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:
Nov. 11, 2003
Filed:
Aug. 30, 2000
Yuko Sonoda, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A change-over switch is disposed on a line of a peripheral device. The change-over switch is controlled by a control unit provided within a USB controller. When a host discontinues a polling operation to the peripheral device, the peripheral device first opens the circuit of the change-over switch so as to decrease the potential at a point of the host to substantially the same potential of a ground line. Then, the peripheral device closes the circuit of the change-over switch to increase the potential at the point to be close to a power supply voltage. Accordingly, the host determines that the peripheral device is reconnected to the host, and starts the polling operation. In this way, the peripheral device is apparently disconnected and reconnected, thereby allowing for recovery without the actual physical disconnection and reconnection of the peripheral device.