US 12,064,790 B2
System and method for driving an ultrasonic handpiece with a linear amplifier
Adam D. Downey, Kalamazoo, MI (US); Neal R. Butler, Acton, MA (US); and Scott A. Rhodes, North Andover, MA (US)
Assigned to Stryker Corporation, Kalamazoo, MI (US)
Filed by Stryker Corporation, Kalamazoo, MI (US)
Filed on Jul. 28, 2023, as Appl. No. 18/227,416.
Application 18/227,416 is a continuation of application No. 17/460,509, filed on Aug. 30, 2021, granted, now 11,717,853.
Application 17/460,509 is a continuation of application No. 16/589,815, filed on Oct. 1, 2019, granted, now 11,241,716, issued on Feb. 8, 2022.
Application 16/589,815 is a continuation of application No. 15/805,849, filed on Nov. 7, 2017, granted, now 10,449,570, issued on Oct. 22, 2019.
Application 15/805,849 is a continuation of application No. PCT/US2016/031651, filed on May 10, 2016.
Claims priority of provisional application 62/159,672, filed on May 11, 2015.
Prior Publication US 2023/0364642 A1, Nov. 16, 2023
Int. Cl. H02M 7/06 (2006.01); A61B 17/32 (2006.01); A61F 9/007 (2006.01); B06B 1/02 (2006.01); H03F 1/02 (2006.01); A61B 17/00 (2006.01); A61B 17/14 (2006.01); A61B 18/00 (2006.01); A61B 18/14 (2006.01); A61B 18/18 (2006.01); A61B 90/98 (2016.01); H02M 3/158 (2006.01); H03F 3/45 (2006.01)
CPC B06B 1/0253 (2013.01) [A61B 17/320068 (2013.01); A61F 9/00745 (2013.01); B06B 1/0246 (2013.01); H03F 1/0216 (2013.01); A61B 2017/00017 (2013.01); A61B 2017/0003 (2013.01); A61B 2017/00199 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/00973 (2013.01); A61B 17/142 (2016.11); A61B 2017/320069 (2017.08); A61B 2017/32007 (2017.08); A61B 2018/00029 (2013.01); A61B 2018/00577 (2013.01); A61B 18/14 (2013.01); A61B 2018/1807 (2013.01); A61B 90/98 (2016.02); A61B 2217/005 (2013.01); A61B 2217/007 (2013.01); B06B 2201/55 (2013.01); B06B 2201/76 (2013.01); H02M 3/158 (2013.01); H03F 3/45475 (2013.01); H03F 2200/541 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A control console for supplying an AC drive signal to a driver of an ultrasonic handpiece to vibrate a tip of the ultrasonic handpiece, the control console comprising:
a transformer including a primary winding having first and second opposed ends and a center tap to which a DC voltage is applied, and including a secondary winding across which the AC drive signal is developed for vibrating the tip of the ultrasonic handpiece;
first and second transistors functioning as first and second active resistors coupled to the first and second opposed ends of the primary winding respectively for developing an AC voltage across the primary winding;
a headroom monitor coupled to the first and second transistors and configured to generate a headroom signal representative of a voltage across the first and second transistors; and
a processor coupled to the headroom monitor and configured to:
adjust a target headroom voltage for the first and second transistors based on a voltage of the AC drive signal; and
regulate the AC voltage developed across the primary winding based on the headroom signal and the adjusted target headroom voltage.