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:
Nov. 18, 2008
Filed:
Oct. 25, 2006
Jun-hyun Chun, Gyeonggi-do, KR;
Jun-Hyun Chun, Gyeonggi-do, KR;
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Abstract
A semiconductor memory apparatus which can restrict a refresh operation for a period when an internal clock is synchronized with an external clock. The semiconductor memory apparatus includes a refresh control unit that disables a refresh command signal which is applied during a period when an enable signal is enabled but a lock-completion signal is not enabled in response to the enable signal outputted from a mode register, the lock-completion signal outputted from a clock synchronizing unit, and the refresh command signal outputted from a command decoder. The clock synchronizing unit can stably complete a locking operation within a predetermined time regardless of power-supply noise and so on.