Method and apparatus for non-invasive assessment of ripple cancellation filter
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United States of America Patent
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Apr 2, 2019
Grant Date -
Jun 30, 2016
app pub date -
Dec 30, 2014
filing date -
Dec 30, 2014
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Abstract
A method that includes deriving a first power spectral density function of a signal input to a ripple cancellation filter; deriving a second power spectral density function of a signal concurrently output from the ripple cancellation filter; frequency shaping the first power spectral density according to a spectral rejection image of the ripple cancellation filter to obtain a test power spectral density; and indicating a degraded performance of the ripple cancellation filter in the event that the test and second power spectral density functions fail to match within pre-determined criteria.
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