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NPN is one of the two types of bipolar transistors, the second being PNP. The letters "N" and "P" refer to the majority charge carriers inside the different regions of the transistor. Most transistors used today are NPN, since this is the easiest and most cost effective to make from silicon. The schematic symbols for PNP- and NPN- type BJTs. ... Plug and Play is a term used in the computer field to describe a computers ability to have new devices, normally peripherals, added to it without having to restart the computer. ... General Name, Symbol, Number silicon, Si, 14 Chemical series metalloids Group, Period, Block 14, 3, p Appearance dark gray, bluish tinge Atomic mass 28. ...

NPN transistors consist of a layer of P-doped (the doping agent is often boron) semiconductor (the "base") between two N-doped (often made with arsenic) layers. NPN transistors are commonly operated with the emitter at ground and the collector at a positive voltage. Doping is generally the practice of adding impurities to something. ... General Name, Symbol, Number boron, B, 5 Chemical series metalloids Group, Period, Block 13, 2, p Appearance black/brown Atomic mass 10. ... A semiconductor is a material with an electrical conductivity that is intermediate between that of an insulator and a conductor. ... General Name, Symbol, Number arsenic, As, 33 Chemical series metalloids Group, Period, Block 15, 4, p Appearance metallic gray Atomic mass 74. ... An emitter is any device used to emit any signal, beacon, light, odor, liquid, fragrance, or the like. ... Ground symbols The term ground (or earth) usually means a common return path in electrical circuits. ... This article may be too technical for most readers to understand. ...

See also

  Results from FactBites:
National Performance Network (556 words)
NPN Partners, invited artists and colleagues, the national office is eager to see everyone in New Orleans, December 6-10, 2007.
Use the link to learn more about two new funders to NPN, The Moore Family Fund for the Arts of the Minneapolis Foundation and Center for Community Arts Partnerships at Columbia College Chicago.
Julie Simpson, an NPN director and executive director of Urban Gateways in Chicago, has passed on a notice to NPN that they are looking for a program manager.
NPN » About NPN (509 words)
NPN connects Artists with communities around two simple ideas - to help artists make work in their own neighborhoods, and to cross geographic and cultural divides to increase the traffic of fresh, challenging artistic work.
NPN also plays a critical role for mid-career and established artists who continue to create new work and to tour on the network because it offers a wealth of opportunities at a time when support is diminishing.
NPN has nurtured a generation of imaginative, progressive leadership - artists and presenters - who are committed to sustaining ongoing, pragmatic relationships that place cultural identity at the center of a community’s daily life.
  More results at FactBites »



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