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MODULATED VOLTAGE [7 records]

Record 1 2022-03-10

English

Subject field(s)
  • Electronic Devices
  • Semiconductors (Electronics)
  • Electromagnetism
CONT

A magnetoresistance device is proposed in [both a] magnetically and electrically modulated two-dimensional electron gas, which can be realized experimentally by the deposition, on the top and bottom of a semiconductor heterostructure, of two parallel metallic ferromagnetic strips under an applied voltage. It is shown that a considerable magnetoresistance effect can be achieved in such a device due to the significant transmission difference for electrons through parallel and antiparallel magnetization configurations.

Key term(s)
  • magneto-resistance device

French

Domaine(s)
  • Dispositifs électroniques
  • Semi-conducteurs (Électronique)
  • Électromagnétisme
Key term(s)
  • dispositif à magnéto-résistance

Spanish

Save record 1

Record 2 2004-09-17

English

Subject field(s)
  • Water Pollution
  • Surface Treatment of Metals
CONT

The Keronite coating process resembles anodising in that it uses an electric power supply and an electrolyte bath. However, it is significantly different from anodising in that it produces much harder, thicker layers while using environmentally less harmful alkali electrolytes and a specially modulated AC voltage. Keronite coating involves creating a plasma discharge around a component immersed in an electrolyte that provides surface oxidation as well as the potential for elemental co-deposition.

OBS

Keronite is a trade mark of the society Keronite ltd.

French

Domaine(s)
  • Pollution de l'eau
  • Traitements de surface des métaux
CONT

Le procédé Keronite, appelé oxydation électrolytique à décharge de plasma, produit un revêtement céramique extrêmement dur qui protège de la corrosion les métaux tels que l'aluminium, le magnésium et le titane.

OBS

Keronite est une marque déposée de la société Keronite ltd.

Spanish

Save record 2

Record 3 2002-12-09

English

Subject field(s)
  • Radio Transmission and Reception
  • Telecommunications Transmission
DEF

A method of amplitude modulation in which the modulating valve and modulated amplifier valve are in series across the anode voltage supply.

French

Domaine(s)
  • Émission et réception radio
  • Transmission (Télécommunications)
DEF

Modulation d'amplitude par l'anode dans laquelle les tubes modulateur et modulé sont alimentés en série par la même source anodique, la somme des tensions anodiques des deux tubes restant constante.

Spanish

Campo(s) temático(s)
  • Radiotransmisión y radiorrecepción
  • Transmisión (Telecomunicaciones)
DEF

Método de modulación de amplitud en el que la válvula moduladora y la válvula amplificadora modulada están alimentadas en serie mediante la misma fuente anódica, permanenciendo la suma de las tensiones anódicas constante.

Save record 3

Record 4 2002-04-17

English

Subject field(s)
  • General Mechanics (Physics)
  • Navigation Instruments
CONT

Roll Erection. During the first phase of vertical alignment, the platform roll gimbal is case aligned and erects to the error signal from roll CX... The roll error signal is applied to [an] amplifier. After amplification, it is demodulated..., properly phased and limited by network... and then combined with a feedback voltage from [the] roll tachometer..., which provides damping action. The resultant signal is modulated, amplified and fed to the platform roll gimbal power amplifiers...

French

Domaine(s)
  • Mécanique générale (Physique)
  • Instruments de navigation
CONT

Érection du cardan de roulis. Durant la première phase de l'alignement sur la verticale, le cardan de roulis de la plate-forme est mis en érection sur le signal d'erreur venant du CX de roulis [...]. Le signal d'erreur de roulis est envoyé à [un] amplificateur [...]; après amplification, ce signal est démodulé [...], mis en phase correctement et limité par le réseau [...]. Il est ensuite composé avec une tension de réaction venant du tachymètre de roulis [...] qui fournit l'action d'amortissement. Le signal qui en résulte est modulé, amplifié et envoyé aux amplificateurs de puissance du cardan de roulis de la plate-forme [...]

Spanish

Save record 4

Record 5 1991-04-05

English

Subject field(s)
  • Television (Radioelectricity)
CONT

... in the case of a TV signal, the modulated aural carrier level, measured in terms of RMS voltage and expressed in dBmV.

French

Domaine(s)
  • Télévision (Radioélectricité)

Spanish

Save record 5

Record 6 1991-04-05

English

Subject field(s)
  • Television (Radioelectricity)
OBS

the modulated visual carrier level, measured in terms of RMS voltage during synchronizing pulse and expressed in dBmV.

French

Domaine(s)
  • Télévision (Radioélectricité)

Spanish

Save record 6

Record 7 1983-06-07

English

Subject field(s)
  • Semiconductors (Electronics)
DEF

(In a field-effect transistor) The region connecting source and drain, the conductivity of which is modulated by the gate voltage.

French

Domaine(s)
  • Semi-conducteurs (Électronique)
DEF

[Dans un transistor à effet de champ,] zone de semiconducteur dopé dans lequel passeront les charges entre les électrodes appelées respectivement source et drain.

Spanish

Save record 7

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