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:
Oct. 14, 2014
Filed:
Jun. 10, 2011
Tsutomu Shimazaki, Oizumi-Machi, JP;
Akira Suzuki, Oizumi-Machi, JP;
Takeshi Arai, Oizumi-Machi, JP;
Tsutomu Shimazaki, Oizumi-Machi, JP;
Akira Suzuki, Oizumi-Machi, JP;
Takeshi Arai, Oizumi-Machi, JP;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
A motor drive circuit includes: a digital filter configured to attenuate amplitude in a frequency band including a resonance frequency of an actuator in a target current signal, the target current signal being a digital signal indicative of a target value of a drive current, the drive current being supplied to a voice coil motor configured to drive the actuator; a digital-analog converter configured to convert an output signal of the digital filter into an analog signal, and output the converted analog signal as a current control signal; and a drive circuit configured to supply the drive current to the voice coil motor according to the current control signal.