结果达到了预期目标。

With the rapid development of communication technology and digital signal processing technology,higher requirements are put forward for digital to analog converters(DAC),especially in terms of conversion speed and accuracy.Therefore,a high-precision digital DAC system was designed.The system includes DAC module,power circuit,and analog filtering module.Among them,the DAC circuit design is a 16 bit high-performance analog-to-digital converter based on the R2R resistor network architecture,designed using discrete components.The input end adopts the I2S communication interface,which converts the input serial data into parallel data,and then transmits it to the resistance network for digital to analog conversion through DAC.By filtering the output analog signal through a designed analog filter,the entire system can meet the requirements of high precision and resolution.Finally,the system was tested and validated using FPGA,and it was found that the data conversion results achieved the expected goals.