51单片机，用ADC0809做成的数字电压表，效果不错的，有仿真。-51, made with the ADC0809 digital voltage meter, good results, there are simulation.

数字通信调制解调，仿真和FPGA的实现，以及炎症-Digital communications modulation and demodulation, simulation and FPGA implementation, as well as inflammation