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TAUX HARMONIQUES [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-05-16

English

Subject field(s)
  • Telecommunications Transmission
  • Oscillators and Oscillating Circuits (Electronics)
  • Electrical Circuits and Circuit Breakers
DEF

A relaxation oscillator with two valves (or equivalent networks) so coupled that the input of each is derived from the output of the other.

French

Domaine(s)
  • Transmission (Télécommunications)
  • Circuits oscillants et oscillateurs (Électronique)
  • Circuits électriques et coupe-circuits
DEF

Oscillateur à relaxation, constitué par deux tubes électroniques couplés de sorte que la sortie de chacun d’eux soit reliée à l'entrée de l'autre, oscillant autour d’un état d’équilibre instable et produisant un courant à taux d’harmoniques élevé.

Spanish

Campo(s) temático(s)
  • Transmisión (Telecomunicaciones)
  • Osciladores y circuitos oscilantes (Electrónica)
  • Circuitos eléctricos e interruptores automáticos
DEF

Tipo de oscilador utilizado para generar formas de ondas no sinusoidales, en el que la salida de cada dispositivo activo está retroacoplado a la entrada del otro para mantener las oscilaciones.

Save record 1

Record 2 1981-01-07

English

Subject field(s)
  • Radioelectricity
  • Audio Technology
CONT

The [DFM] meter indicates the distortion factor, which is the ratio of the rms total distortion to the amplitude of the fundamental frequency, including harmonics.

OBS

A common measurement is total harmonic distortion (thd) where the fundamental of a very low distortion sine-wave test signal is removed by a steep notch filter. The summed harmonics that remain are then measured as a voltage of the fundamental at the required test power of the amplifier. (When measured in this manner the term thd is not really correct since the distortion also has the amplifier noise added to it within the test passband. The correct term is distortion factor). (GRAEL, 1977, p. 326).

French

Domaine(s)
  • Radioélectricité
  • Électroacoustique
CONT

[Dans le Teac AS M50] les taux de distorsion restent très faibles quelle que soit la puissance, et(...) la décroissance des amplitudes dans l'analyse du spectre de distorsion par harmoniques est régulière.

Spanish

Save record 2

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