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. 07, 1994
Filed:
Nov. 05, 1992
Applicant:
Inventors:
Kerry M Pierce, Fremont, CA (US);
Roger D Carpenter, Cupertino, CA (US);
Assignee:
Xilinx, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F / ; H03K / ;
U.S. Cl.
CPC ...
307263 ; 307572 ; 307592 ; 307597 ;
Abstract
The present invention reduces bounce in the power or ground supply voltages of an integrated circuit chip by gradually turning output drivers both on and off, so there is not a sharp discontinuity in current flow to an external device. Greatest current flow occurs at the middle of a transition period. The gradual turn-off at the end of a transition is achieved by feeding back voltage of the output signal to a device which controls the output driver. As output voltage approaches its final value, the output driver gradually turns off, preventing a sharp transient in the power or ground voltage of the integrated circuit chip.