Device and method for ultrasonic measurement of a fluid flow rate comprising a sigma-delta band pass analog-to-digital converter
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United States of America Patent
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Feb 24, 2004
Grant Date -
N/A
app pub date -
Aug 20, 2001
filing date -
Dec 29, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ultrasound apparatus for measuring a fluid flow rate includes a processor which receives an analog signal from a receiver transducer then transforms it into a digitized signal used for determining the fluid flow rate. The processor includes a bandpass sigma-delta converter having a bandpass loop filter, and a digital-to-analog converter in a feedback loop.
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