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A low-voltage high-speed bulk-CMOS SRAM that operates over 100MHz at 0.5V, for the first time, is proposed. A novel 8-transistor (8T) memory cell with a complementary read port (C-RP) improves the read speed by enabling differential bit-line sensing, while the conventional 8T SRAM drives the bit line with a single read port (S-RP). The cell layout of the C-RP SRAM has point symmetry and a small area...
This paper presents the design of three static RAM cells, designed to be radiation hard. The memory cells are designed with three different approaches and layout styles. Three memory arrays, each of them made with a different cell, were designed and simulated to optimize the transistor sizes. The layout of the cells has been drawn, and parasitic elements were extracted to analyze their impact on circuit...
This document presents a compilation of results from tests performed by iRoC Technologies on SER induced by alpha particles on SRAM memories for technology nodes from 180 nm to 65 nm. The aim of this study is to establish the variation of sensitivity with technology node for SEU and MCU, and to analyze the possible influence of different designs and technological parameters at a given technology node.
Data retention power gating is a commonly used method for leakage reduction in deep submicron SRAM. However, application of such methods result into reduced stability of the SRAM bitcell. Moreover, reducing supply voltage and increasing process variation put a limitation on such usage in deep submicron processes. Present scheme describes a method to enhance stability while applying such data retention...
This paper presents an innovative structure based on 3 dimensional integration technology, where ultra thin inter layer dielectric enables a dynamic threshold voltage (VTH) control. A sequential process flow is proposed to fabricate 3D devices with dynamically tunable VTH. This ability can be exploited to design SRAMs cells with increased stability and surface density compared to planar technology...
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