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  1. maehne

    Direct Digital Synthesis

    As you can see from the DDS block diagram, which you posted, the structure of DDS block is quite simple. I therefore would model it as a single TDF module containing the accumulator register as a state variable. As input, you will have your frequency control and phase offset control signals. The frequency control signal basically is the value, which you continuously add to the value in your accumulator register to generate a periodic sawtooth signal (due to the overflow of the accumulator). The phase offset control signal gets added to the accumulator register to enable shifting the phase of t
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