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:
Jan. 06, 2009
Filed:
Dec. 29, 2006
Jong-yeol Yang, Gyeonggi-do, KR;
Tae-woo Kwon, Gyeonggi-do, KR;
Jong-Yeol Yang, Gyeonggi-do, KR;
Tae-Woo Kwon, Gyeonggi-do, KR;
Hynix Semiconductor Inc., , KR;
Abstract
A semiconductor memory integrated circuit for controlling a refresh operation includes: a first period generating unit that generates a first periodic signal having an uniformed period; a second period generating unit that generates a second periodic signal according to a first control signal; a period generation control unit that generates a timing signal for every predetermined period; a frequency dividing unit that divides the frequency of the first periodic signal into at least one frequency-divided periodic signals; and a period selection control unit that controls the operation of the second period generating unit according to the at least one frequency-divided periodic signals and the second periodic signal, determines temperature, and outputs one of the frequency-divided periodic signals corresponding to the determined temperature as a refresh signal.