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:
Sep. 29, 2015
Filed:
Feb. 17, 2014
Ncku Research and Development Foundation, Tainan, TW;
Himax Technologies Limited, Tainan, TW;
NCKU Research and Development Foundation, Tainan, TW;
Himax Technologies Limited, Tainan, TW;
Abstract
A half-rate clock and data recovery (CDR) circuit includes a first and a second gated voltage-controlled oscillators (GVCOs) and a first and a second frequency detectors. The first frequency detector generates a first output current according to a reference signal and a second divided clock, and the second frequency detector generates a second output current according to a first divided clock and the second divided clock. A loop filter converts either the first output current or the second output current to a first control voltage to control the second clock, and generates a second control voltage according to the first control voltage to control the first clock. A lock detector receives the reference signal and the second divided clock, and accordingly generates a lock signal.