METHOD AND APPARATUS OF A SENSOR AMPLIFIER CONFIGURED FOR USE IN MEDICAL APPLICATIONS
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United States of America Patent
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Issued Date -
Mar 18, 2010
app pub date -
Mar 2, 2009
filing date -
Sep 12, 2008
priority date (Note) -
Abandoned
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Abstract
A digital data bandpass filter process using digital signal processing processes raw digital data twice using distinct all-pass filters, wherein the two filters perform different frequency-dependent phase shifts of the digital content. The two filter output streams may be subtracted to remove out-of-band energy. The process produces lower levels of noise and conversion artifacts when used for filtering fixed-point data that may have low energy, and thus few non-zero bits, in the analog input signals, than conventional digital bandpass filters.
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