Deep Sub-Micron SRAM Design for Ultra-Low Leakage Standby Operation by Huifang Qin Doctor of Philosophy in Engineering Electrical Engineering and Computer Sciences University of California, Berkeley Professor Jan M. Rabaey, Chair Suppressing the standby current in memories is critical in low-power design. By lowering the supply voltage (VDD) to its standby limit, the data retention voltage (DRV...

This study attempts to propose an availability optimization decision support design system for repairable n-stage mixed systems, in which different combinations of subsystems, such as parallel, standby, and k-out-of-q, are connected series configuration. The enumeration method, tabu search, simulated annealing, non-equilibrium the modified redundancy allocation heuristic combined with a genetic...

Standby power is the energy consumed by appliances when they are not performing their main functions or when they are switched off. In this paper, we propose a Host-Agent based standby power control architecture in context-aware home network. The proposed architecture uses the IEEE 802.15.4 based ZigBee protocol between Host and Agent for communication and security. We have made an experiment o...

A6stmct-The Quick Paging Channel has been proposed as a method to significantly improve t h e standby times of t h e phones for the 3 6 systems. This paper looks at a way to p u t this common channel in soft handoff, thereby improving the reliability, and leading to a better standby time for the cdma2000 phones. Both the physical layer, and network implications are analyzed in detail.

Redundancy optimization problem with cost constraints is a typical problem in reliability engineering. This study investigates standby redundancy optimization problem with uncertain lifetimes and uncertain costs. Three models for optimizing different performances of a standby system are formulated. In these models, maximizing the reliability measure, maximizing the system lifetime and minimizin...

This paper deals with multi-component machine repair model having provision of warm standby units and repair facility consisting of two heterogeneous servers (primary and secondary) to provide repair to the failed units. The failure of operating and standby units may occur individually or due to some common cause. The primary server may fail partially following full failure whereas secondary se...

In this paper, we present the temperature based simulation and analysis of gate leakage current for the proposed low-stress IP3 SRAM bit cell. In CMOS technologies, cache memory occupies a large die area and this may experience different temperatures. Under temperature variations, performance of the system may degrade. Therefore, in the IP3 SRAM cell, gate leakage has been analyzed under temper...

Most of the studies on reliability characteristics of redundant systems deal with cold standby systems only. Little attention is paid on 2-out-of-3 warm standby system involving three types of failures. In this study models for mean time to system failure and availability have been developed to study the effect of failure rate on some measures of system effectiveness. Using Chapman Kolmogorov’s...

As semiconductor technology goes into the deep submicron region, the static power caused by leakage current is no longer negligible. Gated-GND circuit technique switches SRAM cells into standby mode to reduce the static power. In this paper, we studied the detailed current scenario in a Gated-GND circuit structure. Based upon the analysis, we employed a more accurate way to estimate the efficie...

Two different system configurations with warm standby components, standby switching failures, two types of failures "common cause failure and hardware failure" and general repair are compared based on the availability. The time-tofailure for each of the primary and warm standby components are assumed to follow the exponential distribution. Laplace transforms of state probability equations are d...