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. 14, 2013
Filed:
Sep. 23, 2011
Susumu Hara, Austin, TX (US);
Adam B. Eldredge, Austin, TX (US);
Zhuo Fu, Taipei, TW;
James E. Wilson, Austin, TX (US);
Susumu Hara, Austin, TX (US);
Adam B. Eldredge, Austin, TX (US);
Zhuo Fu, Taipei, TW;
James E. Wilson, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
One or more PLLs are formed on an integrated circuit. Each PLL includes an interpolative divider configured as a digitally controlled oscillator, which receives a reference clock signal and supplies an output signal divided according to a divide ratio. A feedback divider is coupled to the output signal of the interpolative divider and supplies a divided output signal as a feedback signal. A phase detector receives the feedback signal and a clock signal to which the PLL locks. The phase detector supplies a phase error corresponding to a difference between the clock signal and the feedback signal and the divide ratio is adjusted according to the phase error.