Electronics - wikipedia Electronics This article is about the technical field of electronics. For personal / home - use electronic devices, see consumer electronics. For the scientific magazine, see Electronics ( magazine ). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( July 2012 ) Surface - mount electronic components Electronics is the discipline dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors. Electronics deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes, integrated circuits, optoelectronics, and sensors, associated passive electrical components, and interconnection technologies. Commonly, electronic devices contain circuitry consisting primarily or exclusively of active semiconductors supplemented with passive elements ; such a circuit is described as an electronic circuit. Electronics is considered to be a branch of physics and electrical engineering. The nonlinear behaviour of active components and their ability to control electron flows makes amplification of weak signals possible. Electronics is widely used in information processing, telecommunication, and signal processing. The ability of electronic devices to act as switches makes digital information processing possible. Interconnection technologies such as circuit boards, electronics packaging technology, and other varied forms of communication infrastructure complete circuit functionality and transform the mixed components into a regular working system. Electrical and electromechanical science and technology deals with the generation, distribution, switching, storage, and conversion of electrical energy to and from other energy forms ( using wires, motors, generators, batteries, switches, relays, transformers, resistors, and other passive components ). This distinction started around 1906 with the invention by Lee De Forest of the triode, which made electrical amplification of weak radio signals and audio signals possible with a non-mechanical device. Until 1950 this field was called `` radio technology '' because its principal application was the design and theory of radio transmitters, receivers, and vacuum tubes. Today, most electronic devices use semiconductor components to perform electron control. The study of semiconductor devices and related technology is considered a branch of solid - state physics, whereas the design and construction of electronic circuits to solve practical problems come under electronics engineering. This article focuses on engineering aspects of electronics. Contents 1 Branches of electronics 2 Electronic devices and components 3 History of electronic components 4 Types of circuits 4.1 Analog circuits 4.2 Digital circuits 5 Heat dissipation and thermal management 6 Noise 7 Electronics theory 8 Electronics lab 9 Computer aided design ( CAD ) 10 Packaging methods 11 Electronic systems design 12 See also 13 References 14 Further reading 15 External links Branches of electronics Electronics has branches as follows : Digital electronics Analogue electronics Microelectronics Circuit design Integrated circuits Power electronics Optoelectronics Semiconductor devices Embedded systems Electronic devices and components Electronics Technician performing a voltage check on a power circuit card in the air navigation equipment room aboard the aircraft carrier USS Abraham Lincoln ( CVN 72 ). Main article : Electronic component An electronic component is any physical entity in an electronic system used to affect the electrons or their associated fields in a manner consistent with the intended function of the electronic system. Components are generally intended to be connected together, usually by being soldered to a printed circuit board ( PCB ), to create an electronic circuit with a particular function ( for example an amplifier, radio receiver, or oscillator ). Components may be packaged singly, or in more complex groups as integrated circuits. Some common electronic components are capacitors, inductors, resistors, diodes, transistors, etc. Components are often categorized as active ( e.g. transistors and thyristors ) or passive ( e.g. resistors, diodes, inductors and capacitors ). History of electronic components Further information : History of electronic engineering and Timeline of electrical and electronic engineering Vacuum tubes ( Thermionic valves ) were among the earliest electronic components. They were almost solely responsible for the electronics revolution of the first half of the twentieth century. They took electronics from parlor tricks and gave us radio, television, phonographs, radar, long - distance telephony and much more. They played a leading role in the field of microwave and high power transmission as well as television receivers until the middle of the 1980s. Since that time, solid - state devices have all but completely taken over. Vacuum tubes are still used in some specialist applications such as high power RF amplifiers, cathode ray tubes, specialist audio equipment, guitar amplifiers and some microwave devices. In April 1955, the IBM 608 was the first IBM product to use transistor circuits without any vacuum tubes and is believed to be the first all - transistorized calculator to be manufactured for the commercial market. The 608 contained more than 3,000 germanium transistors. Thomas J. Watson Jr. ordered all future IBM products to use transistors in their design. From that time on transistors were almost exclusively used for computer logic and peripherals. Types of circuits Circuits and components can be divided into two groups : analog and digital. A particular device may consist of circuitry that has one or the other or a mix of the two types. Analog circuits Main article : Analog electronics Hitachi J100 adjustable frequency drive chassis Most analog electronic appliances, such as radio receivers, are constructed from combinations of a few types of basic circuits. Analog circuits use a continuous range of voltage or current as opposed to discrete levels as in digital circuits. The number of different analog circuits so far devised is huge, especially because a ' circuit ' can be defined as anything from a single component, to systems containing thousands of components. Analog circuits are sometimes called linear circuits although many non-linear effects are used in analog circuits such as mixers, modulators, etc. Good examples of analog circuits include vacuum tube and transistor amplifiers, operational amplifiers and oscillators. One rarely finds modern circuits that are entirely analog. These days analog circuitry may use digital or even microprocessor techniques to improve performance. This type of circuit is usually called `` mixed signal '' rather than analog or digital. Sometimes it may be difficult to differentiate between analog and digital circuits as they have elements of both linear and non-linear operation. An example is the comparator which takes in a continuous range of voltage but only outputs one of two levels as in a digital circuit. Similarly, an overdriven transistor amplifier can take on the characteristics of a controlled switch having essentially two levels of output. In fact, many digital circuits are actually implemented as variations of analog circuits similar to this example -- after all, all aspects of the real physical world are essentially analog, so digital effects are only realized by constraining analog behavior. Digital circuits Main article : Digital electronics Digital circuits are electric circuits based on a number of discrete voltage levels. Digital circuits are the most common physical representation of Boolean algebra, and are the basis of all digital computers. To most engineers, the terms `` digital circuit '', `` digital system '' and `` logic '' are interchangeable in the context of digital circuits. Most digital circuits use a binary system with two voltage levels labeled `` 0 '' and `` 1 ''. Often logic `` 0 '' will be a lower voltage and referred to as `` Low '' while logic `` 1 '' is referred to as `` High ''. However, some systems use the reverse definition ( `` 0 '' is `` High '' ) or are current based. Quite often the logic designer may reverse these definitions from one circuit to the next as he sees fit to facilitate his design. The definition of the levels as `` 0 '' or `` 1 '' is arbitrary. Ternary ( with three states ) logic has been studied, and some prototype computers made. Computers, electronic clocks, and programmable logic controllers ( used to control industrial processes ) are constructed of digital circuits. Digital signal processors are another example. Building blocks : Logic gates Adders Flip - flops Counters Registers Multiplexers Schmitt triggers Highly integrated devices : Microprocessors Microcontrollers Application - specific integrated circuit ( ASIC ) Digital signal processor ( DSP ) Field - programmable gate array ( FPGA ) Heat dissipation and thermal management Main article : Thermal management of electronic devices and systems Heat generated by electronic circuitry must be dissipated to prevent immediate failure and improve long term reliability. Heat dissipation is mostly achieved by passive conduction / convection. Means to achieve greater dissipation include heat sinks and fans for air cooling, and other forms of computer cooling such as water cooling. These techniques use convection, conduction, and radiation of heat energy. Noise Main article : Electronic noise Electronic noise is defined as unwanted disturbances superposed on a useful signal that tend to obscure its information content. Noise is not the same as signal distortion caused by a circuit. Noise is associated with all electronic circuits. Noise may be electromagnetically or thermally generated, which can be decreased by lowering the operating temperature of the circuit. Other types of noise, such as shot noise can not be removed as they are due to limitations in physical properties. Electronics theory Main article : Mathematical methods in electronics Mathematical methods are integral to the study of electronics. To become proficient in electronics it is also necessary to become proficient in the mathematics of circuit analysis. Circuit analysis is the study of methods of solving generally linear systems for unknown variables such as the voltage at a certain node or the current through a certain branch of a network. A common analytical tool for this is the SPICE circuit simulator. Also important to electronics is the study and understanding of electromagnetic field theory. Electronics lab Main article : Electronic circuit simulation Due to the complex nature of electronics theory, laboratory experimentation is an important part of the development of electronic devices. These experiments are used to test or verify the engineer 's design and detect errors. Historically, electronics labs have consisted of electronics devices and equipment located in a physical space, although in more recent years the trend has been towards electronics lab simulation software, such as CircuitLogix, Multisim, and PSpice. Computer aided design ( cad ) Main article : Electronic design automation Today 's electronics engineers have the ability to design circuits using premanufactured building blocks such as power supplies, semiconductors ( i.e. semiconductor devices, such as transistors ), and integrated circuits. Electronic design automation software programs include schematic capture programs and printed circuit board design programs. Popular names in the EDA software world are NI Multisim, Cadence ( ORCAD ), EAGLE PCB and Schematic, Mentor ( PADS PCB and LOGIC Schematic ), Altium ( Protel ), LabCentre Electronics ( Proteus ), gEDA, KiCad and many others. Packaging methods Main article : Electronic packaging Many different methods of connecting components have been used over the years. For instance, early electronics often used point to point wiring with components attached to wooden breadboards to construct circuits. Cordwood construction and wire wrap were other methods used. Most modern day electronics now use printed circuit boards made of materials such as FR4, or the cheaper ( and less hard - wearing ) Synthetic Resin Bonded Paper ( SRBP, also known as Paxoline / Paxolin ( trade marks ) and FR2 ) - characterised by its brown colour. Health and environmental concerns associated with electronics assembly have gained increased attention in recent years, especially for products destined to the European Union, with its Restriction of Hazardous Substances Directive ( RoHS ) and Waste Electrical and Electronic Equipment Directive ( WEEE ), which went into force in July 2006. Electronic systems design Main article : Systems engineering Electronic systems design deals with the multi-disciplinary design issues of complex electronic devices, such as mobile phones and computers. The subject covers a broad spectrum, from the design and development of an electronic system ( new product development ) to assuring its proper function, service life and disposal. Electronic systems design is therefore the process of defining and developing complex electronic devices to satisfy specified requirements of the user. See also Book : An introduction to electronics Electronics portal Outline of electronics Atomtronics Audio engineering Broadcast engineering Computer engineering Electronic engineering Electronics engineering technology Fuzzy electronics Index of electronics articles List of mechanical, electrical and electronic equipment manufacturing companies by revenue Marine electronics Power electronics Robotics References Jump up ^ `` the definition of electronics ''. Dictionary.com. Retrieved 2018 - 03 - 17. Jump up ^ `` Electronics, Encyclopædia Britannica ''. Encyclopædia Britannica. September 2016. Archived from the original on 11 October 2016. Jump up ^ `` Electronics definition, Oxford Dictionary ''. Oxford University Press. February 2017. Archived from the original on 22 February 2017. Jump up ^ Power Electronics and Variable Frequency Drives : Technology and Applications - Wiley Online Library. doi : 10.1002 / 9780470547113. Jump up ^ Guarnieri, M. ( 2012 ). `` The age of vacuum tubes : Early devices and the rise of radio communications ''. IEEE Ind. Electron. M. 6 ( 1 ) : 41 -- 43. doi : 10.1109 / MIE. 2012.2182822. Jump up ^ Guarnieri, M. ( 2012 ). `` The age of vacuum tubes : the conquest of analog communications ''. IEEE Ind. Electron. M. 6 ( 2 ) : 52 -- 54. doi : 10.1109 / MIE. 2012.2193274. Jump up ^ Guarnieri, M. ( 2012 ). `` The age of Vacuum Tubes : Merging with Digital Computing ''. IEEE Ind. Electron. M. 6 ( 3 ) : 52 -- 55. doi : 10.1109 / MIE. 2012.2207830. Jump up ^ Sōgo Okamura ( 1994 ). History of Electron Tubes. IOS Press. p. 5. ISBN 978 - 90 - 5199 - 145 - 1. Archived from the original on 31 December 2013. Retrieved 5 December 2012. Jump up ^ Bashe, Charles J. ; et al. ( 1986 ). IBM 's Early Computers. MIT. p. 386. Jump up ^ Pugh, Emerson W. ; Johnson, Lyle R. ; Palmer, John H. ( 1991 ). IBM 's 360 and early 370 systems. MIT Press. p. 34. ISBN 0 - 262 - 16123 - 0. Jump up ^ IEEE Dictionary of Electrical and Electronics Terms ISBN 978 - 0 - 471 - 42806 - 0 Jump up ^ J. Lienig ; H. Bruemmer ( 2017 ). Fundamentals of Electronic Systems Design. Springer International Publishing. p. 1. ISBN 978 - 3 - 319 - 55839 - 4. Further reading The Art of Electronics ISBN 978 - 0 - 521 - 37095 - 0 External links Wikibooks has more on the topic of : Electronics Wikibooks has a book on the topic of : Electrical_engineering Wikisource has original text related to this article : Category : Electronics Wikiversity has learning resources about School : Electronics Wikimedia Commons has media related to Electronics. Electronics at Curlie ( based on DMOZ ) http://www.dictionary.com/browse/electronics Navy 1998 Navy Electricity and Electronics Training Series ( NEETS ) DOE 1998 Electrical Science, Fundamentals Handbook, 4 vols. Vol. 1, Basic Electrical Theory, Basic DC Theory Vol. 2, DC Circuits, Batteries, Generators, Motors Vol. 3, Basic AC Theory, Basic AC Reactive Components, Basic AC Power, Basic AC Generators Vol. 4, AC Motors, Transformers, Test Instruments & Measuring Devices, Electrical Distribution Systems BNF : cb11934822z ( data ) GND : 4014346 - 6 LCCN : sh85042383 NARA : 10640812 NDL : 00561449 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Electronics&oldid=856592804 '' Categories : Electronics Hidden categories : Articles needing additional references from July 2012 All articles needing additional references Articles with Curlie links Wikipedia articles with BNF identifiers Wikipedia articles with GND identifiers Wikipedia articles with LCCN identifiers Wikipedia articles with NARA identifiers Wikipedia articles with NDL identifiers Use dmy dates from March 2017 Talk Contents About Wikipedia Wikibooks Wikiversity Afrikaans Alemannisch Aragonés Asturianu Azərbaycanca تۆرکجه বাংলা Bân - lâm - gú Башҡортса Беларуская Беларуская ( тарашкевіца ) ‎ Български Boarisch Bosanski Brezhoneg Català Чӑвашла Cebuano Čeština Cymraeg Dansk Deutsch Eesti Ελληνικά Español Esperanto Euskara فارسی Français Frysk Furlan Gaeilge Galego 贛 語 한국어 Հայերեն हिन्दी Hrvatski Ido Bahasa Indonesia Interlingua Íslenska Italiano עברית Basa Jawa Kalaallisut ಕನ್ನಡ ქართული Қазақша Kiswahili Kreyòl ayisyen Kurdî ລາວ Latina Latviešu Lietuvių Limburgs Magyar Македонски Malagasy മലയാളം मराठी Bahasa Melayu Mirandés Монгол မြန်မာဘာသာ Nederlands नेपाली नेपाल भाषा 日本 語 Нохчийн Norsk Norsk nynorsk Occitan Oromoo Oʻzbekcha / ўзбекча ਪੰਜਾਬੀ پنجابی پښتو Patois Piemontèis Tok Pisin Plattdüütsch Polski Português Română Русиньскый Русский संस्कृतम् Sardu Scots Seeltersk Shqip Sicilianu සිංහල Simple English سنڌي Slovenčina Slovenščina کوردی Српски / srpski Srpskohrvatski / српскохрватски Basa Sunda Suomi Svenska Tagalog தமிழ் Татарча / tatarça ไทย Türkçe Українська اردو Vèneto Tiếng Việt Võro Winaray Wolof 吴语 ייִדיש Yorùbá 粵語 Zazaki Žemaitėška 中文 Kabɩyɛ Lingua Franca Nova 118 more Edit links This page was last edited on 26 August 2018, at 09 : 12 ( UTC ). 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Question: the nature of electronics as a branch of physics
Answer: The study of semiconductor devices and related technology is considered a branch of solid-state physics