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:
Sep. 15, 2009
Filed:
Jul. 16, 2007
Young Ju Kim, Daejeon, KR;
Young Ju Kim, Daejeon, KR;
Hynix Semiconductor Inc., Kyoungki-do, KR;
Abstract
A semiconductor memory device with a mirror function enables two memory devices such as two DRAMs to share the same address and control signals. A pair of semiconductor memory devices are mounted on both sides of a substrate to be symmetrical to each other. A mirror function transfers a first transmission signal and a second transmission signal input on respective pads to any one of a mirror 'on' path and a mirror 'off' path. The mirror function can vary or reduce path delay differences between the mirror function “on” path and the mirror function “off” path by means of the delay and the mixture of phases in the semiconductor memory device, and reduce skew occurred in the operation of the mirror function.