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:
Feb. 24, 2015
Filed:
Mar. 29, 2012
Charles A. Neumann, Lake Forest, CA (US);
Charles A. Neumann, Lake Forest, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A controller for a DC motor comprises an output switching element configured to couple to the DC motor; an input switching element coupled to the output switching element; a pulse width modulated (PWM) signal coupled to a control terminal of the input switching element and a supply voltage applied to the output switching element. A resistive-capacitive (RC) network may be coupled to a control terminal of the output switching element, with the RC network being configured to integrate the PWM signal into a DC voltage. A first resistive network may be configured to set a bias for the output switching element when the input switching element is turned off, and a second resistive network may be configured to set the bias for the output switching element when the input switching element is turned on, such that the controller is effective to provide zero-to-full supply voltage control to the DC motor.