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. 25, 2011
Filed:
Jan. 30, 2008
Khurram Waheed, Plano, TX (US);
Robert Bogdan Staszewski, Garland, TX (US);
John L. Wallberg, Richardson, TX (US);
Sudheer K. Vemulapalli, Allen, TX (US);
Khurram Waheed, Plano, TX (US);
Robert Bogdan Staszewski, Garland, TX (US);
John L. Wallberg, Richardson, TX (US);
Sudheer K. Vemulapalli, Allen, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An embodiment of the present invention provides a phase locked loop that operates on clock signals derived from an RF clock signal generated by the phase locked loop. A frequency reference input provides a reference clock. A controllable oscillator generates the RF clock signal. A phase detection circuit operates on the reference clock to provide digital phase error samples indicative of a phase difference between the reference clock and the RF clock. An interpolator is coupled to the phase detection circuit for performing a sample rate conversion between the reference clock and the clock derived from the RF clock signal.