Method for producing a digital sine wave signal with a given sampling rate, and circuit configuration for carrying out the method
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United States of America Patent
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Mar 19, 1996
Grant Date -
N/A
app pub date -
Feb 22, 1995
filing date -
Mar 11, 1994
priority date (Note) -
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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.
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