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:
Jun. 22, 2004
Filed:
Aug. 08, 2002
Applicant:
Inventors:
Gary D. Carpenter, Austin, TX (US);
Francis Chan, Williston, VT (US);
Kevin J. Nowka, Round Rock, TX (US);
Hongfei Wu, Colchester, VT (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/90175 ;
U.S. Cl.
CPC ...
H03K 1/90175 ;
Abstract
An I/O driver comprising: a circuit adapted to be powered by a first power supply. The circuit is adapted to receive a first signal referenced to the voltage of a second power supply and is adapted to convert the first signal to a second signal of the same logical value as the first signal and referenced to the voltage of the first power supply. The circuit is adapted to maintain the second signal on an output of the I/O driver when the second power supply is powered off.