The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Sep. 02, 2009
Frederic Bonvin, Longmont, CO (US);
Ezio Galbiati, Agnadello, IT;
Frederic Bonvin, Longmont, CO (US);
Ezio Galbiati, Agnadello, IT;
STMicroelectronics, Inc., Coppell, TX (US);
STMicrolectronics S.r.l., Agrate Brianza, IT;
Abstract
An embodiment of a motor controller includes a motor driver and a signal conditioner. The motor driver is configured to generate a motor-coil drive signal having a first component at a first frequency, and the signal conditioner is coupled to the motor driver and is configured to alter the first component. For example, if the first component of the motor-coil drive signal causes the motor to audibly vibrate (e.g., 'whine'), then the signal conditioner may alter the amplitude or phase of the first component to reduce the vibration noise to below a threshold level.