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. 05, 2006
Filed:
Apr. 22, 2003
Masahiro Suzuki, Kanagawa, JP;
Masafumi Kikuchi, Kanagawa, JP;
Akira Fujino, Kanagawa, JP;
Mitsuru Shibasaki, Kanagawa, JP;
Hitoshi Suzuki, Kanagawa, JP;
Shun Kayama, Saitama, JP;
Masahiro Suzuki, Kanagawa, JP;
Masafumi Kikuchi, Kanagawa, JP;
Akira Fujino, Kanagawa, JP;
Mitsuru Shibasaki, Kanagawa, JP;
Hitoshi Suzuki, Kanagawa, JP;
Shun Kayama, Saitama, JP;
Sony Corporation, , JP;
Abstract
A motor driving apparatus and a driving method thereof, and a mobile terminal in which a terminal voltage value of a terminal is detected at a terminal voltage detection unit, and is held in a holding circuit. A difference between the terminal voltage value detected this time and the terminal voltage value detected last time and held in the holding circuit is calculated in a difference circuit, and the calculated difference voltage value is compared with a reference voltage value determining a rated frequency in a comparator. A synchronizing reference voltage value of a reference voltage source is controlled by a control circuit on the basis of each comparison result in the comparators and a frequency of a synchronizing reference signal specified as a basic operation time unit at the time of synchronous driving is corrected so that a stable synchronous operation condition can be obtained before a rotor of a brushless motor steps out from a synchronous operation.