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:
Jan. 17, 2012
Filed:
Sep. 24, 2007
Makoto Nagano, Tokyo, JP;
Makoto Nagano, Tokyo, JP;
Oki Semiconductor Co., Ltd., , JP;
Abstract
A USB test circuit for use in a USB device such as a system LSI with a USB function for testing the USB function generates and outputs a packet to be measured for a signal quality test. In the test circuit, a test signal including a test_sin signal carrying operation mode information is inputted via a serial interface to a serial interface block, and a packet to be measured is generated by a data pattern generation block and a transmission data delivery block depending on the operation mode information. The packet to be measured is outputted via a UTMI interface to a USB PHY layer. Thus, a packet to be measured for a signal quality test is generated and outputted without receiving packets not to be measured such as a SETUP packet and a DATA packet, thereby reducing the test time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile