Digital oscillator using lookup table with multiple cycles

Details Digital oscillator using lookup table with multiple cycles Digital oscillator using lookup table with multiple cycles

1997-10-01

1999-08-10

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

327119, 327129, 36471803, H03B 2100

Patent

active

059364386

ABSTRACT:
A digital waveform oscillator generates digitized waveforms without distortion using a lookup table. The frequencies which may be generated using direct lookup tables at their fundamental table frequencies are increased according to this invention by including multiple cycles of the waveform within a single table. The selection of a table length L and a number of cycles N to be stored in a lookup table is done in a manner to optimize corresponding values of the frequencies to be generated and the sample rate.

REFERENCES:
patent: 4998072 (1991-03-01), Sheffer
patent: 5031131 (1991-07-01), Mikos
patent: 5034977 (1991-07-01), Chen et al.
patent: 5126960 (1992-06-01), Thong
patent: 5198779 (1993-03-01), Bruton
patent: 5363443 (1994-11-01), Petty

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