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Field Programmable Gate Arrays (FPGAs) have been used widely in recent years because of their flexible reconfiguration capabilities. Moreover, demand of high-speed reconfiguration for FPGAs has been increasing. However, since reconfiguration of FPGAs cannot be increased because of the serial transfer of configuration data, new optically reconfigurable gate arrays (ORGAs) have been proposed as an alternative...
Recently, optically reconfigurable gate arrays (ORGAs), which consist of a gate array VLSI, a holographic memory, and a laser array, have been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. However, comparison of conventional ORGAs with current field programmable gate arrays (FPGAs) reveals one important shortcoming: they are not reprogrammable...
Demands for fast dynamic reconfiguration for programmable devices have increased because the fast dynamic reconfiguration can increase the number of functions on a gate array. This paper presents a proposal of a novel optically differential reconfigurable gate array architecture with a microelectromechanical system (MEMS) mirror array that enables high-speed reconfiguration by exploiting large-bandwidth...
Recently, optically reconfigurable gate arrays (ORGAs), which consist of a gate array VLSI, a holographic memory, and a laser array, have been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. Consequently, exploitation of the storage capacity of a holographic memory produces ORGAs with more than tera-gate capacity. However, comparison of conventional...
Optically reconfigurable gate arrays (ORGAs) have been developed as a type of multi-context field programmable gate array to realize fast reconfiguration and numerous reconfiguration contexts. Along with such advantages, ORGAs have particularly high defect tolerance. They consist simply of a holographic memory, a laser diode array, and a gate array VLSI. Even if a gate array VLSI includes defective...
Demand for fast dynamic reconfiguration has increased since dynamic reconfiguration can accelerate the performance of processors. Dynamic reconfiguration has two important prerequisites: fast reconfiguration and numerous reconfiguration contexts. Unfortunately, fast reconfigurations and numerous contexts share a tradeoff relation on current VLSIs. Therefore, optically reconfigurable gate arrays were...
Demand for fast dynamic reconfiguration has increased since dynamic reconfiguration can accelerate the performance of implementation circuits on a programmable device. Such dynamic reconfiguration necessitates two important features: fast reconfiguration and numerous contexts. However, because fast reconfiguration and numerous contexts share a tradeoff relation on current VLSIs, optically reconfigurable...
Recently, optically reconfigurable gate arrays (OR-GAs) consisting of a gate array VLSI, a holographic memory, and a laser array have been developed to achieve a huge virtual gate count that is much larger than those of currently available VLSIs. Consequently, ORGAs with more than tera-gate capacity will be realized by exploiting the storage capacity of a holographic memory. However, in contrast to...
The world's largest 11,424 gate-count dynamic optically reconfigurable gate array VLSI chip, which is based on the use of junction capacitance of photodiodes as configuration memory, has been fabricated. The size and process of the VLSI chip are, respectively, a 96.04 mm2 and a 0.35 mum-3 metal CMOS process technology. To clarify the availability of the VLSI, this paper shows an experimental result...
This paper presents a novel inversion / non-inversion zero-overhead dynamic optically reconfigurable gate array that can extract good factors from architectures of both optically differential reconfigurable gate arrays and dynamic optically reconfigurable gate arrays. A full VLSI design using a 0.35 mum CMOS process technology is presented. Based on that presentation, three factors are discussed:...
In previously proposed ORGAs, the optical reconfiguration period was designed to be constant by assuming a worst-case reconfiguration speed. However, the diffraction efficiency of a holographic memory differs depending on the number of bright bits included in a configuration context. Therefore, previous ORGAs can not fully exploit reconfiguration performance. For that reason, this paper presents a...
A DORGA architecture has been proposed to increase gate density. It uses the junction capacitance of photo-diodes as dynamic memory, thereby obviating the static configuration memory. This paper presents the worldpsilas largest 11,424 gate-count dynamic optically reconfigurable gate array (DORGA) VLSI fabricated on a 96.04 mm2 chip using a 0.35 mum three-metal CMOS process technology and a perfect...
Recently, to realize large real-time systems, demands for fast computation on large VLSI have continued to increase. An optically reconfigurable gate array has been developed to realize large virtual gates. As part of that research effort, the world's largest 11,424 gate-count dynamic optically reconfigurable gate array VLSI chip, which is based on a concept using junction capacitance of photodiodes...
Recently, optically reconfigurable gate arrays (ORGAs) consisting of a gate array VLSI, a holographic memory, and a laser array have been developed to achieve huge virtual gate counts that is much larger than those of currently available VLSIs. Using ORGA architecture, greater than 1 tera gate count VLSIs are possible by exploiting the storage capacity of a holographic memory. Conventional ORGAs have...
To increase gate density, a dynamic optically reconfigurable gate array (DORGA) architecture has been proposed that uses the junction capacitance of photodiodes as dynamic memory, thereby obviating the static configuration memory. To date, estimation of the DORGA architecture using a liquid crystal holographic memory has been conducted, thereby demonstrating its availability. However, because the...
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