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:
Feb. 24, 2004
Filed:
Mar. 27, 2002
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A semiconductor memory device input circuit including a clock selection portion. The clock selection portion receives an internal clock signal before a data strobe signal is enabled. The input circuit includes a plurality of input buffers, a clock selection circuit, a calibration circuit, and a plurality of data registers. The clock selection circuit receives a selection signal that is maintained at a first logic level for a predetermined time from the time when power is initially supplied and has a second logic level. The clock selection circuit selects a first clock signal and outputs the first clock signal as a second clock signal when the selection signal is maintained at the first logic level. The clock selection circuit selects the data strobe signal and outputs the data strobe signal as the second clock signal when the selection signal is maintained at the second logic level.