Direct digital synthesis

Direct digital synthesis (DDS) is a method employed by frequency synthesizers used for creating arbitrary waveforms from a single, fixed-frequency reference clock. DDS is used in applications such as signal generation, local oscillators in communication systems, function generators, mixers, modulators,^[1] sound synthesizers and as part of a digital phase-locked loop.^[2]

Crystal oscillator

Digital synthesizer

Digital-to-analog converter

Numerically controlled oscillator

Reconstruction filter

Table-lookup synthesis

wavetable synthesis

(From Analog Devices)

Tutorial on Digital Signal Synthesis

L. Cordesses, IEEE Signal Processing Magazine, DSP Tips & Tricks column, pp. 50–54, Vol. 21, No. 4 July 2004.

"Direct Digital Synthesis: A Tool for Periodic Wave Generation (Part 1)"

L. Cordesses, IEEE Signal Processing Magazine, DSP Tips & Tricks column, pp. 110–117, Vol. 21, No. 5, Sep. 2004.

Direct Digital Synthesis: A Tool for Periodic Wave Generation (Part 2)

Jouko Vankka & Kari A.I. Halonen (2010). Direct Digital Synthesizers: Theory, Design and Applications. The Kluwer international series in Engineering and Computer Science. Boston, MA: Kluwer Academic Publishers. 978-1-4419-4895-3.