Digital generator for producing a sinewave

Details Digital generator for producing a sinewave Digital generator for producing a sinewave

1979-07-11

1981-08-18

Malzahn, David H.

Boots, shoes, and leggings

328 14, G06F 102

Patent

active

042850444

ABSTRACT:
A digital sinewave generator can be used in digital equipment, e.g. instead of a local oscillator for modulation/demodulation of signals. If there is no simple relationship between sampling rate and the frequency of the sinewave, successive sample values must be calculated since storage of these values would be prohibitive. For a sinewave Re.sup.jk.phi. sampled at successive instants k=0, 1, 2, . . . etc. separated by a phase angle .phi., quadrature components A.sub.k +jB.sub.k =Re.sup.jk.phi. can be calculated using the algorithm:

REFERENCES:
patent: 3649821 (1972-03-01), Gumacos
patent: 3679881 (1972-07-01), Gondeck
patent: 4159526 (1979-06-01), Mosley, Jr. et al.
patent: 4172286 (1979-10-01), Wess

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