摘要
针对模拟信号在传输介质中优于数字信号,而设计数模转换模块。首先用System View对DAC模块进了仿真。然后设计的D/A转换的硬件电路。通过设计了一个前置的串并转换电路,不仅可以实现8位并行数字信号的D/A转换,还可实现8位串口输入数字信号的D/A转换。在输出端,接入一个有源二阶低通滤波电路,使模拟输出更为平滑。达到了在实际范围内较低波形衰减的目的。
The analog signal is better than the digital signal in the transmission medium, so a digital to analog converter is designed. System View is used to simulate the DAC module. Then the D/A conversion hardware circuit is designed. A front-end parallel/serial conversion circuit is designed, which makes possible D/A conversion of both 8-bit parallel digital signals and 8-bit serial digital signals. On the output side, an active second-order low-pass fil-ter circuit is included so the analog output is smoother. Lower waveform attenuation within the practical range is achieved.
出处
《电子科技》
2015年第5期43-44,49,共3页
Electronic Science and Technology
