Introduction - If you have any usage issues, please Google them yourself
To the Direct Digital Synthesis (DDS) as such a technology, it can use the digital value of the form of the frequency of sine wave signal control. The simplest DDS circuit includes a binary counter, such as between a full-wave sine wave value programmed ROM, and a Digital to Analog, used to store the value of the sine wave into a voltage. Counter clock frequency determines the frequency of sine wave, but the structure is not flexible.