Multiple frequency unambiguous phase detector for phacoemulsific

Details Multiple frequency unambiguous phase detector for phacoemulsific Multiple frequency unambiguous phase detector for phacoemulsific

1997-01-22

1998-12-22

Voeltz, Emanuel Todd

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

310318, 324 7649, G01R 1300

Patent

active

058527940

ABSTRACT:
A method for determining the voltage current phase relationship of a piezoelectric phacoemulsification handpiece includes the steps of obtaining an AC voltage signal corresponding to the operating AC voltage of a piezoelectric handpiece and obtaining an AC current signal corresponding to the operating AC current of the piezoelectric handpiece. From said AC current signal, onset of a current cycle is determined and after onset of the current cycle, a voltage (V.sub.I) corresponding to a time necessary for the AC current signal to reach a maximum value is produced. Also, after onset of the current cycles, a voltage (V.sub.v) corresponding to a time necessary for the AC voltage signal to reach a maximum value is produced. Using an A/D converter, a digital output (D.sub.v) corresponding to (V.sub.v) is produced and a digital output (D.sub.I) corresponding to (V.sub.I) is produced. Comparing (D.sub.v) and (D.sub.I) determines the phase relationship between the voltage and current of the piezoelectric phacoemulsification handpiece.

REFERENCES:
patent: 4954960 (1990-09-01), Lo et al.
patent: 4970656 (1990-11-01), Lo et al.
patent: 5001649 (1991-03-01), Lo et al.
patent: 5431664 (1995-07-01), Ureche et al.

Affiliated with

Also associated with

Rating

Multiple frequency unambiguous phase detector for phacoemulsific does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multiple frequency unambiguous phase detector for phacoemulsific, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple frequency unambiguous phase detector for phacoemulsific will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2055946