Gate array: Difference between revisions

Revision as of 02:05, 16 November 2022

Revision as of 04:08, 16 November 2022

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=== Development ===

Gate arrays had several concurrent development paths. [[Ferranti]] in the UK pioneered commercializing [[bipolar transistor|bipolar]] ULA technology,<ref name="bteng198307">{{ cite journal | url=https://archive.org/details/bte-198307/page/n19/mode/2up | title=The Use of Gate Arrays in Telecommunications | journal=British Telecommunications Engineering | last1=Grierson | first1=J. R. | date=July 1983 | access-date=26 February 2021 | volume=2 | issue=2 | pages=78-80 | issn=0262-401X | quote=In the UK, Ferranti, with their bipolar collector diffused isolation (CDI) arrays, pioneered the commercial use of gate arrays and for many years this was by far the most widely used technology. }}</ref> offering circuits of "100 to 10,000 gates and above" by 1983.<ref name="btj198301">{{ cite newsjournal | url=https://archive.org/details/btj-198301/page/n71/mode/1up | title=Everybody's talking about Ferranti ICs. | work=British Telecom Journal | volume=3 | issue=4 | date=January 1983 | access-date=23 January 2021 }}</ref><ref name="ferranti_quickref">{{ cite book | url=https://archive.org/details/FerrantiQ.RefULA1984/page/n1/mode/1up | title=Ferranti Discrete and Integrated Circuits Quick Reference Guide | publisher=Ferranti plc. | date=1982 | access-date=23 February 2021 | pages=IC4 }}</ref> 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.<ref name="heidelberg19821006_ics">{{ cite magazine | url=https://archive.org/details/jprs-report_jprs-82727/page/10/mode/2up | title=Great Britain Develops Semicustom and Custom ICs | magazine=Heidelberg Elektronik Industrie | date=6 October 1982 | access-date=4 March 2022 | last1=Turmaine | first1=Bradley | pages=43-46 }}</ref> 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.<ref name="bteng198610_silicon">{{ cite journal | url=https://archive.org/details/bte-198610/page/n41/mode/2up | title=Silicon Micro-Electronics at British Telecom Research Laboratories | journal=British Telecommunications Engineering | date=October 1986 | access-date=4 March 2022 | pages=230-236 }}</ref>

[[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.<ref name=":0">{{Cite web|url=http://www.computerhistory.org/siliconengine/application-specific-integrated-circuits-employ-computer-aided-design/|title=1967: Application Specific Integrated Circuits employ Computer-Aided Design|website=The Silicon Engine|publisher=[[Computer History Museum]]|access-date=2018-01-28}}</ref>

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== References ==

{{Reflist}}

==Data Books==

== External links ==

* {{Commons category-inline|Gate arrays}}

{{refbegin}}

*{{cite book |chapter=3. Uncommitted Logic Arrays |title=Quick Reference Guide: Discrete Semiconductors, Integrated Circuits, Power Mosfets |publisher=Ferranti Semiconductoras |via=Bitsavers.org |date=1983 |pages=147– |url=http://www.bitsavers.org/components/ferranti/1983_Ferranti_Quick_Reference_Guide.pdf}}

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*{{cite book |chapter=Array Based ASICS |pages=41–54 |title=Short Form Catalog 1991 |publisher=LSI Logic |via=Bitsavers.org |date=1991 |url=http://www.bitsavers.org/components/lsiLogic/_dataBooks/1991_LSI_Logic_Short_Form_Catalog.pdf |id=13000}}

{{refend}}

== External links ==

* {{Commons category-inline|Gate arrays}}

[[Category:Gate arrays| ]]