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. 19, 2014
Filed:
May. 23, 2013
National Chiao Tung University, Hsinchu, TW;
Wei-Zen Chen, Hsinchu, TW;
Yan-Ting Wang, Hsinchu, TW;
National Chiao Tung University, Hsinchu, TW;
Abstract
The PLL includes a voltage-controlled oscillator (VCO), a frequency down conversion circuit, a phase-frequency detector (PFD), and an adjusting circuit. The VCO is configured to generate an output clock signal. The frequency down conversion circuit is configured to receive the output clock signal and an auxiliary clock signal, and to mix the output clock signal and the auxiliary clock signal to generate a feedback clock signal. By detecting the strength of the feedback clock signal, it provides an auxiliary signal to adjust the frequency of the output clock signal. The PFD is configured to compare the frequencies and the phases of the feedback clock signal and a reference clock signal to generate an adjusting signal. The adjusting circuit is configured to receive the adjusting signal, and to adjust the frequency of the output clock signal generated by the VCO according to the adjusting signal.