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:
Oct. 22, 2002
Filed:
Jan. 31, 2001
Salvatore Nicosia, Palermo, IT;
STMicroelectronics S.r.l., Agrate Brianza, IT;
Abstract
A pre-charging circuit for the output node of an output buffer of an integrated digital system generates a first pulse for enabling the output of new data and a second pulse having a shorter duration than the first pulse for loading the new data in an output data register. The output data register is coupled to the input of the output buffer. A capacitor is connected in parallel to the load capacitance of the output node of the buffer by a pass-gate. The pass-gate is enabled by a pre-charge command corresponding to the logic AND of the second pulse and of the logic XOR of the new data and the data currently present on the output node. A driver is disabled by the first pulse for charging the capacitor to a voltage corresponding to the logic level of data belonging to the group that includes the new data and a logic inversion of the current data.