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:
Aug. 16, 2011
Filed:
Nov. 22, 2002
Robert B. Staszewski, Garland, TX (US);
Dirk Leipold, Plano, TX (US);
John Wallberg, Richardson, TX (US);
Robert B. Staszewski, Garland, TX (US);
Dirk Leipold, Plano, TX (US);
John Wallberg, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An all-digital frequency synthesizer architecture is built around a digitally controlled oscillator (DCO) that is tuned in response to a digital tuning word (OTW). In exemplary embodiments: (1) a gain characteristic (K) of the digitally controlled oscillator can be determined by observing a digital control word before and after a known change (Δf) in the oscillating frequency; and (2) a portion (TUNE_TF) of the tuning word can be dithered (), and the resultant dithered portion (d) can then be applied to a control input of switchable devices within the digitally controlled oscillator.