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1 Hertzian oscillator
вибратор [диполь] Герца, элементарный излучательБольшой англо-русский и русско-английский словарь > Hertzian oscillator
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2 Hertzian oscillator
вибратор [диполь\] Герца, элементарный излучательАнгло-русский словарь технических терминов > Hertzian oscillator
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3 Hertzian oscillator
1) Техника: вибратор Герца, диполь Герца, элементарный излучатель2) Телекоммуникации: генератор дипольного типа -
4 Hertzian oscillator
< phys> ■ Hertz'scher Oszillator m ; hertzscher Oszillator m ; Hertz'scher Dipol m ; hertzscher Dipol m -
5 Hertzian oscillator
osilator Hertz -
6 Hertzian oscillator
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7 hertzian oscillator
hertz osilatöru -
8 Hertzian oscillator
диполь Герца, элементарный излучательEnglish-Russian electronics dictionary > Hertzian oscillator
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9 Hertzian oscillator
диполь Герца, элементарный излучательThe New English-Russian Dictionary of Radio-electronics > Hertzian oscillator
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10 Hertzian oscillator
генератор дипольного типа; элементарный излучательEnglish-Russian dictionary of telecommunications and their abbreviations > Hertzian oscillator
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11 hertzian oscillator
————————English-Russian dictionary of electronics > hertzian oscillator
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12 hertzian oscillator
hertz osilatöru -
13 oscillator
1) генератор2) гетеродин3) вибратор, элементарный излучатель4) осциллятор•-
active oscillator
-
amplitude-modulated oscillator
-
audio-frequency oscillator
- backward wave oscillator -
balanced oscillator
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Barkhausen-Kurz oscillator
-
battery-driven oscillator
-
beat-frequency oscillator
-
beating oscillator
-
bias oscillator
-
blocking oscillator
-
bridge oscillator
-
bulk-wave oscillator
-
burst-controlled oscillator
-
calibration oscillator
-
capacitance-resistance oscillator
-
carrier frequency oscillator
-
cavity oscillator
-
cesium-beam atomic oscillator
-
chopping oscillator
-
Clapp oscillator
-
clock oscillator
-
coherent local oscillator
-
coherent oscillator
-
color subcarrier oscillator
-
continuous-wave oscillator
-
crystal-controlled oscillator
-
dielectric resonator oscillator
-
digitally-controlled oscillator
-
digital-controlled oscillator
-
digitally-control oscillator
-
digital-control oscillator
-
double-transit oscillator
-
Dow oscillator
-
drive oscillator
-
dynatron oscillator
-
eccentric weight oscillator
-
electric-tuned oscillator
-
electronically tunable oscillator
-
erase oscillator
-
extended-interaction oscillator
-
fast cyclotrone oscillator
-
fast oscillator
-
feedback oscillator
-
fixed-frequency oscillator
-
fork oscillator
-
free-running oscillator
-
frequency modulated oscillator
-
frequency-sensitive oscillator
-
frequency-swept oscillator
-
gated oscillator
-
Gunn oscillator
-
Gunn-diode oscillator
-
Gunn-effect oscillator
-
harmonic oscillator
-
Hartley oscillator
-
Hertzian oscillator
-
heterodyne oscillator
-
high-frequency oscillator
-
horizontal oscillator
-
hydraulic oscillator
-
impulse oscillator
-
inductance-capacitance oscillator
-
injection-driven oscillator
-
injection-locked oscillator
-
klystron oscillator
-
laser oscillator
-
LC oscillator
-
linear oscillator
-
local oscillator
-
locked-in oscillator
-
locked oscillator
-
low-frequency oscillator
-
low-noise oscillator
-
magnetostrictive oscillator
-
magnetron oscillator
-
marker oscillator
-
maser oscillator
-
master oscillator
-
Miller oscillator
-
mode-locked oscillator
-
modulated oscillator
-
molecular oscillator
-
motor-driven oscillator
-
motor-tuned oscillator
-
multifrequency oscillator
-
multivibrator oscillator
-
nuclear reactor oscillator
-
number-controlled oscillator
-
offset oscillator
-
oven-controlled crystal oscillator
-
parametric oscillator
-
permeability-tuned oscillator
-
phase-locked oscillator
-
phase-stabilized oscillator
-
piezoelectric oscillator
-
pilot oscillator
-
pulsed oscillator
-
pulse oscillator
-
quartz-crystal-controlled oscillator
-
quartz-crystal oscillator
-
radio-frequency oscillator
-
ramp oscillator
-
range-marker oscillator
-
RC-oscillator
-
reference oscillator
-
reflection oscillator
-
relaxation oscillator
-
repeller-type oscillator
-
RF-oscillator
-
ring oscillator
-
rugged oscillator
-
sawtooth oscillator
-
self-excited oscillator
-
service oscillator
-
simple oscillator
-
sinewave oscillator
-
single-shot blocking oscillator
-
single-wave oscillator
-
spot oscillator
-
square-wave oscillator
-
stabilized local oscillator
-
subcarrier oscillator
-
sweep oscillator
-
synchronized oscillator
-
temperature-compensated crystal oscillator
-
test oscillator
-
tracking oscillator
-
transitron oscillator
-
triggered oscillator
-
tube oscillator
-
tunable oscillator
-
ultrastable oscillator
-
variable crystal oscillator
-
variable-frequency oscillator
-
voltage-controlled oscillator
-
voltage-tuned oscillator
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Xtal oscillator -
14 oscillator
1) генератор3) гетеродин4) фтт осциллятор5) вибратор, элементарный излучатель•- a-f oscillator
- anharmonic oscillator
- antistiction oscillator
- arc oscillator
- arc-tube relaxation oscillator
- Armstrong oscillator - audio-frequency oscillator
- autodyne oscillator
- avalanche oscillator
- avalanche-diode oscillator - Barkhausen oscillator
- Barkhausen-Kurz oscillator
- beam-plasma wave oscillator
- beat oscillator - bias oscillator
- bipolar transistor oscillator
- blocking oscillator
- bridge piezoelectric oscillator
- bulk negative resistance oscillator
- Butler oscillator
- capacitance-resistance oscillator
- carrier insertion oscillator
- cathode-follower oscillator
- cavity oscillator
- chroma oscillator
- chrominance-subcarrier oscillator
- Clapp oscillator
- code-practice oscillator - color subcarrier oscillator
- Colpitts oscillator
- continuous-wave oscillator - cw oscillator
- degenerate parametric oscillator
- degenerate-type parametric oscillator - digital-control oscillator
- digital delay oscillator
- double-local oscillator
- double-transit oscillator
- Dow oscillator
- driven blocking oscillator
- driving oscillator
- Duffing oscillator
- dynatron oscillator - electron-tube oscillator
- erase oscillator
- extended-interaction oscillator
- Fabry-Perot maser oscillator
- fast cyclotron-wave oscillator
- feedback oscillator
- fixed-frequency oscillator
- fork oscillator
- free-running oscillator - frequency-sensitive oscillator
- frequency-swept oscillator
- ganging oscillator
- garnet-tuned oscillator
- gas-tube relaxation oscillator
- grid-dip oscillator
- grid-pulsing oscillator
- Gunn oscillator
- Gunn-diode oscillator
- Gunn-effect oscillator
- harmonic oscillator
- harmonic-locked oscillator
- Hartley oscillator
- helitron oscillator
- Hertzian oscillator
- heterodyne oscillator - impact-avalanche transit-time diode oscillator
- IMPATT oscillator
- impulse oscillator
- induced-degeneration blocking oscillator
- inductance-capacitance oscillator
- injected-beam backward-wave oscillator
- injection-driven oscillator
- injection-locked oscillator
- integral-cavity reflex-klystron oscillator
- Josephson oscillator
- kallitron oscillator
- keep-alive oscillator - laser oscillator
- LC oscillator
- Lecher oscillator
- Lecher-wire oscillator
- lighthouse-tube oscillator
- limited space-charge accumulation oscillator
- linear oscillator
- linear time-base oscillator
- line stabilized oscillator
- local oscillator
- locked oscillator
- locked-in oscillator
- LSA oscillator
- magnetostriction oscillator
- magnetostrictive oscillator
- magnetron oscillator
- maser oscillator
- master oscillator
- Meacham bridge oscillator
- Meissner oscillator
- microwave oscillator
- Miller oscillator
- modulated oscillator
- molecular oscillator
- monotron oscillator
- M-type backward-wave oscillator
- multifrequency oscillator
- multivibrator oscillator
- negative-resistance oscillator
- negative-transconductance oscillator
- nonsinusoidal oscillator
- number-controlled oscillator - parametric phase-locked oscillator - phase-shift oscillator
- phase-stabilized oscillator
- Pierce oscillator
- piezoelectric oscillator
- pilot oscillator
- plasma oscillator
- positive-grid oscillator
- pulse oscillator - quartz-crystal oscillator
- quartz-crystal-controlled oscillator
- quartz-locked oscillator
- quench oscillator
- quenched-mode Gunn oscillator
- RC oscillator
- Read-diode oscillator
- reentrant oscillator
- reference oscillator
- reflection oscillator
- reflex-klystron oscillator
- regenerative oscillator
- relaxation oscillator
- repeller-type oscillator
- resistance-capacitance oscillator
- resonant-line oscillator
- retarding-field oscillator
- RF oscillator
- ring oscillator
- ringing oscillator
- rugged oscillator
- sawtooth oscillator
- self-excited oscillator
- self-mixing oscillator
- self-quenching oscillator
- series-tuned oscillator
- service oscillator
- shunt-tuned oscillator
- sine-wave oscillator
- single-mode oscillator
- single-shot blocking oscillator
- single-wave oscillator
- spark-gap oscillator
- spin oscillator
- square-wave oscillator
- squegging oscillator - sweep oscillator
- synchronized oscillator
- temperature compensated oscillator
- test oscillator
- tetrode oscillator
- timing-axis oscillator - transitron oscillator
- TRAPATT oscillator
- trapped plasma avalanche transit-time oscillator - tunable oscillator
- tuned-anode oscillator
- tuned-base oscillator
- tuned-collector oscillator
- tuned-grid oscillator
- tuned-input oscillator
- tuned-output oscillator
- tuned-plate oscillator
- ultra-audion oscillator - varactor-modulated crystal oscillator - Xtal oscillator
- YIG-tuned tunnel-diode oscillator -
15 oscillator
1) генератор3) гетеродин4) фтт. осциллятор5) вибратор, элементарный излучатель•- a-f oscillator
- anharmonic oscillator
- antistiction oscillator
- arc oscillator
- arc-tube relaxation oscillator
- Armstrong oscillator
- astable blocking oscillator
- audio oscillator
- audio-frequency oscillator
- autodyne oscillator
- avalanche oscillator
- avalanche-diode oscillator
- backward-wave oscillator
- balanced oscillator
- Barkhausen oscillator
- Barkhausen-Kurz oscillator
- beam-plasma wave oscillator
- beat oscillator
- beat-frequency oscillator
- beating oscillator
- bias oscillator
- bipolar transistor oscillator
- blocking oscillator
- bridge piezoelectric oscillator
- bulk negative resistance oscillator
- Butler oscillator
- capacitance-resistance oscillator
- carrier insertion oscillator
- cathode-follower oscillator
- cavity oscillator
- chroma oscillator
- chrominance-subcarrier oscillator
- Clapp oscillator
- code-practice oscillator
- coherent oscillator
- color oscillator
- color subcarrier oscillator
- Colpitts oscillator
- continuous-wave oscillator
- crystal oscillator
- crystal-controlled oscillator
- cw oscillator
- degenerate parametric oscillator
- degenerate-type parametric oscillator
- delayed pulse oscillator
- dielectric resonator oscillator
- digital delay oscillator
- digital-control oscillator
- double-local oscillator
- double-transit oscillator
- Dow oscillator
- driven blocking oscillator
- driving oscillator
- Duffing oscillator
- dynatron oscillator
- electron-coupled oscillator
- electronically tunable oscillator
- electron-tube oscillator
- erase oscillator
- extended-interaction oscillator
- Fabry-Perot maser oscillator
- fast cyclotron-wave oscillator
- feedback oscillator
- fixed-frequency oscillator
- fork oscillator
- free-running oscillator
- frequency multiplier oscillator
- frequency-pulling oscillator
- frequency-sensitive oscillator
- frequency-swept oscillator
- ganging oscillator
- garnet-tuned oscillator
- gas-tube relaxation oscillator
- grid-dip oscillator
- grid-pulsing oscillator
- Gunn oscillator
- Gunn-diode oscillator
- Gunn-effect oscillator
- harmonic oscillator
- harmonic-locked oscillator
- Hartley oscillator
- helitron oscillator
- Hertzian oscillator
- heterodyne oscillator
- high-frequency oscillator
- impact-avalanche transit-time diode oscillator
- impact-avalanche transit-time oscillator
- IMPATT oscillator
- impulse oscillator
- induced-degeneration blocking oscillator
- inductance-capacitance oscillator
- injected-beam backward-wave oscillator
- injection-driven oscillator
- injection-locked oscillator
- integral-cavity reflex-klystron oscillator
- Josephson oscillator
- kallitron oscillator
- keep-alive oscillator
- klystron oscillator
- labile oscillator
- laser oscillator
- LC oscillator
- Lecher oscillator
- Lecher-wire oscillator
- lighthouse-tube oscillator
- limited space-charge accumulation oscillator
- line stabilized oscillator
- linear oscillator
- linear time-base oscillator
- local oscillator
- locked oscillator
- locked-in oscillator
- LSA oscillator
- magnetostriction oscillator
- magnetostrictive oscillator
- magnetron oscillator
- maser oscillator
- master oscillator
- Meacham bridge oscillator
- Meissner oscillator
- microwave oscillator
- Miller oscillator
- modulated oscillator
- molecular oscillator
- monotron oscillator
- M-type backward-wave oscillator
- multifrequency oscillator
- multivibrator oscillator
- negative-resistance oscillator
- negative-transconductance oscillator
- nonsinusoidal oscillator
- number-controlled oscillator
- optical parametric oscillator
- O-type backward-wave oscillator
- oven-controlled crystal oscillator
- parametric oscillator
- parametric phase-locked oscillator
- phase-locked oscillator
- phase-locked subharmonic oscillator
- phase-shift oscillator
- phase-stabilized oscillator
- Pierce oscillator
- piezoelectric oscillator
- pilot oscillator
- plasma oscillator
- positive-grid oscillator
- pulse oscillator
- pulsed avalanche oscillator
- pulsed avalanche-diode oscillator
- push-pull oscillator
- quartz-crystal oscillator
- quartz-crystal-controlled oscillator
- quartz-locked oscillator
- quench oscillator
- quenched-mode Gunn oscillator
- RC oscillator
- Read-diode oscillator
- reentrant oscillator
- reference oscillator
- reflection oscillator
- reflex-klystron oscillator
- regenerative oscillator
- relaxation oscillator
- repeller-type oscillator
- resistance-capacitance oscillator
- resonant-line oscillator
- retarding-field oscillator
- RF oscillator
- ring oscillator
- ringing oscillator
- rugged oscillator
- sawtooth oscillator
- self-excited oscillator
- self-mixing oscillator
- self-quenching oscillator
- series-tuned oscillator
- service oscillator
- shunt-tuned oscillator
- sine-wave oscillator
- single-mode oscillator
- single-shot blocking oscillator
- single-wave oscillator
- spark-gap oscillator
- spin oscillator
- square-wave oscillator
- squegging oscillator
- stabilized local oscillator
- subcarrier oscillator
- superconducting-cavity stabilized oscillator
- surface-acoustic-wave oscillator
- sweep oscillator
- synchronized oscillator
- temperature compensated oscillator
- test oscillator
- tetrode oscillator
- timing-axis oscillator
- transferred-electron oscillator
- transistor oscillator
- transitron oscillator
- TRAPATT oscillator
- trapped plasma avalanche transit-time oscillator
- traveling-wave oscillator
- tri-tet oscillator
- tunable oscillator
- tuned-anode oscillator
- tuned-base oscillator
- tuned-collector oscillator
- tuned-grid oscillator
- tuned-input oscillator
- tuned-output oscillator
- tuned-plate oscillator
- ultra-audion oscillator
- unijunction transistor oscillator
- unlocked driven oscillators
- vacuum-tube oscillator
- Van der Pol oscillator
- varactor-modulated crystal oscillator
- variable reactance oscillator
- variable-frequency oscillator
- velocity-modulated oscillator
- voltage-controlled crystal oscillator
- voltage-controlled oscillator
- Wien-bridge oscillator
- Xtal oscillator
- YIG-tuned tunnel-diode oscillatorThe New English-Russian Dictionary of Radio-electronics > oscillator
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16 oscillator
1) генератор2) гетеродин3) вибратор•- alignment oscillator
- audio-frequency oscillator
- backward-wave oscillator
- beat oscillator
- beat-frequency oscillator
- bias oscillator
- blanking oscillator
- blocking oscillator
- bridge oscillator
- Butler oscillator
- calibration oscillator
- capacitance-resistance oscillator
- cavity oscillator
- chroma oscillator
- chrominance-carrier oscillator
- chrominance-subcarrier oscillator
- Clapp oscillator
- clock oscillator
- closed oscillator
- code-practice oscillator
- coilless oscillator
- color oscillator
- color-subcarrier oscillator
- Colpitz oscillator
- cross-field backward wave oscillator
- crystal oscillator
- crystal-controlled oscillator
- delayed pulse oscillator
- double local oscillator
- driving oscillator
- dynatron oscillator
- erase oscillator
- feedback oscillator
- ferrite-tuned oscillator
- fixed-frequency oscillator
- fork oscillator
- glow-tube oscillator
- grid-dip oscillator
- Gunn oscillator
- harmonic oscillator
- Hartley oscillator
- Hertzian oscillator
- heterodyne oscillator
- hollow-space oscillator
- horizontal oscillator
- horizontal-deflection oscillator
- impulse oscillator
- inductance-capacitance oscillator
- klystron oscillator
- labile oscillator
- laser oscillator
- line-stabilized oscillator
- local oscillator
- locked oscillator
- locked-in oscillator
- low-frequency oscillator
- magnetostrictive oscillator
- magnetron oscillator
- master oscillator
- microwave oscillator
- Miller oscillator
- modulated oscillator
- M-type backward wave oscillator
- multifrequency oscillator
- negative-resistance oscillator
- nonlinear oscillator
- octave-band oscillator
- optical-parametric oscillator
- O-type backward wave oscillator
- parametric oscillator
- phase shift oscillator
- phase-locked oscillator
- phase-locked subharmonic oscillator
- Pierce oscillator
- piezoelectric oscillator
- Planck oscillator
- positive grid oscillator
- pulse oscillator
- pulsed oscillator
- pump oscillator
- push-pull oscillator
- quartz-crystal oscillator
- quench oscillator
- radiation oscillator
- radio-frequency oscillator
- RC-oscillator
- relaxating oscillator
- relaxation oscillator
- retarding-field oscillator
- Royer oscillator
- rubidium oscillator
- self-excited oscillator
- self-quenching oscillator
- self-sustained oscillator
- sine-wave oscillator
- single-mode oscillator
- single-wave oscillator
- submarine oscillator
- sweep oscillator
- timing oscillator
- tri-tet oscillator
- tunable oscillator
- ultra-audion oscillator
- ultrasonic oscillator
- vacuum-tube oscillator
- velocity-modulated oscillator
- vertical oscillator
- voltage-controlled oscillator
- Wien-bridge oscillator
- X-tal oscillatorEnglish-Russian dictionary of telecommunications and their abbreviations > oscillator
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17 Hertzian wave
физ. электромагнитная волна -
18 radiation
1) излучение; радиация3) энергия излучения; лучистая энергия•- atmospheric radiation
- backfire radiation
- background radiation
- backscattered radiation
- backward radiation
- band-to-band radiation
- blackbody radiation
- broadside radiation
- Cerenkov radiation
- characteristic radiation
- coherent radiation
- complex radiation
- concomitant radiation
- cosmic radiation
- cyclotron radiation
- diffracted radiation
- direct radiation
- directed radiation
- electromagnetic radiation
- EM radiation
- end-fire radiation
- end-on radiation
- far-field radiation
- far-infrared radiation
- far-zone radiation
- forward-scattered radiation
- free-free transition radiation
- free-space radiation
- fringe radiation
- giant-pulse radiation
- Hertzian radiation
- horizontally polarized radiation
- impact radiation
- incident radiation
- incoherent radiation
- infrared radiation
- ionizing radiation
- Josephson radiation
- laser radiation
- leakage radiation
- local-oscillator radiation
- low radiation
- low-angle radiation
- maser radiation
- microwave radiation
- middle-infrared radiation
- monitor radiation
- monochromatic radiation
- multimodal radiation
- multimode radiation
- multipole radiation
- natural radiation
- near-infrared radiation
- near-ultraviolet radiation
- near-UV radiation
- noncoherent radiation
- nonionizing radiation
- nonpolarized radiation
- nuclear radiation
- omnidirectional radiation
- optical radiation
- oscillator radiation
- out-of-band radiation
- penetrating radiation
- polarized radiation
- primary radiation
- pumping radiation
- radio radiation
- Raman radiation
- Rayleigh radiation
- receiver radiation
- recombination radiation
- relict radiation
- residual radiation
- resonance radiation
- scattered radiation
- secondary radiation
- side-lobe radiation
- single-mode radiation
- sky radiation
- space radiation
- spontaneous radiation
- spurious radiation
- steady-state radiation
- stimulated radiation
- Stokes radiation
- stray radiation
- sub-mm radiation
- terrestrial radiation
- thermal radiation
- thermal radio radiation
- transient radiation
- ultraviolet radiation
- vacuum-UV radiation
- VDT radiation
- vertically polarized radiation
- video display terminal radiation
- visible radiation -
19 radiation
1) излучение; радиация3) энергия излучения; лучистая энергия•- atmospheric radiation
- backfire radiation
- background radiation
- backscattered radiation
- backward radiation
- band-to-band radiation
- blackbody radiation
- broadside radiation
- Cerenkov radiation
- characteristic radiation
- coherent radiation
- complex radiation
- concomitant radiation
- cosmic radiation
- cyclotron radiation
- diffracted radiation
- direct radiation
- directed radiation
- electromagnetic radiation
- EM radiation
- end-fire radiation
- end-on radiation
- far-field radiation
- far-infrared radiation
- far-zone radiation
- forward-scattered radiation
- free-free transition radiation
- free-space radiation
- fringe radiation
- giant-pulse radiation
- Hertzian radiation
- horizontally polarized radiation
- impact radiation
- incident radiation
- incoherent radiation
- infrared radiation
- ionizing radiation
- Josephson radiation
- laser radiation
- leakage radiation
- local-oscillator radiation
- low radiation
- low-angle radiation
- maser radiation
- microwave radiation
- middle-infrared radiation
- monitor radiation
- monochromatic radiation
- multimodal radiation
- multimode radiation
- multipole radiation
- natural radiation
- near-infrared radiation
- near-ultraviolet radiation
- near-UV radiation
- noncoherent radiation
- nonionizing radiation
- nonpolarized radiation
- nuclear radiation
- omnidirectional radiation
- optical radiation
- oscillator radiation
- out-of-band radiation
- penetrating radiation
- polarized radiation
- primary radiation
- pumping radiation
- radio radiation
- Raman radiation
- Rayleigh radiation
- receiver radiation
- recombination radiation
- relict radiation
- residual radiation
- resonance radiation
- scattered radiation
- secondary radiation
- side-lobe radiation
- single-mode radiation
- sky radiation
- space radiation
- spontaneous radiation
- spurious radiation
- steady-state radiation
- stimulated radiation
- Stokes radiation
- stray radiation
- sub-mm radiation
- terrestrial radiation
- thermal radiation
- thermal radio radiation
- transient radiation
- ultraviolet radiation
- vacuum-UV radiation
- VDT radiation
- vertically polarized radiation
- video display terminal radiation
- visible radiationThe New English-Russian Dictionary of Radio-electronics > radiation
-
20 De Forest, Lee
SUBJECT AREA: Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications[br]b. 26 August 1873 Council Bluffs, Iowa, USAd. 30 June 1961 Hollywood, California, USA[br]American electrical engineer and inventor principally known for his invention of the Audion, or triode, vacuum tube; also a pioneer of sound in the cinema.[br]De Forest was born into the family of a Congregational minister that moved to Alabama in 1879 when the father became President of a college for African-Americans; this was a position that led to the family's social ostracism by the white community. By the time he was 13 years old, De Forest was already a keen mechanical inventor, and in 1893, rejecting his father's plan for him to become a clergyman, he entered the Sheffield Scientific School of Yale University. Following his first degree, he went on to study the propagation of electromagnetic waves, gaining a PhD in physics in 1899 for his thesis on the "Reflection of Hertzian Waves from the Ends of Parallel Wires", probably the first US thesis in the field of radio.He then joined the Western Electric Company in Chicago where he helped develop the infant technology of wireless, working his way up from a modest post in the production area to a position in the experimental laboratory. There, working alone after normal working hours, he developed a detector of electromagnetic waves based on an electrolytic device similar to that already invented by Fleming in England. Recognizing his talents, a number of financial backers enabled him to set up his own business in 1902 under the name of De Forest Wireless Telegraphy Company; he was soon demonstrating wireless telegraphy to interested parties and entering into competition with the American Marconi Company.Despite the failure of this company because of fraud by his partners, he continued his experiments; in 1907, by adding a third electrode, a wire mesh, between the anode and cathode of the thermionic diode invented by Fleming in 1904, he was able to produce the amplifying device now known as the triode valve and achieve a sensitivity of radio-signal reception much greater than possible with the passive carborundum and electrolytic detectors hitherto available. Patented under the name Audion, this new vacuum device was soon successfully used for experimental broadcasts of music and speech in New York and Paris. The invention of the Audion has been described as the beginning of the electronic era. Although much development work was required before its full potential was realized, the Audion opened the way to progress in all areas of sound transmission, recording and reproduction. The patent was challenged by Fleming and it was not until 1943 that De Forest's claim was finally recognized.Overcoming the near failure of his new company, the De Forest Radio Telephone Company, as well as unsuccessful charges of fraudulent promotion of the Audion, he continued to exploit the potential of his invention. By 1912 he had used transformer-coupling of several Audion stages to achieve high gain at radio frequencies, making long-distance communication a practical proposition, and had applied positive feedback from the Audion output anode to its input grid to realize a stable transmitter oscillator and modulator. These successes led to prolonged patent litigation with Edwin Armstrong and others, and he eventually sold the manufacturing rights, in retrospect often for a pittance.During the early 1920s De Forest began a fruitful association with T.W.Case, who for around ten years had been working to perfect a moving-picture sound system. De Forest claimed to have had an interest in sound films as early as 1900, and Case now began to supply him with photoelectric cells and primitive sound cameras. He eventually devised a variable-density sound-on-film system utilizing a glow-discharge modulator, the Photion. By 1926 De Forest's Phonofilm had been successfully demonstrated in over fifty theatres and this system became the basis of Movietone. Though his ideas were on the right lines, the technology was insufficiently developed and it was left to others to produce a system acceptable to the film industry. However, De Forest had played a key role in transforming the nature of the film industry; within a space of five years the production of silent films had all but ceased.In the following decade De Forest applied the Audion to the development of medical diathermy. Finally, after spending most of his working life as an independent inventor and entrepreneur, he worked for a time during the Second World War at the Bell Telephone Laboratories on military applications of electronics.[br]Principal Honours and DistinctionsInstitute of Electronic and Radio Engineers Medal of Honour 1922. President, Institute of Electronic and Radio Engineers 1930. Institute of Electrical and Electronics Engineers Edison Medal 1946.Bibliography1904, "Electrolytic detectors", Electrician 54:94 (describes the electrolytic detector). 1907, US patent no. 841,387 (the Audion).1950, Father of Radio, Chicago: WIlcox \& Follett (autobiography).De Forest gave his own account of the development of his sound-on-film system in a series of articles: 1923. "The Phonofilm", Transactions of the Society of Motion Picture Engineers 16 (May): 61–75; 1924. "Phonofilm progress", Transactions of the Society of Motion Picture Engineers 20:17–19; 1927, "Recent developments in the Phonofilm", Transactions of the Society of Motion Picture Engineers 27:64–76; 1941, "Pioneering in talking pictures", Journal of the Society of Motion Picture Engineers 36 (January): 41–9.Further ReadingG.Carneal, 1930, A Conqueror of Space (biography).I.Levine, 1964, Electronics Pioneer, Lee De Forest (biography).E.I.Sponable, 1947, "Historical development of sound films", Journal of the Society of Motion Picture Engineers 48 (April): 275–303 (an authoritative account of De Forest's sound-film work, by Case's assistant).W.R.McLaurin, 1949, Invention and Innovation in the Radio Industry.C.F.Booth, 1955, "Fleming and De Forest. An appreciation", in Thermionic Valves 1904– 1954, IEE.V.J.Phillips, 1980, Early Radio Detectors, London: Peter Peregrinus.KF / JW
См. также в других словарях:
Hertzian oscillator — Herco virpiklis statusas T sritis fizika atitikmenys: angl. Hertz vibrator; Hertzian oscillator; Hertzian vibrator vok. Hertzscher Dipol, m; Hertzscher Oszillator, m rus. вибратор Герца, m; осциллятор Герца, m pranc. doublet élémentaire de Hertz … Fizikos terminų žodynas
hertzian oscillator — noun see hertz oscillator … Useful english dictionary
Hertzian vibrator — Herco virpiklis statusas T sritis fizika atitikmenys: angl. Hertz vibrator; Hertzian oscillator; Hertzian vibrator vok. Hertzscher Dipol, m; Hertzscher Oszillator, m rus. вибратор Герца, m; осциллятор Герца, m pranc. doublet élémentaire de Hertz … Fizikos terminų žodynas
Hertzian — Hertz i*an, a. Of or pert. to the German physicist Heinrich Hertz. [Webster 1913 Suppl.] {Hertzian telegraphy}, telegraphy by means of the Hertzian waves; wireless telegraphy. {H. waves}, electric waves; so called because Hertz was the first to… … The Collaborative International Dictionary of English
Hertzian telegraphy — Hertzian Hertz i*an, a. Of or pert. to the German physicist Heinrich Hertz. [Webster 1913 Suppl.] {Hertzian telegraphy}, telegraphy by means of the Hertzian waves; wireless telegraphy. {H. waves}, electric waves; so called because Hertz was the… … The Collaborative International Dictionary of English
hertz oscillator — noun or hertzian oscillator : an inductive and capacitive circuit in which electric oscillations resulting in the emission of Hertzian waves are set up by passage of a spark or otherwise … Useful english dictionary
Henri Poincaré — Infobox Scientist box width = 300px name = Henri Poincaré image size = 250px caption = Jules Henri Poincaré (1854 1912). Photograph from the frontispiece of the 1913 edition of Last Thoughts. birth date = birth date|df=yes|1854|4|29 birth place … Wikipedia
Mass–energy equivalence — E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the … Wikipedia
Herco virpiklis — statusas T sritis fizika atitikmenys: angl. Hertz vibrator; Hertzian oscillator; Hertzian vibrator vok. Hertzscher Dipol, m; Hertzscher Oszillator, m rus. вибратор Герца, m; осциллятор Герца, m pranc. doublet élémentaire de Hertz, m; oscillateur… … Fizikos terminų žodynas
Hertz vibrator — Herco virpiklis statusas T sritis fizika atitikmenys: angl. Hertz vibrator; Hertzian oscillator; Hertzian vibrator vok. Hertzscher Dipol, m; Hertzscher Oszillator, m rus. вибратор Герца, m; осциллятор Герца, m pranc. doublet élémentaire de Hertz … Fizikos terminų žodynas
Hertzscher Dipol — Herco virpiklis statusas T sritis fizika atitikmenys: angl. Hertz vibrator; Hertzian oscillator; Hertzian vibrator vok. Hertzscher Dipol, m; Hertzscher Oszillator, m rus. вибратор Герца, m; осциллятор Герца, m pranc. doublet élémentaire de Hertz … Fizikos terminų žodynas