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:
Jul. 14, 2010
Seiichi Ozawa, Wako, JP;
Shuhei Yamamoto, Tokyo, JP;
Seiichi Ozawa, Wako, JP;
Shuhei Yamamoto, Tokyo, JP;
Thine Electronics, Inc., Tokyo, JP;
Abstract
A clock data restoration device (A) includes a sampler portion (), a phase comparison portion (), a drive portion (), a charge pump (), a capacitive element (), a potential adjustment portion () and a voltage control oscillator (). The phase comparison portion () outputs a signal (UP) that becomes a significant value when the phase of a clock (CKX) delays with respect to an input digital signal, and outputs a signal (DN) that becomes a significant value when the phase advances. The drive portion () increases or decreases a value δ to or from a variable Δ when the signals (UP) and (DN) become a significant value, and increases or decrease a value N to or from the variable Δ when the value of the variable Δ is equal to or more than +N or when the value of the variable Δ is equal to or less than −N, and signals (UPFRQ) and (DNFRQ) are output to the charge pump (). The potential adjustment portion () increases or decreases a potential at a first end of a capacitive element () based on the signals (UP) and (DN).