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Applied to the gain cell embedded dynamic random access memory adaptive dynamic refresh and write voltage adjustment programs
Author: DongCunLin
Tutor: LinYinYin
School: Fudan University
Course: Microelectronics and Solid State Electronics
Keywords: Embedded dynamic random access memory Gain unit Layout optimization Augmented Capacitor Data hold time Negative voltage transmission On-chip negative voltage charge pump Monitoring unit Adaptive Dynamic Refresh Write voltage adjustment Low power consumption
CLC: TP333
Type: Master's thesis
Year: 2011
Downloads: 15
Quote: 0
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Abstract
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In this paper , a new capacitor embedded dynamic random access memory - double-barreled gain unit as the core unit , designed around the core unit with a low power refresh the characteristics of embedded dynamic random access memory . Focused on the core unit area is small, and is fully compatible with the logic process and four difficulties in its design - the data retention time is short, the operation requires a negative voltage , temperature sensitivity and vulnerability to interference characteristics of the data hold time . Launched a series of research, design and optimization for four difficulty . Through the process and layout optimization , making the data hold time increased by an average of 2 to 4 times ; design pass the vacuum circuit and on-chip negative voltage generating circuit , to solve the problem of the operation requires a negative voltage ; proposed a program based on the monitoring unit , innovation solve the data hold time problems related to interference with the temperature and the write operation , the use of this program , the memory chip can be used to adaptively adjust its self refresh frequency with changes in temperature and interference Meanwhile, according to the interference situation , to further adjust the write operation voltage, so that the data hold time over further growth in the working mode refresh average savings of 25 % to 30% power consumption in sleep mode to save refresh power consumption of 50% .
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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Electronic digital computer (not a continuous role in computer ) > Memory
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