Built-in Self Repair for Logic Structures

2011 ◽  
pp. 216-240 ◽  
Author(s):  
Tobias Koal ◽  
Heinrich Theodor Vierhaus
Keyword(s):  
Software Systems ◽  
Gate Arrays ◽  
Regular Structures ◽  
Permanent Faults ◽  
Integrated Devices ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Self Repair ◽  
Logic Structures ◽  
Time Of Operation

For several years, many authors have predicted that nano-scale integrated devices and circuits will have a rising sensitivity to both transient and permanent faults effects. Essentially, there seems to be an emerging demand for building highly dependable hardware / software systems from unreliable components. Most of the effort has so far gone into the detection and compensation of transient fault effects. More recently, also the possibility of repairing permanent faults, due to either production flaws or to wear-out effects after some time of operation in the field of application, needs further investigation. While built-in self test (BIST) and even self repair (BISR) for regular structures such as static memories (SRAMs) is well understood, concepts for in-system repair of irregular logic and interconnects are few and mainly based on field-programmable gate-arrays (FPGAs) as the basic implementation. In this chapter, the authors try to analyse different schemes of logic (self-) repair with respect to cost and limitations, using repair schemes that are not based on FPGAs. It can be shown that such schemes are feasible, but need lot of attention in terms of hidden single points of failure.

Built-In Self Repair for Logic Structures

2014 ◽  
pp. 1376-1402
Author(s):  
Tobias Koal ◽  
Heinrich T. Vierhaus
Keyword(s):  
Software Systems ◽  
Gate Arrays ◽  
Regular Structures ◽  
Permanent Faults ◽  
Integrated Devices ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Self Repair ◽  
Logic Structures ◽  
Time Of Operation

For several years, many authors have predicted that nano-scale integrated devices and circuits will have a rising sensitivity to both transient and permanent faults effects. Essentially, there seems to be an emerging demand for building highly dependable hardware / software systems from unreliable components. Most of the effort has so far gone into the detection and compensation of transient fault effects. More recently, also the possibility of repairing permanent faults, due to either production flaws or to wear-out effects after some time of operation in the field of application, needs further investigation. While built-in self test (BIST) and even self repair (BISR) for regular structures such as static memories (SRAMs) is well understood, concepts for in-system repair of irregular logic and interconnects are few and mainly based on field-programmable gate-arrays (FPGAs) as the basic implementation. In this chapter, the authors try to analyse different schemes of logic (self-) repair with respect to cost and limitations, using repair schemes that are not based on FPGAs. It can be shown that such schemes are feasible, but need lot of attention in terms of hidden single points of failure.

Field-Programmable Gate Array

2021 ◽  
pp. 257-270
Author(s):  
Mário Pereira Véstias
Keyword(s):  
Integrated Circuits ◽  
Field Programmable Gate Array ◽  
Field Programmable Gate Arrays ◽  
Software Systems ◽  
Reconfigurable Logic ◽  
Memory Cache ◽  
Gate Arrays ◽  
Field Programmable ◽  
Programmable Device ◽  
Programmable Gate Arrays

Field-programmable gate arrays (FPGAs) are integrated circuits whose logic and their interconnections are configurable. These devices are field-programmable, that is, they can be configured by the hardware designer without any intervention of the manufacturer. Most FPGAs can be reprogrammed as many times as we want with a vast variety of digital circuits. Some recent FPGA families are system-on-chips (SoC) with one or more microprocessor cores, memory, cache, and reconfigurable logic allowing the implementation of complex hardware/software systems in a single programmable device. This article focuses on the architecture of FPGAs, including the so called SoC FPGA. It explains the main blocks of the FPGA, how they have evolved along the last decades and the perspectives of next generation FPGAs. It also describes some applicability areas and how its architecture have evolved to adapt to some of these target markets.

FPGA Auto Configuration Based on ATE

2011 ◽  
Vol 121-126 ◽  
pp. 3310-3314
Author(s):  
Qian Liu ◽  
Dan Wu
Keyword(s):  
Test Procedure ◽  
Field Programmable Gate Arrays ◽  
Boundary Scan ◽  
Functional Tests ◽  
Gate Arrays ◽  
Integrated Devices ◽  
Automated Test ◽  
Field Programmable ◽  
Programmable Gate Arrays ◽  
Scan Protocol

FPGAs (Field Programmable Gate Arrays) are highly integrated devices which can be programmed as variable functions. The application-level testing of FPGAs usually include multiple reconfigurations and relevant functional tests respectively through ATEs (Automated Test Equipments). However, test engineers are facing a tough problem to reconfigure FPGAs automatically through an ATE instead of using specific tools and download cables provided by FPGAs manufacturers. This paper takes example for XILINX Virtex-E series, presents two different methods for FPGA auto configuration based on an ATE using JTAG configuration interface and boundary-scan protocol, and accomplishes the entire auto configuration-test procedure by a single ATE.

scholarly journals FPGA-Based Controller for a Hybrid Grid-Connected PV/Wind/Battery Power System with AC Load

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2108
Author(s):  
Mohamed Yassine Allani ◽  
Jamel Riahi ◽  
Silvano Vergura ◽  
Abdelkader Mami
Keyword(s):  
Fuzzy Logic ◽  
Hybrid System ◽  
High Voltage ◽  
Field Programmable Gate Arrays ◽  
Energy System ◽  
Maximum Power ◽  
Hybrid Energy ◽  
Gate Arrays ◽  
Field Programmable ◽  
Programmable Gate Arrays

The development and optimization of a hybrid system composed of photovoltaic panels, wind turbines, converters, and batteries connected to the grid, is first presented. To generate the maximum power, two maximum power point tracker controllers based on fuzzy logic are required and a battery controller is used for the regulation of the DC voltage. When the power source varies, a high-voltage supply is incorporated (high gain DC-DC converter controlled by fuzzy logic) to boost the 24 V provided by the DC bus to the inverter voltage of about 400 V and to reduce energy losses to maximize the system performance. The inverter and the LCL filter allow for the integration of this hybrid system with AC loads and the grid. Moreover, a hardware solution for the field programmable gate arrays-based implementation of the controllers is proposed. The combination of these controllers was synthesized using the Integrated Synthesis Environment Design Suite software (Version: 14.7, City: Tunis, Country: Tunisia) and was successfully implemented on Field Programmable Gate Arrays Spartan 3E. The innovative design provides a suitable architecture based on power converters and control strategies that are dedicated to the proposed hybrid system to ensure system reliability. This implementation can provide a high level of flexibility that can facilitate the upgrade of a control system by simply updating or modifying the proposed algorithm running on the field programmable gate arrays board. The simulation results, using Matlab/Simulink (Version: 2016b, City: Tunis, Country: Tunisia, verify the efficiency of the proposed solution when the environmental conditions change. This study focused on the development and optimization of an electrical system control strategy to manage the produced energy and to coordinate the performance of the hybrid energy system. The paper proposes a combined photovoltaic and wind energy system, supported by a battery acting as an energy storage system. In addition, a bi-directional converter charges/discharges the battery, while a high-voltage gain converter connects them to the DC bus. The use of a battery is useful to compensate for the mismatch between the power demanded by the load and the power generated by the hybrid energy systems. The proposed field programmable gate arrays (FPGA)-based controllers ensure a fast time response by making control executable in real time.

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