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This work compares two fault tolerance techniques, Hamming code and Triple Modular Redundancy (TMR), that are largely used to mitigate Single Event Upsets in integrated circuits, in terms of area and performance penalty. Both techniques were implemented in VHDL and tested in two target applications: arithmetic circuits with pipeline and registers files.(More)
  • Roger Reis
  • 2008 3rd International Conference on Design and…
  • 2008
The research and development of the design automation of integrated circuits started by the layout level and it evolved to higher levels of abstraction. At physical design level the evolution of automation was remained at the standard cell approach, where the layout of the cells are designed and included in a cell library. So, the design of the cell layout(More)
Interior gateway routing protocols like OSPF (Open Shortest Path First) and DEFT (Distributed Exponentially-Weighted Flow Splitting) send flow through forward links towards the destination node. OSPF routes only on shortest-weight paths, whereas DEFT sends flow on all forward links, but with an exponential penalty on longer paths. Finding suitable weights(More)
This paper presents a prototype of a hardened version of the 8051 micro-controller, able to assure reliable operation in the presence of bit flips caused by radiation. Aiming at avoiding such faults in the 8051 micro-controller, Hamming code protection was used in its SRAM memory and registers. This paper shows implementation details of this technique in(More)
The availability of multimillion Commercial-Off-TheShelf (COTS) Field Programmable Gate Arrays (FPGAs) is making now possible the implementation on a single device of complex systems embedding processor cores as well as huge memories and ad-hoc hardware accelerators exploiting the programmable logic (Systems on Programmable Chip, or SoPCs). When deployed in(More)
To use interior gateway protocols like OSPF (Open Shortest Path First, [6]), IS-IS (Intermediate SystemIntermediate System), and DEFT (Distributed Exponentially-weighted Flow Splitting, [7]) it is necessary to set the link weights to allow data routing. The problem of finding suitable weights for these protocols is known as the weight setting problem.(More)
This paper presents the design of SisECO, an echo-cancelling integrated circuit for ISDN modems operating in base band. The FIR adaptative filtering is the main function of the chip. The adaptation algorithm used is the LMS (Least Mean Square) type. The paper approaches the echo cancelling problem and presents the whole design flow, including the(More)
Identifying critical nodes in a graph is important to understand the structural characteristics and the connectivity properties of the network. In this paper, we focus on detecting critical nodes, or nodes whose deletion results in maximum disconnectivity of the graph. This problem, known as the CRITICAL NODE DETECTION PROBLEM has applications in several(More)