Gate array

Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?

Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.

Découvrez-en plus sur les applications Graph.

A gate array is an approach to the design and manufacture of application-specific integrated circuits (ASICs) using a prefabricated chip with components that are later interconnected into logic devices (e.g. NAND gates, flip-flops, etc.) according to custom order by adding metal interconnect layers in the factory. It was popular during the upheaval in the semiconductor industry in the 1980s, and its usage declined by the end of the 1990s. Similar technologies have also been employed to design and manufacture analog, analog-digital, and structured arrays, but, in general, these are not called gate arrays. Gate arrays have also been known as uncommitted logic arrays (ULAs), which also offered linear circuit functions, and semi-custom chips. Gate arrays had several concurrent development paths. Ferranti in the UK pioneered commercializing bipolar ULA technology, offering circuits of "100 to 10,000 gates and above" by 1983. The company's early lead in semi-custom chips, with the initial application of a ULA integrated circuit involving a camera from Rollei in 1972, expanding to "practically all European camera manufacturers" as users of the technology, led to the company's dominance in this particular market throughout the 1970s. However, by 1982, as many as 30 companies had started to compete with Ferranti, reducing the company's market share to around 30 percent. Ferranti's "major competitors" were other British companies such as Marconi and Plessey, both of which had licensed technology from another British company, Micro Circuit Engineering. A contemporary initiative, UK5000, also sought to produce a CMOS gate array with "5,000 usable gates", with involvement from British Telecom and a number of other major British technology companies. IBM developed proprietary bipolar master slices that it used in mainframe manufacturing in the late 1970s and early 1980s, but never commercialized them externally. Fairchild Semiconductor also flirted briefly in the late 1960s with bipolar arrays diode–transistor logic and transistor-transistor logic called Micromosaic and Polycell.

À propos de ce résultat

Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.

Publications associées (1)

Concepts associés (17)

Cours associés (3)

Séances de cours associées (29)

EE-110: Logic systems (for MT)

Ce cours couvre les fondements des systèmes numériques. Sur la base d'algèbre Booléenne et de circuitscombinatoires et séquentiels incluant les machines d'états finis, les methodes d'analyse et de syn

EE-429: Fundamentals of VLSI design

The course introduces the fundamentals of digital integrated circuits and the technology aspects from a designers perspective. It focuses mostly on transistor level, but discusses also the extension t

EE-320: Analog IC design

Introduction to the design of analog CMOS integrated circuits at the transistor level. Understanding and design of basic structures.

Gate array

Complex programmable logic device

A complex programmable logic device (CPLD) is a programmable logic device with complexity between that of PALs and FPGAs, and architectural features of both. The main building block of the CPLD is a macrocell, which contains logic implementing disjunctive normal form expressions and more specialized logic operations. Some of the CPLD features are in common with PALs: Non-volatile configuration memory. Unlike many FPGAs, an external configuration ROM isn't required, and the CPLD can function immediately on system start-up.

Ordinateur domestique

vignette|Enfants jouant sur un ordinateur Amstrad CPC464. Un ordinateur domestique était un type de micro-ordinateur qui est apparu en 1977 est qui est devenu courant dans les années 1980. L'ordinateur domestique était commercialisé auprès des consommateurs comme un ordinateur abordable et accessible qui, pour la première fois, était destiné à l'usage d'un seul utilisateur non technique. Ces ordinateurs constituaient un segment de marché distinct et coûtaient généralement beaucoup moins cher que les ordinateurs commerciaux, scientifiques ou d'ingénierie de l'époque, tels que ceux fonctionnant sur CP/M ou le PC IBM.

Périphériques logiques programmables : PAL, GAL, CPLD EE-110: Logic systems (for MT)

Couvre PAL, GAL, CPLD, et l'évolution vers les FPGA, en expliquant leur architecture et leurs avantages.

Périphériques logiques programmables : PAL, GAL, CPLD EE-110: Logic systems (for MT)

Couvre PAL, GAL, CPLD et la transition vers les FPGA en utilisant des HDL.

Architecture FPGA : LUT et Arrays de routage EE-110: Logic systems (for MT)

Explore l'architecture FPGA, y compris les LUT et les réseaux de routage, l'évolutivité et les défis de placement.

IC place and route for semi-custom arrays

IC place and route for semi-custom arrays