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:
Jul. 01, 2008
Filed:
Jan. 31, 2008
Justin P. Bandholz, Cary, NC (US);
Moises Cases, Austin, TX (US);
Bradley D. Herman, Cary, NC (US);
Erdem Matoglu, Austin, TX (US);
Bhyrav M. Mutnury, Austin, TX (US);
Thomas D. Pahel, Chapel Hill, NC (US);
Pravin S. Patel, Cary, NC (US);
Nam H. Pham, Round Rock, TX (US);
Christopher C. West, Raleigh, NC (US);
Justin P. Bandholz, Cary, NC (US);
Moises Cases, Austin, TX (US);
Bradley D. Herman, Cary, NC (US);
Erdem Matoglu, Austin, TX (US);
Bhyrav M. Mutnury, Austin, TX (US);
Thomas D. Pahel, Chapel Hill, NC (US);
Pravin S. Patel, Cary, NC (US);
Nam H. Pham, Round Rock, TX (US);
Christopher C. West, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A bi-directional universal serial bus ('USB') circuit for boosting a signal on a USB bus disclosed. The circuit includes a first stage inverting buffer coupled to a second stage inverting buffer to form a non-inverting buffer circuit. A high pass filter is coupled in series with the non-inverting buffer circuit to provide AC coupling to the USB bus and to allow fast signal edges through the circuit. The booster circuit is arranged to improve signal quality over a USB bus to allow additional USB devices and longer USB busses to be utilized.