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:
Jun. 03, 2014
Filed:
Mar. 16, 2012
Koji Migita, Kawasaki, JP;
Kazumasa Kubotera, Kawasaki, JP;
Koji Migita, Kawasaki, JP;
Kazumasa Kubotera, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor apparatus includes a delay circuit to apply delay to an input signal, a phase detector to detect a phase of an output signal which is outputted from the delay circuit, a filter to set a range of the phase of the output signal for stable operation based on phase information outputted from the phase detector, a counter to count a number of detections of the output signal when the phase deviates from the range for stable operation, a discount controller to generate a discount signal indicating a discount number for the number counted by the counter, in accordance with an operating condition or an external factor outside the delay circuit and an error detector to determine whether or not an error of the phase of the output signal has occurred based on the number counted by the counter and a discount number indicated by the discount signal.