It's an ultra-high speed Direct Digital frequency-Synthesizer (DDS)
with clock frequency of more than 5GHz. The architecture is
ROM-less with a sine-weighted nonlinear DAC insteading of the
traditional ROM for phase-magnitude convertion. While this can
improve the speed of taotal DDS circuit, it can't give as high SFDR
as ROM-with architecture does. However, look at the output wave,
with 5GHz clock frequency and Frequency-Control-Word of 1, the
simulation result show a well-look 19....
The integrated 3D electromagnetic analysis capabilities in
Advanced Design System 2008, Update 2, eliminate the need for
standalone EM tools and improve productivity. Credit: Agilent
EEsof.
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