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. 08, 2003
Filed:
Aug. 13, 2001
Ahmed Reda Fridi, Dallas, TX (US);
Abdellatif Bellaouar, Dallas, TX (US);
Sherif Embabi, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A very fast lock integer N PLL with hybrid digital coarse VCO tuning and VCO temperature drift compensation provides for a fully digital tuning scheme without the need for charge pumps. A PLL synthesizer ( ) using such a PLL design provides for very fast lock times by using an open loop step and a closed loop step. The hybrid PLL can achieve coarse tuning within four clock cycles, while minimizing any errors caused by the VCO non-linearity. Temperature tracking and compensation is also provided. A SAR implementation ( ) and an interpolation tuning implementation ( ) are also described.