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101 двухчастотный гетеродин
Русско-английский словарь по электронике > двухчастотный гетеродин
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102 стабилизированный гетеродин
Русско-английский словарь по электронике > стабилизированный гетеродин
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103 двухчастотный гетеродин
Русско-английский словарь по радиоэлектронике > двухчастотный гетеродин
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104 стабилизированный гетеродин
Русско-английский словарь по радиоэлектронике > стабилизированный гетеродин
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105 разница
* * *ра́зница ж.
differenceра́зница ме́жду, напр. часто́тами исто́чника и гетероди́на — difference in frequency between the source and the local oscillator -
106 Überlagerungsoszillatorröhre
Überlagerungsoszillatorröhre f local-oscillator tubeDeutsch-Englisch Wörterbuch der Elektrotechnik und Elektronik > Überlagerungsoszillatorröhre
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107 paikallisoskillaattoritaajuus
physics• local oscillator frequency -
108 częstotliwość oscylatora lokalnego
• frequency time base• local oscillator frequencySłownik polsko-angielski dla inżynierów > częstotliwość oscylatora lokalnego
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109 generator lokalny stabilizowany
• stable local oscillatorSłownik polsko-angielski dla inżynierów > generator lokalny stabilizowany
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110 когерентный гетеродин
coho, coherent local oscillatorРусско-английский политехнический словарь > когерентный гетеродин
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111 стабилизированный гетеродин
stabilized [stable] local oscillatorРусско-английский политехнический словарь > стабилизированный гетеродин
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112 напряжение
1. с. мех. stress2. с. эл. voltage, tensionстабилизировать напряжение — stabilize a voltage; regulate a voltage
напряжение анода — anode voltage; plate voltage; anode voltage
напряжение бортовой сети — airborne voltage; ships system voltage; авто car-system voltage
усиление по напряжению — voltage amplification; voltage gain
пусковое напряжение; отпирающее напряжение — trigger voltage
3. effortлегко, без напряжения — without effort
Синонимический ряд:усилие (сущ.) надсада; надсаду; натуга; натугу; усилие -
113 сигнал с высоким уровнем напряжения
Русско-английский большой базовый словарь > сигнал с высоким уровнем напряжения
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114 Armstrong, Edwin Howard
[br]b. 18 December 1890 New York City, New York, USAd. 31 January 1954 New York City, New York, USA[br]American engineer who invented the regenerative and superheterodyne amplifiers and frequency modulation, all major contributions to radio communication and broadcasting.[br]Interested from childhood in anything mechanical, as a teenager Armstrong constructed a variety of wireless equipment in the attic of his parents' home, including spark-gap transmitters and receivers with iron-filing "coherer" detectors capable of producing weak Morse-code signals. In 1912, while still a student of engineering at Columbia University, he applied positive, i.e. regenerative, feedback to a Lee De Forest triode amplifier to just below the point of oscillation and obtained a gain of some 1,000 times, giving a receiver sensitivity very much greater than hitherto possible. Furthermore, by allowing the circuit to go into full oscillation he found he could generate stable continuous-waves, making possible the first reliable CW radio transmitter. Sadly, his claim to priority with this invention, for which he filed US patents in 1913, the year he graduated from Columbia, led to many years of litigation with De Forest, to whom the US Supreme Court finally, but unjustly, awarded the patent in 1934. The engineering world clearly did not agree with this decision, for the Institution of Radio Engineers did not revoke its previous award of a gold medal and he subsequently received the highest US scientific award, the Franklin Medal, for this discovery.During the First World War, after some time as an instructor at Columbia University, he joined the US Signal Corps laboratories in Paris, where in 1918 he invented the superheterodyne, a major contribution to radio-receiver design and for which he filed a patent in 1920. The principle of this circuit, which underlies virtually all modern radio, TV and radar reception, is that by using a local oscillator to convert, or "heterodyne", a wanted signal to a lower, fixed, "intermediate" frequency it is possible to obtain high amplification and selectivity without the need to "track" the tuning of numerous variable circuits.Returning to Columbia after the war and eventually becoming Professor of Electrical Engineering, he made a fortune from the sale of his patent rights and used part of his wealth to fund his own research into further problems in radio communication, particularly that of receiver noise. In 1933 he filed four patents covering the use of wide-band frequency modulation (FM) to achieve low-noise, high-fidelity sound broadcasting, but unable to interest RCA he eventually built a complete broadcast transmitter at his own expense in 1939 to prove the advantages of his system. Unfortunately, there followed another long battle to protect and exploit his patents, and exhausted and virtually ruined he took his own life in 1954, just as the use of FM became an established technique.[br]Principal Honours and DistinctionsInstitution of Radio Engineers Medal of Honour 1917. Franklin Medal 1937. IERE Edison Medal 1942. American Medal for Merit 1947.Bibliography1922, "Some recent developments in regenerative circuits", Proceedings of the Institute of Radio Engineers 10:244.1924, "The superheterodyne. Its origin, developments and some recent improvements", Proceedings of the Institute of Radio Engineers 12:549.1936, "A method of reducing disturbances in radio signalling by a system of frequency modulation", Proceedings of the Institute of Radio Engineers 24:689.Further ReadingL.Lessing, 1956, Man of High-Fidelity: Edwin Howard Armstrong, pbk 1969 (the only definitive biography).W.R.Maclaurin and R.J.Harman, 1949, Invention \& Innovation in the Radio Industry.J.R.Whitehead, 1950, Super-regenerative Receivers.A.N.Goldsmith, 1948, Frequency Modulation (for the background to the development of frequency modulation, in the form of a large collection of papers and an extensive bibliog raphy).KFBiographical history of technology > Armstrong, Edwin Howard
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115 Oszillator für den Überlagerungsempfang
m DÜ local oscillatorDeutsch-Englisch Wörterbuch für Informatik > Oszillator für den Überlagerungsempfang
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116 гетеродин
Русско-английский глоссарий по космической технике > гетеродин
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117 введение местной поднесущей
Русско-английский словарь по информационным технологиям > введение местной поднесущей
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118 местный опорный гетеродин
Astronautics: local reference oscillatorУниверсальный русско-английский словарь > местный опорный гетеродин
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119 испытательный
1. probationary2. checking3. testing4. test5. trialслужащий, проходящий испытательный срок — trial employee
6. probationСинонимический ряд:проверочный (прил.) пробный; проверочный
См. также в других словарях:
Local oscillator — A local oscillator is an electronic device used to generate a signal normally for the purpose of converting a signal of interest to a different frequency using a mixer. This process of frequency conversion, also referred to as heterodyning,… … Wikipedia
local oscillator — vietinis generatorius statusas T sritis automatika atitikmenys: angl. local oscillator vok. Überlagerer, m; Überlagerungsoscillator, m rus. местный генератор, m pranc. oscillateur local, m … Automatikos terminų žodynas
local oscillator — noun an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones • Syn: ↑heterodyne oscillator • Hypernyms: ↑oscillator • Part Holonyms: ↑heterodyne receiver, ↑superheterodyne receiver, ↑ … Useful english dictionary
local oscillator — /loʊkəl ˈɒsəleɪtə/ (say lohkuhl osuhlaytuh) noun an oscillator in a receiver, whose output is mixed with a signal borne by a carrier wave in order to change to a new carrier frequency …
oscillator — noun generator that produces sonic oscillations or alternating current (Freq. 1) • Hypernyms: ↑generator • Hyponyms: ↑crystal oscillator, ↑quartz oscillator, ↑local oscillator, ↑heterodyne oscillator … Useful english dictionary
Local Interconnect Network — The LIN Bus (Local Interconnect Network) is a computer networking bus system used within current automotive network architectures.The LIN specification is enforced by the LIN consortium, with the first exploited version being 1.1, released in… … Wikipedia
Parametric oscillator — A parametric oscillator is a simple harmonic oscillator whose parameters (its resonance frequency omega and damping eta) vary in time in a defined wayAnother intuitive way of understanding a parametric oscillator is as follows: a parametric… … Wikipedia
Blocking oscillator — A blocking oscillator is the minimal configuration of discrete electronic components which can produce a free running signal, requiring only a capacitor, transformer, and one amplifying component. The name is derived from the fact that the… … Wikipedia
heterodyne oscillator — noun an oscillator whose output heterodynes with the incoming radio signal to produce sum and difference tones • Syn: ↑local oscillator • Hypernyms: ↑oscillator • Part Holonyms: ↑heterodyne receiver, ↑superheterodyne receiver, ↑sup … Useful english dictionary
oscillateur local — vietinis generatorius statusas T sritis automatika atitikmenys: angl. local oscillator vok. Überlagerer, m; Überlagerungsoscillator, m rus. местный генератор, m pranc. oscillateur local, m … Automatikos terminų žodynas
Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal … Wikipedia