Digital phase lock loop stimulation generator
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United States of America Patent
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Nov 7, 1995
Grant Date -
N/A
app pub date -
Nov 22, 1991
filing date -
Nov 22, 1991
priority date (Note) -
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Abstract
A system for controlling the formation of droplets in a fluid stream includes a continuously flowing fluid stream through a droplet generator. The system further includes both a sinusoidal drive voltage at a predetermined frequency and a plurality of piezo electric crystals for causing the droplet generator to resonate and inducing a series of uniformly sized droplets to separate at regular intervals from the droplet generator. Finally, the system includes a drive signal for adjusting to the resonance of the droplet generator to control the formation of the droplets. The drive signal is applied to the crystals by a digital phase lock loop.
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