Coded data generation or conversion – Converter compensation
Patent
1997-09-15
1999-09-21
Hoff, Marc S.
Coded data generation or conversion
Converter compensation
341144, H03M 106
Patent
active
059559799
ABSTRACT:
A system and method for compensating for glitches in a D/A converter, particularly in systems where the glitch is not constant during the sample period. In the preferred embodiment of the invention, the system represents the glitch as a constant deviation during the sample period for the glitch. The system uses a compensation signal having a constant deviation with an area corresponding to the area of the glitch. This approximation in the frequency domain becomes more accurate for lower frequencies and is especially suitable in an over-sampled system. By treating and compensating the glitch as a constant deviation from the ideal signal during one sampling cycle, it is possible to cancel the spectral effects of the glitch at low frequencies. This approximation enables glitch compensation in a sampled signal.
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Candy, James C. and Temes, Gabor C., Oversampling Delta-Sigma Data Converters, 1992, pp. 192-195, 227-228.
Hoff Marc S.
Hood Jeffrey C.
National Instruments Corporation
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