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:
Sep. 26, 1989
Filed:
Jul. 08, 1988
Applicant:
Inventors:
David S Coghran, Los Altos, CA (US);
Gean-Chung Hsu, Fremont, CA (US);
Assignee:
Xebec, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
318254 ; 318138 ;
Abstract
A boosted power-supply voltage is developed by the combination of three power drivers, a filter capacitor, and a Y-connected motor. Each of the power drivers includes a pair of transistors connected in a totem-pole configuration with a clamping (catch) diode connected between the collector and the emitter of the upper transistor. Rather than a power-supply voltage source, only the filter capacitor is connected to the collectors of the upper transistors, a reduced-voltage level DC power-supply voltage-source being connected to the motor-winding-common node.