| slovo | definícia |
semiconductor
(encz) | semiconductor,polovodič Pavel Machek; Giza |
semiconductor
(wn) | semiconductor
n 1: a substance as germanium or silicon whose electrical
conductivity is intermediate between that of a metal and an
insulator; its conductivity increases with temperature and
in the presence of impurities [syn: semiconductor,
semiconducting material]
2: a conductor made with semiconducting material [syn:
semiconductor device, semiconductor unit,
semiconductor] |
semiconductor
(foldoc) | semiconductor
A material, typically crystaline, which allows
current to flow under certain circumstances. Common
semiconductors are silicon, germanium, gallium arsenide.
Semiconductors are used to make diodes, transistors and
other basic "solid state" electronic components.
As crystals of these materials are grown, they are "doped"
with traces of other elements called donors or acceptors
to make regions which are n- or p-type respectively for the
electron model or p- or n-type under the hole model.
Where n and p type regions adjoin, a junction is formed which
will pass current in one direction (from p to n) but not the
other, giving a diode.
One model of semiconductor behaviour describes the doping
elements as having either free electrons or holes dangling
at the points in the crystal lattice where the doping elements
replace one of the atoms of the foundation material. When
external electrons are applied to n-type material (which
already has free electrons present) the repulsive force of
like charges causes the free electrons to migrate toward the
junction, where they are attracted to the holes in the p-type
material. Thus the junction conducts current.
In contrast, when external electrons are applied to p-type
material, the attraction of unlike charges causes the holes to
migrate away from the junction and toward the source of
external electrons. The junction thus becomes "depleted" of
its charge carriers and is non-conducting.
(1995-10-04)
|
| | podobné slovo | definícia |
semiconductors
(mass) | semi-conductors
- polovodič |
p-type semiconductor
(encz) | p-type semiconductor,polovodič typu p [el.] parkmaj |
semiconductor device
(encz) | semiconductor device, n: |
semiconductor diode
(encz) | semiconductor diode, n: |
semiconductor unit
(encz) | semiconductor unit, n: |
high power semiconductor laser technology
(czen) | High Power Semiconductor Laser Technology,HPSLT[zkr.] [voj.] Zdeněk
Brož a automatický překlad |
metal-oxide-semiconductor controlled transistor
(czen) | Metal-Oxide-Semiconductor Controlled Transistor,MCT[zkr.] [voj.] Zdeněk
Brož a automatický překlad |
n-type semiconductor
(wn) | n-type semiconductor
n 1: a semiconductor in which electrical conduction is due
chiefly to the movement of electrons |
p-type semiconductor
(wn) | p-type semiconductor
n 1: a semiconductor in which electrical conduction is due
chiefly to the movement of positive holes |
semiconductor device
(wn) | semiconductor device
n 1: a conductor made with semiconducting material [syn:
semiconductor device, semiconductor unit,
semiconductor] |
semiconductor diode
(wn) | semiconductor diode
n 1: a semiconductor that consists of a p-n junction [syn:
diode, semiconductor diode, junction rectifier,
crystal rectifier] |
semiconductor unit
(wn) | semiconductor unit
n 1: a conductor made with semiconducting material [syn:
semiconductor device, semiconductor unit,
semiconductor] |
complementary metal oxide semiconductor
(foldoc) | Complementary Metal Oxide Semiconductor
CMOS
(CMOS) A semiconductor fabrication
technology using a combination of n- and p-doped semiconductor
material to achieve low power dissipation. Any path through
a gate through which current can flow includes both n and
p type transistors. Only one type is turned on in any
stable state so there is no static power dissipation and
current only flows when a gate switches in order to charge the
parasitic capacitance.
(1999-06-04)
|
harris semiconductor ltd.
(foldoc) | Harris Semiconductor Ltd.
Address: Riverside Way, Camberley, Surrey, CU15 3YQ, UK.
Telephone: +44 (1276) 686 886. Fax: +44 (1276) 682 323.
(1995-11-21)
|
metal oxide semiconductor
(foldoc) | Metal Oxide Semiconductor
MOS
(MOS) The three materials used to form a gate
in the most common kind of Field Effect Transistor - a
MOSFET.
[Other MOS devices?]
(1996-05-27)
|
metal oxide semiconductor field effect transistor
(foldoc) | Metal Oxide Semiconductor Field Effect Transistor
(MOSFET) A Field Effect Transistor in which
the conducting channel is insulated from the gate terminal by
a layer of oxide. Therefore it does not conduct even if a
reverse voltage is applied to the gate.
(1997-02-24)
|
national semiconductor
(foldoc) | National Semiconductor
A semiconductor manufacturer, responsible for the
SC/MP, National Semiconductor 16000 and {National
Semiconductor 32000} series of microprocessors.
(2005-06-09)
|
national semiconductor 32000
(foldoc) | National Semiconductor 32000
32000
NS32000
(NS32000) The first of a series of
microprocessors from National Semiconductor. The 320xx
processors have an interface which allows coprocessors such
as FPUs and MMUs to be attached in a chain.
The 320xx was the predecessor of the Swordfish processor.
[Details?]
(1994-11-17)
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