Generation of phase related waveforms

Details Generation of phase related waveforms Generation of phase related waveforms

1990-06-21

1992-06-30

Nguyen, Long T.

Boots, shoes, and leggings

G06F 102

Patent

active

051269600

ABSTRACT:
A pair of waveforms in quadrature relation, or otherwise phase related, are generated from a single direct digital synthesizer employing a single wave lookup table memory. Successive addresses are applied to the memory representing the desired phase difference between the two waveforms plus a fractional part of the increment desired between successive samples along the waveforms. Samples are selected for reconstructing the two respective waveforms by dividing down the sampling clock and providing timing signals therefrom coincident with the correct samples.

REFERENCES:
patent: 4745628 (1988-05-01), McDavid et al.
patent: 4992743 (1991-02-01), Sheffer
patent: 4998072 (1991-03-01), Sheffer

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