Integral switched capacitor FIR filter/digital-to-analog converter for sigma-delta encoded digital audio
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United States of America Patent
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Apr 30, 1991
Grant Date -
N/A
app pub date -
Oct 4, 1989
filing date -
Oct 4, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A combined finite impulse response filter and digital-to-analog converter for converting sigma-delta over-sampled data into analog form. The filter removes out-of-band noise energy from the reconstructed analog signal resulting from the sigma-delta encoding process. The filter/converter is implemented in switched-capacitor technology. Further, a method of designing the optimum number of taps and the tap weight coefficients of the filter is given.
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