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. 10, 2006
Filed:
Mar. 30, 2004
Applicant:
Takao Takehara, Tokyo, JP;
Inventor:
Takao Takehara, Tokyo, JP;
Assignee:
Minebea Co., Ltd., Nagano-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Resolver/Digital (R/D) converter includes an encoder output divider having a DSP generating 14-bit encoded signals Aand Bfrom a timing analysis performed during the first period of 12-bit encoded signal A. The DSP generates a selection signal output to a multiplexer to select encoded signals Aand BEor encoded signals Aand Bdepending on the rotational speed of the rotor of a resolver. Based on the selection signal, the multiplexer outputs 12-bit encoded signals Aand Bwhen the rotational speed is less than 400 rpm or greater than 1200 rpm, and outputs 14-bit encoded signals Aand Bwhen rotational speed is between 400 rpm and 1200 rpm.