Ultrasonic phase-shift detection device
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United States of America Patent
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Feb 12, 2013
Grant Date -
Feb 16, 2012
app pub date -
Sep 28, 2010
filing date -
Aug 13, 2010
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Abstract
An ultrasonic phase-shift detection device includes a clock generator, a divider, a first counter, a comparator, a phase detector and a second counter. The divider is provided for dividing the clock signal to generate ultrasonic signals. The comparator is provided for comparing the counting value of the first counter and a predetermined number. The phase detector is provided for comparing the phase shift between different ultrasonic signals. The second counter is provided for counting to generate the digital result signal.
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