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. 29, 2017
Filed:
Jan. 19, 2015
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Michitaka Hashimoto, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A memory controller has a first input buffer that determines a data signal that is to be received, on the basis of a reference voltage, a second inputs buffer that inputs a data strobe signal that is to be received, a data latch circuit that fetches an internal data signal, which is outputted by the first input buffer, on the basis of a phase of a rising edge and a falling edge of an internal data strobe signal, which is outputted by the second input buffer, a duty ratio detection circuit that detects a duty ratio of the internal data strobe signal, and a reference voltage generating circuit that adjusts the reference voltage on the basis of the duty ratio detected by the duty ratio detection circuit.