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:
May. 04, 2004
Filed:
Mar. 31, 2003
William L. Bucossi, Burlington, VT (US);
Bret R. Dale, Burlington, VT (US);
Darin J. Daudelin, Essex Junction, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A driver including boost circuitry for reducing tri-state delay. Boost circuitry includes boost legs ( ) and ( ) having boost delay chains ( ) and ( ), respectively. Subcircuits ( ) and ( ) may include a series of inverters or other devices to delay a tri-state enable signal (EN ) or (EN BAR) for a predetermined amount of time substantially equivalent to the time it takes for a first signal (A ) to travel from input pin A to PAD. Transient current provides a boost by discharging or charging output nodes (G ) and (G ), respectively. Boost legs ( ) and ( ) remain on for the length of time it takes for enable signal (EN ) or (EN BAR) to travel through subcircuits ( ) and ( ). The boost increases the rate of transition of output nodes (G ) and (G ) thereby reducing the delay of tri-state signal (EN ).