基于NCO的数字控制振荡器。带测试程序，输出12位的COS和SIN波形。-Based on the digital control oscillator NCO. With test procedures, the output 12 of the COS and the SIN waveform.

verilog编写的数字信号发生器NCO用CORDIC方法实现产生sin cos信号，流水线结构，简单实用。-verilog prepared by the digital signal generator NCO using CORDIC method implementation generate sin cos signal, pipelined architecture, simple and practical。