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. 09, 2007
Filed:
Aug. 30, 2005
Daniel M. Dreps, Georgetown, TX (US);
Frank D. Ferraiolo, New Windsor, NY (US);
Daniel J. Friedman, Sleepy Hollow, NY (US);
Seongwon Kim, Old Tappan, NJ (US);
Hector Saenz, Round Rock, TX (US);
Michael A. Sperling, Poughkeepsie, NY (US);
Daniel M. Dreps, Georgetown, TX (US);
Frank D. Ferraiolo, New Windsor, NY (US);
Daniel J. Friedman, Sleepy Hollow, NY (US);
Seongwon Kim, Old Tappan, NJ (US);
Hector Saenz, Round Rock, TX (US);
Michael A. Sperling, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Delay elements and delay lines having glitchless operation are disclosed. By way of example, apparatus for delaying an input signal comprises a reference current generator for generating a constant current, wherein the constant current is insensitive to a variation of a power supply voltage, at least one variable bias voltage generator coupled to the reference current generator for generating a set of bias voltages based on the constant current generated by the reference current generator and a digitally programmable delay control input, and at least one delay element coupled to the at least one variable bias voltage generator for delaying the input signal by a constant delay which is determined by the set of bias voltages generated by the at least one variable bias voltage generator.