Method for producing a digital sine wave signal with a given sam

Details Method for producing a digital sine wave signal with a given sam Method for producing a digital sine wave signal with a given sam

1995-02-22

1996-03-19

Wambach, Margaret Rose

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

327129, 327311, H03K 508

Patent

active

055006132

ABSTRACT:
A method for generating a digital sine wave signal having a predetermined sampling rate includes generating a pulse train with an alternating or constant amplitude sign, at a sampling frequency having a predetermined sampling rate frequency divided by 2.sup.n. An envelope curve is generated. The sampling rate is doubled. The doubling of the sampling rate is repeated until generation of a desired sine wave signal in an unfiltered spectrum of the generated signal. Undesired frequency components are filtered out. The sampling rate is optionally re-increased by oversampling a previously generated signal. A circuit configuration for carrying out the method includes a unit for generating digital sampling values. A filter for generating an envelope curve is connected downstream of the unit for generating digital sampling values. Units for raising a sampling frequency are connected downstream of the filter for generating an envelope curve. A digital filter filters the generated digital sampling values.

REFERENCES:
patent: 3579117 (1971-05-01), Norris et al.
patent: 4816830 (1989-03-01), Cooper
patent: 4937873 (1990-06-01), McAulay et al.
patent: 4943926 (1990-07-01), Guzman-Edery et al.

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