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:
Aug. 23, 2011
Filed:
Mar. 26, 2007
Kazuhiro Fujinuma, Ebina, JP;
Kazuhiro Yamane, Atsugi, JP;
Kazuhiro Fujinuma, Ebina, JP;
Kazuhiro Yamane, Atsugi, JP;
Anritsu Corporation, Atsugi-shi, JP;
Abstract
The object of the present invention is to provide a data decision apparatus and an error measurement apparatus which can set the phase of the clock to the optimum state with respect to the data signal without continuously sweeping of the phase, and can keep the state for a long time. The data decision apparatus according to the present invention comprises a delay device () for delaying a data signal (Dc) outputted from a decision device () by one bit, a first phase detector () for detecting a phase difference between a data signal (Db) to be inputted to the decision device () and the data signal (Dc) outputted from the decision device (), a second phase detector () for detecting a phase difference between the data signal (Dc) outputted from the decision device () and a data signal (Dd) outputted from the delay device (), a third phase detector () for outputting a base voltage with respect to the output values of the first and second phase detectors (and), and a phase controller () for controlling a phase shift amount of a variable delay device () to equalize an output value (P) of the first phase detector () to a center value between an output value (P) of the second phase detector () and the base voltage (P).