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:
Oct. 08, 2013
Filed:
Aug. 20, 2012
Seung Sik Lee, Daejeon, KR;
Sangsung Choi, Daejeon, KR;
Young AE Jeon, Daejeon, KR;
Sangjae Lee, Daejeon, KR;
Byoung Hak Kim, Daejeon, KR;
MI Kyung OH, Daejeon, KR;
Cheol-ho Shin, Daejeon, KR;
Kang-yoon Lee, Seoul, KR;
Younggun Pu, Seoul, KR;
Joon-sung Park, Seoul, KR;
Seung Sik Lee, Daejeon, KR;
Sangsung Choi, Daejeon, KR;
Young Ae Jeon, Daejeon, KR;
Sangjae Lee, Daejeon, KR;
Byoung Hak Kim, Daejeon, KR;
Mi Kyung Oh, Daejeon, KR;
Cheol-ho Shin, Daejeon, KR;
Kang-yoon Lee, Seoul, KR;
YoungGun Pu, Seoul, KR;
Joon-Sung Park, Seoul, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Konkuk University Industrial Cooperation Corp., Seoul, KR;
Abstract
A digital phase-locked loop apparatus using FSK includes a PFD detecting phase differences between a reference clock and a frequency-divided signal, and a first adder for generating first digital control codes by adding first digital codes, second digital codes, and channel frequency codes including channel information to each other, the first digital codes being converted from time differences between first and second pulses. The apparatus further includes a digital filter correcting errors of the first digital control codes to generate second digital control codes, a DCO for varying an oscillating frequency in accordance with a digital tuning word based on the second digital control codes, and a dual modulus division unit dividing the oscillating frequency into a frequency-divided signal.