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Electronics (EN-FR)



EN-FR FR-EN | 1 | A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Z bus matrix

EN: Z bus matrix, bus impedance matrix
FR: matrice des impédances à  vide, matrice des impédances nodales
Definition EN: an inverse bus admittance matrix
Definition FR: inverse de la matrice des admittances nodales

z component

EN: z component
FR: composante Z
Definition FR: composante magnéto-ionique qui se réfléchit à  l'altitude où la densité électronique et le champ magnétique terrestre sont tels qu'indiqué dans la norme NF C 01-061

Z marker beacon

EN: Z marker beacon
FR: radioborne type Z
Definition EN: in aviation,a form of marker beacon radiating a narrow conical beam along the vertical axis of the cone of silence of a track beacon
Definition FR: radioborne produisant un faisceau conique très étroit dans l'axe vertical de la zone de silence d'un radiophare d'alignement

z-matrix

EN: z-matrix
FR: matrice z
Definition EN: array of the terms,each having the dimension of impedance,that normally characterized certain properties of an electrical network

z-parameter

EN: z-parameter
FR: paramètre z
Definition EN: relationship having the dimensions of impedance,partially defining the electrical relationships at the terminals of a two-port network

Z-Theta chart

EN: Z-Theta chart
FR: abaque Z-Théta
Definition EN: graphical representation in polar coordinates of the amplitude reflection factor r,for a lossless uniform transmission line with characteristic impedance Z0:in terms of the complex impedance Z by two families of orthogonal circles on each of which either the modulus Z or the argument Theta has a constant value,where Z = Z/Theta is the complex impedance in the direction of propagation of the incident wave at the point at which the amplitude reflection factor is evaluated
Definition FR: représentation graphique en coordonnées polaires du facteur de réflexion complexe r, pour une ligne de transmission uniforme sans pertes, d'impédance caractéristique Z0:en fonction de l'impédance complexe Z, à  l'aide de deux familles de cercles orthogonaux sur chacun desquels soit le module Z soit l'argument Thêta a une valeur constante, Z = Z/Thêta étant l'impédance complexe dans la direction de propagation de l'onde incidente au point de détermination du facteur de réflexion complexe

Z-transform

EN: Z-transform
FR: transformée en Z
Definition EN: Laplace transform of a periodically sampled signal with change of variable Z = e power Ts,where T is the sampling period
Definition FR: transformée de Laplace d'un signal échantillonné périodiquement, avec changement de variable Z = e puissance Ts où T est la période d'échantillonnage

Z-transform

EN: Z-transform
FR: transformée en Z
Definition EN: Laplace transform of a periodically sampled signal with change of variable Z = e power Ts,where T is the sampling period
Definition FR: transformée de Laplace d'un signal échantillonné périodiquement, avec changement de variable Z = e puissance Ts où T est la période d'échantillonnage

z-transform one-sided

EN: z-transform one-sided
FR: transformée en Z unilatérale
Definition FR: transformée d'un signal échantillonné périodiquement avec la période t, exprimée sous la forme:(expression mathématique)

Zener breakdown

EN: Zener breakdown
FR: claquage par effet Zener
EN: tunnel breakdown
FR: claquage par effet tunnel
EN: Zener breakdown of a PN junction
FR: tension de rupture de Zener
Definition EN: the breakdown caused by the transition of electrons from the valence band to the conduction band due to tunnel action under the influence of a strong electric field in the reverse direction
Definition FR: claquage provoqué par le passage d'électrons de la bande de valence à  la bande de conduction par effet tunnel sous l'influence d'un champ électrique intense ;effet de claquage non destructif d'une jonction p-n polarisée en inverse

Zener characteristic

EN: Zener characteristic
FR: caractéristique de Zener
Definition EN: rapid increase in current in the reverse direction of a p-n junction,resulting wholly or in part from the Zener effect

Zener current

EN: Zener current
FR: courant de Zener
Definition EN: current through a p-n junction resulting from the Zener effect; i.e. ,the extra current flowing as a result of Zener breakdown

Zener diode

EN: Zener diode, avalanche diode, breakdown diode
FR: diode Zener
Definition EN: a diode with the characteristic of showing sharp increase of reverse current at a certain negative potential,and suitable for use as voltage reference
Definition FR: diode à  semiconducteur qui présente pour de faibles tensions inverses un phénomène de claquage par avalanche; diode optimisée, grâce au choix du taux de dopage, pour fonctionner dans la région de claquage inverse, à  une tension largement indépendante de l'intensité

Zener diode

EN: Zener diode, breakdown diode, avalanche diode
FR: diode Zener
Definition EN: a diode with the characteristic of showing sharp increase of reverse current at a certain negative potential,and suitable for use as voltage reference
Definition FR: diode à  semiconducteur qui présente pour de faibles tensions inverses un phénomène de claquage par avalanche; diode optimisée, grâce au choix du taux de dopage, pour fonctionner dans la région de claquage inverse, à  une tension largement indépendante de l'intensité

Zener diode

EN: Zener diode
FR: diode Zener
Definition EN: a diode with the characteristic of showing sharp increase of reverse current at a certain negative potential,and suitable for use as voltage reference
Definition FR: diode à  semiconducteur qui présente pour de faibles tensions inverses un phénomène de claquage par avalanche; diode optimisée, grâce au choix du taux de dopage, pour fonctionner dans la région de claquage inverse, à  une tension largement indépendante de l'intensité

Zener effect

EN: Zener effect
FR: effet Zener
Definition EN: phenomenon in which,under the influence of an electric field,an electron crosses the energy-band gap from valence band to conduction band by tunnelling to a region in which the final energy is the same as the initial energy,resulting in the direct disruption of the valence bond

Zener emission

EN: Zener emission
FR: émission de Zener
Definition EN: emission of electrons across a thin(approx.5 micrometers)layer of dielectric from a semiconductor material to another semiconductor or to a conductor

Zener knee

EN: Zener knee, Zener voltage, Zener knee voltage
FR: tension de Zener
Definition EN: onset voltage of the Zener effect at which the p-n junction characteristic enters the breakdown region; the potential required to initiate breakdown, defined as the potential at a particular value of the reverse current such as 1A
Definition FR: lorsque la tension appliquée dans le sens inverse dépasse une certaine valeur, le courant inverse augmente brusquement en valeur absolue. La tension de Zener dépend très peu de la température

Zener knee voltage

EN: Zener knee voltage, Zener knee, Zener voltage
FR: tension de Zener
Definition EN: onset voltage of the Zener effect at which the p-n junction characteristic enters the breakdown region; the potential required to initiate breakdown, defined as the potential at a particular value of the reverse current such as 1A
Definition FR: lorsque la tension appliquée dans le sens inverse dépasse une certaine valeur, le courant inverse augmente brusquement en valeur absolue. La tension de Zener dépend très peu de la température

Zener level detector

EN: Zener level detector
FR: détecteur de niveau à  diode de Zener
Definition EN: level detector in which temperature drift is reduced by use of a Zener diode to compensate a transistor; e.g. ,Zener diode in series with emitter-follower load, AGC output across load being such as to make the oscillator under control have an amplitude controlled by the Zener diode voltage

Zener noise

EN: Zener noise
FR: bruit de Zener
Definition EN: random electrical noise caused when electrons cross from one side of a junction to the other as a result of the Zener effect,each such electron causing an impulse of area /q/ in the current-vs-time relationship

Zener resistance

EN: Zener resistance, Zener slope
FR: pente de la caractéristique de Zener
Definition EN: rate of increase of current with potential in the Zener breakdown region of a p-n junction characteristic,defined at a particular current value

Zener slope

EN: Zener slope, Zener resistance
FR: pente de la caractéristique de Zener
Definition EN: rate of increase of current with potential in the Zener breakdown region of a p-n junction characteristic,defined at a particular current value

Zener slope

EN: Zener slope
FR: pente de la caractéristique de Zener
Definition EN: rate of increase of current with potential in the Zener breakdown region of a p-n junction characteristic,defined at a particular current value

Zener theory

EN: Zener theory
FR: théorie de Zener
Definition EN: identification of two processes:a)the tunnelling of electrons through a potential barrier with finite dimensions in a semiconductor piece,and b),electrons crossing the band gap from the valence band to the conduction band,the identification introducing a duality of space and energy

Zener voltage

EN: Zener voltage, Zener knee, Zener knee voltage
FR: tension de Zener
Definition EN: onset voltage of the Zener effect at which the p-n junction characteristic enters the breakdown region; the potential required to initiate breakdown, defined as the potential at a particular value of the reverse current such as 1A
Definition FR: lorsque la tension appliquée dans le sens inverse dépasse une certaine valeur, le courant inverse augmente brusquement en valeur absolue. La tension de Zener dépend très peu de la température

Zener voltage

EN: Zener voltage
FR: tension de Zener
Definition EN: onset voltage of the Zener effect at which the p-n junction characteristic enters the breakdown region; the potential required to initiate breakdown, defined as the potential at a particular value of the reverse current such as 1A
Definition FR: lorsque la tension appliquée dans le sens inverse dépasse une certaine valeur, le courant inverse augmente brusquement en valeur absolue. La tension de Zener dépend très peu de la température

Zener-diode combination

EN: Zener-diode combination, temperature-compensated combination
FR: combinaison compensée en température
Definition EN: package consisting of two or more Zener diodes connected in series(with the possible inclusion of forward-biased diodes for fine adjustment)that has a composite operating voltage almost independent of temperature,often used as a highly-stable reference voltage

zenith angle

EN: zenith angle, zenith distance
FR: distance zénithale
Definition EN: the angle between the beam from the sun and the vertical

zenith angle

EN: zenith angle
FR: distance zénithale
Definition EN: the angle between the beam from the sun and the vertical

zero crossing-Period

EN: zero crossing-Period
FR: période des passages à  zéro, période moyenne au niveau zéro
Definition EN: the duration of the wave record divided by the number of times the record trace crosses the mean water level in an upward direction during the record

zero error

EN: zero error
FR: déviation résiduelle
Definition EN: the delay time occurring within the transmitter and receiver circuits of a radar system

zero level

EN: zero level
FR: niveau zéro
Definition EN: in telecommunications systems,1 mW of power,normally across a load of 600 ohms

zero pinch-off voltage

EN: zero pinch-off voltage
FR: tension de pincement nulle
Definition EN: gate voltage of zero at the pinch-off condition of a particular MOST; infers that the device has zero effective doping level at the surface and, strictly, is neither a depletion nor an enhancement device

zero point

EN: zero point
FR: zéro, point zéro
Definition EN: operating point of an active device or system that is identical with that specified, expected, or required; i.e. ,the drift from the point is zero

zero point

EN: zero point
FR: point zéro
Definition EN: the electrical zero point where zero millivolts would be displayed

zero potential

EN: zero potential, neutral
FR: potentiel de référence, potentiel zéro
Definition EN: potential of a point at infinite distance,used for defining capacitance
Definition FR: potentiel d'un point situé à  une distance infinie, utilisé pour définir la capacité

zero suppression

EN: zero suppression
FR: décalage du zéro
Definition EN: the span of an indicator or chart recorder may be offset from zero(zero suppressed)such that neither limit of the span will be zero

zero-bias drain current

EN: zero-bias drain current
FR: courant de drain à  polarisation nulle
Definition EN: drain current of field-effect transistor, flowing in the absence of gate bias; function of both channel resistivity and pinch-off voltage

Zeta potential

EN: Zeta potential
FR: potentiel-zéta
Definition EN: the potential across the diffuse layer of ions surrounding a charged dispersed particle

zeta potential

EN: zeta potential
FR: potentiel électrocinétique
EN: electrokinetic potential
FR: potentiel interfacial
Definition EN: the difference in potential between the immovable liquid layer attached to the surface of a solid phase and the movable part of the diffuse layer in the body of the liquid
Definition FR: la différence de potentiel entre la couche liquide immuable fixée sur la surface d'une phase solide et la partie mobile de la couche diffuse dans le corps du liquide

Ziegler method

EN: Ziegler method, majority carrier correction method, MCC method
FR: méthode de mesure des porteurs majoritaires
Definition EN: a method for measuring doping profiles that corrects for the onset of accumulation at shallow depths

zig-zag connection

EN: zig-zag connection
FR: connexion zig-zag
Definition EN: the connection in star of polyphase windings, each branch of which is made up of windings that generate phase-displaced voltage.
Definition FR: connexion en étoile des enroulements polyphasés dont chaque branche est composée par des enroulements qui sont le siège de tensions de phases différentes.

zigzag connection

EN: zigzag connection
FR: connexion en zigzag
Definition EN: a winding connection in which one end of each phase winding of a polyphase transformer,or reactor,is connected to a common point,i.e.neutral point,and each phase winding consists of two parts in which phase-displaced voltages are induced.These two parts normally have the same number of turns
Definition FR: connexion des enroulements telle qu'une extrémité de chaque enroulement de phase d'un transformateur(bobine d'inductance)polyphasé est reliée à  un point commun(point neutre)et/ou chaque enroulement de phase comporte deux parties dans lesquelles sont induites des tensions déphasées;ces deux parties ont normalement le même nombre de spires

zinc-blende structure

EN: zinc-blende structure
FR: structure zinc-blende
Definition EN: structure of a compound, as of a compound semiconductor, that has certain similarities with diamondlike structure, named from ZnS that has this structure; the component atoms have dissimilar size, but are arranged as are carbon atoms in a diamond (and germanium atoms in a single crystal)

zone levelling

EN: zone levelling
FR: nivellement de zone, nivellement par zone
Definition EN: the passing of one or more molten zones through a semiconductor crystal for the purpose of uniformly distributing impurities in the crystal
Definition FR: passage d'une ou de plusieurs zones fondues a travers un cristal semi-conducteur, afin d'uniformiser la concentration en impuretes dans le cristal

zone pass

EN: zone pass
FR: passage de zone
Definition EN: passage of a molten zone from one end of a long ingot to the other,in a zone-refining operation,the termination of the zone pass being before the ingot tip in some cases because of technical difficulties

zoom in

EN: zoom in, forward zoom
FR: zooming avant, zoom avant
Definition EN: to move a camera in quickly for a close-up without changing shots


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