H - Electricity – 03 – B
Patent
H - Electricity
03
B
328/10
H03B 21/00 (2006.01) G06F 1/03 (2006.01)
Patent
CA 2023327
PHASE ACCUMULATOR WITH DITHERED INCREMENTING OF ACCUMULATION DUE TO FINE PHASE COMPONENTS ABSTRACT OF THE DISCLOSURE A phase accumulator for accumulating digital frequency words, which, as accumulated, represent the phase of cyclic waveform of a predetermined frequency. The phase accumulator includes a coarse-component accumulator for accumulating coarse phase components of the digital frequency words; a fine- component accumulator for accumulating fine phase components of the digital frequency words; and means for incrementing the coarse-component accumulator in response to accumulation of the fine phase components. The incrementing means include means for providing a variable randomly generated value for each fine-component accumulation cycle; means for periodically sampling the accumulation of the fine phase components in relation to the randomly generated value; and means for incrementing the coarse component register for each fine- component accumulation cycle, with the phase of said incrementing being ditheredin accordance with the number of times the accumulated fine phase components exceed the randomly generated values during the sampling period. -16-
Smart & Biggar
Titan Corporation (the)
LandOfFree
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