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When were filament tubes invented?
The first hot filament diode tube was invented in 1904 by Fleming, the first hot filament triode tube was invented in 1907 by DeForest. However it was not until 1913 that it was determined that high vacuum was actually needed for efficient and reliable operation of these tubes. So true hot filament vacuum tubes were not made and used until 1913.
Did vacuum tubes replace transistors?
No the Transistor replaced vacuum tubes in 1947 and later by integrated circuits.This was answered by ...John Nelson Brundage the third seventh grader at GAISER MIDDLE SCHOOL, VANCOUVER SCHOOL DISTRICT, VANCOUVER WASHINGTON
Why diode 0a79 is used in amplitude demodulation?
This is very old germanium diode and nomenclature comes before a standard had been established for semiconductors. They modeled 0A after the vaccum tubes where 0 - zero means 0Volts filament voltage and A meant single diode. Latter , semiconductor nomenclature come where the first number was telling a number of PN junctions followed by N (this is for US), Japanese and Europeans had different naming standards
Can you do amplification without transistor and is it possible to design oscillator using diode?
Magnetic amplifiers and vacuum tubes don't need transistors to amplificate electricity current. You can get a transistor by two oppositely connected diodes.
What purposes do electron tubes serve?
Electron tubes are used to manipulate electronic or electrical signals. They can be employed to convert AC to DC, amplify, attenuate, switch, mix, or generate audio or radio signals. Tubes have been mostly replaced by solid-state devices such as the transistor, but still have some applications in modern electronics.
Who is the inventor of vacuum tubes?
Sir John Ambrose Fleming patented the thermionic diode in 1904. Then Lee DeForest put a control grid into it to create the triode in 1906.
What are the different components?
Transistors,diode,vacume tubes and amplifiers
When were the vacuum tubes invented?
1904, a diode by Fleming.
What is diode volve?
I think you mean 'diode valve'! A 'valve' is the British term for what Americans call 'tubes' or, more accurately, 'vacuum tubes'. So, a 'diode valve' is a thermionic valve generally used as a rectifier, much in the same way that a semiconducting diode is used, these days.
What diode people use before the invention of zener diode?
gas filled cold cathode glow discharge tubes.
What is volves?
I think you mean 'diode valve'! A 'valve' is the British term for what Americans call 'tubes' or, more accurately, 'vacuum tubes'. So, a 'diode valve' is a thermionic valve generally used as a rectifier, much in the same way that a semiconducting diode is used, these days.
What are the different Active components?
Transistors,diode,vacume tubes and amplifiers
What existing device was adapted to create the first vacuum tubes?
I believe that after the light bulb was finished and promoted to prime time, Edison experimented on a light bulb with a second electrode inside it. This gave him the vacuum diode, and it wasn't long before Lee DeForest came along and added yet a 3rd element inside the bulb, which controlled the flow of current between the first two. That enhancement is described as the 'triode', which immediately had all kinds of applications as an oscillator and a small-signal amplifier.
Who and when the invention of vacuum tubes?
In connection with his work on the electric light, Thomas Edison played with a vacuum diode,which he made by adding a plate electrode to one of his incandescent bulbs. It was definitelya vacuum tube, but all it could do was rectify, which was certainly a valuable talent, but hadlimited usefullness.Dr. Lee DeForest added the grid electrode to Edison's diode, creating a triode with the ability topower-amplify small signals, and to create self-sustaining oscillation. I think that was in 1907.
What are the function of vacuum tubes?
The earliest vacuum tubes were used as direct display devices, and also as rectifiers of alternating current. In 1906 Lee De Forest invented the triode valve, from which all subsequent vacuum devices have devolved. The triode allowed the electronic amplification of electrical signals, and from this, our modern communications industries have developed. Amplifiers may be made into oscillators by applying feedback. The triode may also be made into a switch (of various sorts), and this is the base on which the digital industries are based. This craft embodies the technologies of electronics, combined with Boolean algebra and signal theory. Quite complex assemblies of valves may be combined, such as triode-hexode combinations. Very large power may be controlled by the triode principles. Modern Thyristor assemblies - today's solid-state equivalent of the vacuum tube - may be used to control Megawatts of power in High Voltage Direct Current transmission systems.
When were filament tubes invented?
The first hot filament diode tube was invented in 1904 by Fleming, the first hot filament triode tube was invented in 1907 by DeForest. However it was not until 1913 that it was determined that high vacuum was actually needed for efficient and reliable operation of these tubes. So true hot filament vacuum tubes were not made and used until 1913.
Was the first amplifying tube a triode?
If by triode, you mean "a three-electrode tube", then yes. You need a source of current into the device, a control electrode, and an "outlet" for the controlled current. Although there were radically different types of construction, all early amplifying tubes were triodes of some kind.
