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:
Jul. 29, 2014
Filed:
Nov. 08, 2011
Jui-lin Hsu, Tainan, TW;
Chih-hsien Shen, Zhubei, TW;
Chunwei Chang, Taichung, TW;
Jing-hong Conan Zhan, HsinChu, TW;
Jui-Lin Hsu, Tainan, TW;
Chih-Hsien Shen, Zhubei, TW;
Chunwei Chang, Taichung, TW;
Jing-Hong Conan Zhan, HsinChu, TW;
MediaTek Inc., Hsin-Chu, TW;
Abstract
A phase locked loop is provided. The phase locked loop includes a detector, a controlled oscillator and a filtering unit coupled between the detector and the controlled oscillator. The detector generates a phase difference signal according to a reference frequency and an oscillation signal. The controlled oscillator generates the oscillation signal according to a filtered signal. The filtering unit filters the phase difference signal to generate the filtered signal, and the filtering unit has a high frequency filter of which a pole is greater than the reference frequency and less than a frequency of the oscillation signal.