多功能波形发生器VHDL程序与仿真 URAT VHDL程序与仿真 ASK调制与解调VHDL程序及仿真 LCD控制VHDL程序与仿真-Multi-function waveform generator and simulation of VHDL procedures URAT VHDL simulation procedures and ASK modulation and demodulation procedures and VHDL simulation program LC