The first semiconductor chips held two transistors each. Subsequent advances added more and more transistors, and, as a consequence, more individual functions or systems were integrated over time. Current technology has moved far past this mark and today’s microprocessors have many millions of gates and billions of individual transistors.<\/span><\/p>\n

A typical digital design flow is as follows:<\/span><\/p>\n

Specification
\nArchitecture
\nRTL Coding
\nRTL Verification
\nSynthesis
\nBackend
\nTape Out to Foundry to get end product\u2026.a wafer with repeated number of identical Ics.<\/p>\n

A typical analog design flow is as follows:<\/span><\/p>\n

In case of analog design, the flow changes somewhat.
\nSpecifications
\nArchitecture
\nCircuit Design
\nSPICE Simulation
\nLayout
\nParametric Extraction \/ Back Annotation
\nFinal Design
\nTape Out to foundry.<\/p>\n

MOST OF TODAY\u2019S VLSI DESIGNS ARE CLASSIFIED INTO THREE CATEGORIES:<\/p>\n

<\/p>\n

$\"vlsi\"$ <\/a>

i<\/p><\/div>\n<\/div>\n

1. Analog:\u00a0<\/span>
\nSmall transistor count precision circuits such as Amplifiers, Data converters, filters, Phase Locked Loops, Sensors etc.<\/p>\n

2. ASICS or Application Specific Integrated Circuits:\u00a0<\/span>
\nProgress in the fabrication of IC’s has enabled us to create fast and powerful circuits in smaller and smaller devices. This also means that we can pack a lot more of functionality into the same area. The biggest application of this ability is found in the design of ASIC’s. These are IC’s that are created for specific purposes – each device is created to do a particular job, and do it well. The most common application area for this is DSP – signal filters, image compression, etc. To go to extremes, consider the fact that the digital wristwatch normally consists of a single IC doing all the time-keeping jobs as well as extra features like games, calendar, etc.<\/p>\n

3. SoC or Systems on a chip:\u00a0<\/span>
\nThese are highly complex mixed signal circuits (digital and analog all on the same chip). A network processor chip or a wireless radio chip is an example of an SoC.<\/p>\n","protected":false},"excerpt":{"rendered":"

VLSI (Very-large-scale integration) is a process that means to create integrated circuits by combining thousands of transistor-based circuits into a single chip. VLSI began in the 1970s when complex semiconductor and communication technologies were being developed. The microprocessor is a VLSI device. Nearly all modern chips employ VLSI architectures. The first semiconductor chips held two […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[298,336,72,334,335,329],"class_list":["post-107","post","type-post","status-publish","format-standard","hentry","category-vlsi","tag-best-be-majorminor-training-in-bhopal","tag-online-vlsi-design-tutorials","tag-verilog-training","tag-vhdl-training-in-bhopal","tag-vlsi-training-in-bhopal","tag-vlsivhdl-training-in-bhopal"],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/posts\/107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/comments?post=107"}],"version-history":[{"count":10,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/posts\/107\/revisions"}],"predecessor-version":[{"id":3839,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/posts\/107\/revisions\/3839"}],"wp:attachment":[{"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/media?parent=107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/categories?post=107"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dstarena.com\/blog\/wp-json\/wp\/v2\/tags?post=107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}