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FREQUENCY DISCRIMINATOR [4 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2014-01-09

English

Subject field(s)
  • Radio Transmission and Reception
  • Telecommunications Facilities
CONT

Demodulation of [a] signal requires a system that produces an output proportional to the instantaneous frequency deviation of the input signal. Such a system is called a frequency discriminator.

French

Domaine(s)
  • Émission et réception radio
  • Installations de télécommunications

Spanish

Campo(s) temático(s)
  • Radiotransmisión y radiorrecepción
  • Instalaciones de telecomunicaciones
Save record 1

Record 2 1994-01-29

English

Subject field(s)
  • Corporate Security
  • Electrical Engineering
  • Security Devices
CONT

Three techniques used for reducing nuisance alarms from natural or man-made seismic energy are discriminator sensors, dual channel signal processing, and bandpass frequency selection.

French

Domaine(s)
  • Sécurité générale de l'entreprise
  • Électrotechnique
  • Dispositifs de sécurité
OBS

discriminateur : montage fournissant un signal dont la polarité et l'amplitude dépendent respectivement du signe et de la valeur de la différence entre le signal appliqué à son entrée et une valeur ou un signal de référence.

Spanish

Save record 2

Record 3 1994-01-29

English

Subject field(s)
  • Electrical Systems
  • Corporate Security
  • Security Devices
OBS

discriminator : device used to convert input frequency changes to proportional output voltages.

French

Domaine(s)
  • Ensembles électrotechniques
  • Sécurité générale de l'entreprise
  • Dispositifs de sécurité
OBS

discriminateur : montage fournissant un signal dont la polarité et l'amplitude dépendent respectivement du signe et de la valeur de la différence entre le signal appliqué à son entrée et une valeur ou un signal de référence.

Spanish

Save record 3

Record 4 1991-12-02

English

Subject field(s)
  • Television (Radioelectricity)
DEF

A type of frequency discriminator that converts a frequency-modulated signal into an audio signal. It requires a limiter to prevent random amplitude variations of the FM signal from appearing in its output.

CONT

An improved demodulator, known as a phase-shift or Foster-Seely discriminator... is sensitive to amplitude variations, or modulation, as well as to frequency modulation.... Therefore, a limiter should always precede the discriminator. The limiter removes amplitude variations from the FM signal.

French

Domaine(s)
  • Télévision (Radioélectricité)
CONT

Discriminateur de Foster-Seeley [...] Ce discriminateur comporte notamment deux circuits [...] accordés sur la fréquence [...] de la porteuse et couplés par mutuelle induction (couplage lâche). En parallèle avec le second circuit est placé un ensemble formé de deux circuits de redressement; il permet d'obtenir un signal de basse fréquence à partir de la tension engendrée entre les points P et Q.

Spanish

Save record 4

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