Description: First, the DDS module is a more commonly used in digital way to realize analog signal, the method of used in frequency control, this time also by deep understanding of using phase control, from this perspective, you can use the FPGA implementation of a piece of cake of frequency and phase controlled multichannel SPWM wave, and then to plus the RC filter circuit and the op-amp circuit can realize controllable sine wave.
Second, the DDS module and create a reversible counter count can make the clock and direction control clock, need specific about is that if you output sine value is 8 bits, so is the scope of your counter counts in 0-255-0, if your output sine value is nine, so is the scope of your counter counts in 0-511-0. Also, every change after the count (a "number" triangle wave), only in the DDS output a sine value, the comparison
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