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. 21, 2021
Filed:
Apr. 17, 2020
Seiko Epson Corporation, Tokyo, JP;
Kota Muto, Matsumoto, JP;
Toshimichi Yamada, Chino, JP;
Abstract
A circuit device includes a packet output circuit configured to amplify a current for a packet and output the packet to a USB-compliant bus, a detection circuit configured to detect whether an amplitude level of the packet transmitted to the bus has exceeded a disconnection detection level for a prescribed time period, a determination circuit configured to set a current for an EOP of an SOF packet output by the packet output circuit to lower than a current for a section other than the EOP, and when it is detected, by the detection circuit, that an amplitude level of the EOP has exceeded the disconnection detection level, determine that a device that was connected to the bus is disconnected.