Digital phase lock loop stimulation generator

Details Digital phase lock loop stimulation generator Digital phase lock loop stimulation generator

1991-11-22

1995-11-07

Wong, Peter S.

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G01D 1518

Patent

active

054651093

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.

REFERENCES:
patent: 4473830 (1984-09-01), Piatt et al.
patent: 4897666 (1990-01-01), Katerberg et al.
patent: 4999647 (1991-03-01), Wood et al.

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