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:
Nov. 24, 2009
Filed:
Feb. 05, 2008
Bret Roberts Dale, Jericho, VT (US);
Darin James Daudelin, Williston, VT (US);
Ryan Andrew Jurasek, S. Burlington, VT (US);
Dave Eugene Chapmen, Shelburne, VT (US);
Bret Roberts Dale, Jericho, VT (US);
Darin James Daudelin, Williston, VT (US);
Ryan Andrew Jurasek, S. Burlington, VT (US);
Dave Eugene Chapmen, Shelburne, VT (US);
Nanya Technology Corp., Kueishan, Tao-Yuan Hsien, TW;
Abstract
A system for generating an ideal rise or fall time includes: a first current source, for providing a first current; an adjustable capacitive component, coupled to the first current source, for generating an output signal according to a total capacitance controlled by a comparison signal; a signal conversion circuit, coupled to the adjustable capacitive component, for restoring charges stored in the adjustable capacitive component to a predetermined value when a voltage level of the output signal reaches a reference value to generate a clock-like signal; and a comparison circuit, coupled to the signal conversion circuit and the adjustable capacitive component, for comparing a period of the clock-like signal with a reference period of a reference clock signal and generating the comparison signal to adjust the total capacitance of the adjustable capacitive component when periods are not the same.