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:
Jan. 31, 2017
Filed:
Nov. 27, 2015
Ncku Research and Development Foundation, Tainan, TW;
Himax Technologies Limited, Tainan, TW;
Soon-Jyh Chang, Tainan, TW;
Yen-Long Lee, Tainan, TW;
Chung-Ming Huang, Tainan, TW;
Yen-Chi Chen, Tainan, TW;
NCKU RESEARCH AND DEVELOPMENT FOUNDATION, Tainan, TW;
HIMAX TECHNOLOGIES LIMITED, Tainan, TW;
Abstract
A clock and data recovery (CDR) circuit is provided. A phase detection circuit receives an input signal and a clock signal to output a first voltage signal. A first comparing circuit determines whether the first voltage signal is within a voltage range to output a first up signal and a first down signal. A counting circuit updates a counting value according to the input signal and the clock signal. A second comparing circuit determines whether the counting value is within a value range to output a second up signal and a second down signal. A selection circuit outputs a second voltage signal according to the first up signal, the first down signal, the second up signal, and the second down signal. A voltage controlled oscillator outputs the clock signal according to the first voltage signal and the second voltage signal.