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In this paper, a novel multiple-tunable frequency synthesizer structure to achieve both high frequency resolution and fast switching speed without degradation of spurious performance is proposed. According to this structure, a high performance millimeter-wave frequency synthesizer with low spurious, low phase noise, and fast switching speed, is developed. This synthesizer driven by the direct digital...
Spurious frequencies (spurs) resulting from phase truncation are one of the main spectrum purity issues for direct digital synthesizers (DDS). The standard approach in DDS design consists of truncating the phase word output from the phase accumulator in order to minimize the size of the lookup table. This process generates spurs and degrades the quality of signals at the output of a DDS. The truncation...
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