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:
May. 11, 2010
Filed:
Nov. 02, 2007
Xingdong Dai, Bethlehem, PA (US);
Yasser Ahmed, Macungie, PA (US);
Christopher J. Abel, Coplay, PA (US);
Shawn Michael Logan, Andover, MA (US);
Xingdong Dai, Bethlehem, PA (US);
Yasser Ahmed, Macungie, PA (US);
Christopher J. Abel, Coplay, PA (US);
Shawn Michael Logan, Andover, MA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
The present invention implements an apparatus for calibrating a phase locked loop (PLL) circuit. The apparatus includes a detector for detecting frequencies of a reference signal and a controlled oscillator contained in the PLL circuit. The detector outputs the frequency difference to a control circuit. The control circuit is programmed to adjust one or more control signals to the controlled oscillator based upon the frequency difference in an orderly fashion to complete the calibration process.