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. 06, 2004
Filed:
Feb. 26, 1999
Lloyd P. Matthews, Buda, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
An output buffer ( ) contains a low voltage driver ( ), a medium voltage driver ( ), and a high voltage driver ( ). When an output pad ( ) is configured to operate between ground and the medium voltage, the low voltage driver ( ) is first used during low-to-high transitions to drive the output pad ( ) from ground to an intermediate voltage in a fast manner. After the intermediate voltage is obtained on the output pad ( ), a detection circuit ( ) will switch output pad control from the low voltage driver ( ) to the medium voltage driver ( ). The medium voltage driver ( ) will drive the output pad ( ) from the intermediate voltage to the final logic one output voltage. This two-stage low-to-high driving methodology ensures that there will be less delay time from input (DO) to the output pad ( ). In addition, the drivers ( ) and ( ) contain protection transistors ( ), ( ), and ( ) that allow programming on reset to be accomplished in an error free manner through use of the output pad ( ) as an input during reset operations.