Patent ID: 9384817
Filing Date: 2016-07-05
CPC Classification: G11C

Claim Text:
1. A refresh signal generation circuit comprising: a refresh signal generation unit configured to generate a first preliminary refresh signal with a cycle varying according to temperature changes; a magnification adjustment unit configured to generate a second preliminary refresh signal and a third preliminary refresh signal, which have a cycle variation slope equal to the first preliminary refresh signal and have cycle magnifications different from the first preliminary refresh signal according to the first preliminary refresh signal; and a selection unit configured to output one of the first preliminary refresh signal, the second preliminary refresh signal, and the third preliminary refresh signal as a refresh signal according to a control signal, wherein, in accordance with the cycle magnifications, numbers of refresh operations to be performed according to the first preliminary refresh signal, the second preliminary refresh signal and the third preliminary refresh signal, respectively, during a predetermined period of time under an equal temperature condition are different from each other.