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:
Apr. 22, 2008
Filed:
Oct. 27, 2005
Luis DE LA Torre, Daganzo de Arriba, ES;
Luis de la Torre, Daganzo de Arriba, ES;
Agere Systems Inc., Allentown, PA (US);
Abstract
In accordance with the invention, feed forward compensation of jitter induced by power supply noise is incorporated into the negative feedback control loop of a timing synchronization circuit, such as a phase locked loop or delay locked loop. More particularly, the dependence of the circuitry in the negative feedback loop, such as the delay elements in a DLL or the oscillator in a PLL, to fluctuations in the power supply are counteracted by introducing into the feedback loop a signal component that is a function of the supply voltage and that will have the opposite effect from any direct fluctuations in the power supply voltage.