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. 29, 2010
Filed:
Oct. 19, 2006
Robert B. Staszewski, KJ Delft, NL;
John Wallberg, Richardson, TX (US);
Robert B. Staszewski, KJ Delft, NL;
John Wallberg, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A novel apparatus for and method of acquisition and tracking bank cooperation in a digitally controlled oscillator (DCO) within an all digital phase locked loop (ADPLL). The acquisition bits of the acquisition bank are used as an extension of the modulation range. The PLL and TX tuning data are broken up (i.e. apportioned) into acquisition components and tracking components. This permits the use of two different capacitor banks (i.e. the tracking and acquisition banks) for modulation rather than just a single capacitor bank as in the prior art schemes. Incorporating the tracking and acquisition bit varactors, the cooperation scheme of the present invention permits the re-centering of the tracking bank to handle natural frequency drift of the DCO and the widening of the modulation range.