superheterodyne reception

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• superheterodyne reception — ▪ electronics       the commonest technique for recovering the information (sound or picture) from carrier waves of a range of frequencies, transmitted by different broadcasting stations. The circuitry, devised by Edwin H. Armstrong (Armstrong,… …   Universalium

• superheterodyne — [so͞o΄pər het′ər ə dīn΄] adj. [ SUPER(SONIC) + HETERODYNE] designating or of a form of radio reception in which part of the amplification prior to demodulation is carried out at an intermediate supersonic frequency produced by beating the… …   English World dictionary

• Superheterodyne receiver — A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… …   Wikipedia

• Réception des ondes radioélectriques — Les techniques de réception des ondes radioélectriques permettent de restituer les informations analogiques ou numériques portées par une onde radioélectrique : divers schémas de récepteurs, de filtrage, de démodulation sont utilisés, en… …   Wikipédia en Français

• superheterodyne — adj. & n. adj. denoting or characteristic of a system of radio reception in which a local variable oscillator is tuned to beat at a constant ultrasonic frequency with carrier wave frequencies, making it unnecessary to vary the amplifier tuning… …   Useful english dictionary

• superheterodyne — [ˌsu:pə hɛt(ə)rə(ʊ)dʌɪn] adjective denoting or using a system of radio and television reception in which the receiver produces a tunable signal which is combined with the incoming signal to produce a predetermined intermediate frequency, on which …   English new terms dictionary

• superheterodyne —   a. Radio, applied to reception in which oscillations of slightly different frequency are imposed on the received oscillations, producing beats of a frequency above audio frequency which are easily amplified …   Dictionary of difficult words

• Récepteur superhétérodyne — à cinq tubes de fabrication japonaise (1955). En électronique, un récepteur hétérodyne est un récepteur conçu sur le principe du mélange de fréquences, ou hétérodynage, pour convertir le signal reçu en une fréquence intermédiaire plus basse qu il …   Wikipédia en Français

• radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …   Universalium

• Armstrong, Edwin H. — ▪ American inventor Introduction in full  Edwin Howard Armstrong   born Dec. 18, 1890, New York, N.Y., U.S. died Jan. 31/, Feb. 1, 1954, New York City  American inventor who laid the foundation for much of modern radio and electronic… …   Universalium

• radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …   Universalium