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. 08, 2013
Filed:
May. 19, 2009
Tsung-hsi Lee, Taipei, TW;
Hung-jen Tsai, Taipei, TW;
Tsung-Hsi Lee, Taipei, TW;
Hung-Jen Tsai, Taipei, TW;
Inventec Corporation, Taipei, TW;
Abstract
A circuit for detecting a clock has a plurality of first transmission elements, a plurality of first exclusive OR gates and a first AND gate. Each first transmission element is coupled to a last first transmission element for receiving output data, and the data received by each first transmission element is transmitted to an input terminal of a next first transmission element. In addition, the input of a first transmission element is coupled to a clock source for receiving a predetermined clock signal of which a frequency is less than a frequency of a local clock signal. Furthermore, the first and second input terminals of a kexclusive OR gate are coupled to output terminals of a kand a (k+1)first transmission elements, wherein k is an integer greater than 0 smaller than a total number of the first transmission elements.