Semiconductor memory device with optimum refresh cycle...

Details Semiconductor memory device with optimum refresh cycle... Semiconductor memory device with optimum refresh cycle...

2011-08-02

2011-08-02

Luu, Pho M (Department: 2824)

Static information storage and retrieval

Read/write circuit

Including signal comparison

C365S189090, C365S211000, C365S222000

Reexamination Certificate

active

07990776

ABSTRACT:
A semiconductor memory device, which performs a refresh operation, includes: a temperature sensing unit for measuring temperature and for generating a temperature controlled voltage and a reference current based on the measured temperature; an analog-digital conversion unit for converting the temperature controlled voltage to an N-bit digital signal; a refresh control unit for generating a refresh signal in response to the N-bit digital signal, wherein, a period of the refresh signal is controlled based on the N-bit digital signal.

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