A triode refers to a vacuum tube amplifier or switch of the simplest form. It has three parts: A heated cathode, a control grid and an collection plate anode.
Electrons are emitted from the cathode and drawn towards the positive anode. Interposed between the two is a control grid that controls the cathode-to-anode electron flow by being charged appropriately, for example a negative charge (ground) on the grid will hamper the flow since the negative electron charge on the grid will obstruct the electron flow to the positive anode.
There are a number of variations in electronic tube designs. Even though tubes have been supplanted by solid state designs generally, they still have many valuable uses.
A transistor is a solid state device made of "P" and "N" type materials so arranged as to modify the current through it to amplify or switch current flow.
There are also many types of solid state transistor designs and they are now far more common than electron tubes.
the difference one is a voltage amplifier and the other is a current amplfier that is the major difference.
Further important differences:
Vacuum-tube triodes need some hundreds of milliwatts to watts just to light the filament/heater. This is wasted power that can appear as waste heat in the circuit, and reduces the electrical efficiency of the vacuum-tube triode. Triodes also have limited lifetimes, commonly due to the filament/heater burning out, or losing its electron emission. Transistors have no such limitations and are (i) much more efficient, (ii) can run at much lower power, and (iii) have very long lifetimes.
Vaccuum-tube triodes cannot be made much smaller than around 10 mm/half an inch in diameter, and maybe the same length. Transistors can be made at the nanometre scale, so transistor electronics are much more compact. Imagine putting together a USB memory chip with (at least) 32,000,000,000 triodes!
Conventional triodes are able to operate to about 5 GHz (5000 MHz). Some special valves can work at higher frequencies, about around 100 GHz is the limit. Such valves are large, expensive, and have high noise figures. Low-noise, small, cheap transistors exist that can easily work past 100 HGz.
One big difference is that Transistor consist of three layers pnp or npn, while thyristor hove four layers pnpn.
As far as functioning is concern, in transistor whenever gate voltage is above threshold transistor is in on state. when you remove gate current transistor turns off. In case of thyristor, when you supply gate current, it is triggered and start conducting. Now even if you remove gate current it will be in on state. Thyristor will turnoff if the voltage across it falls threshold level. Thus unlike transistor in thyristor we don't have to supply regular gate current, instead we just need to trigger it by gate current than it will conduct on it's own
Triode is an obsolete form of a Transistor.
A Diode has two terminals and enable current to be flowed only in one direction. So its a current flow direction regulator.
A Triode has three terminals, anode, cathode and grid. As a transistor, a triode was used as an amplifier of current. The current will flow from the anode to the cathode. The voltage applied to the grid will control the amount of current that will flow, and thus, it regulates the level of amplification.
Clarification. The above confuses thermionic valves and transistors.
First, triode IS NOT an obsolete form of transistor, because...
A triode is an electronic device with three electrodes: current input, control and current output.
In a thermionic valve (vacuum tube) the electrodes are cathode, grid and anode.
In a biploar junction transistor (what most people mean by "transistor"), the elctrodes are emitter, base and collector.
In a field-effect transistor (JFET, MOSFET, IGFET), the electrodes are source, gate and drain.
A transistor can act as an amplifier. An amplifier you use for music might have many transistors as well as many other types of components. Transistors have other applications as well.
A diode has one semi-conductor junction and a transistor has two.
Difference between transistor and amplifier
grid
Its a diode electricity add me on 2go samuel7447 and get more answers ...
gunn diode is transfered electron device & PIN diode is semiconductor device
With a diode tube you have no control over the current flow and it can only be used as a rectifier, where the triode consist of a control grid, to control the flow of electrons that will reach the anode, this make it possible to use the triode as a amplifier, compared to a transistor the control grid have the same function as the base of the transistor.Advantages?Over tetrodes and pentodes:1. Operation at higher radio frequencies,2. Lower noise figures,3. Simpler circuitry and only one power supply.
Simple diode is a two-terminal pn-junction with appropriate contacts for connecting the junction to external circuits. Power diode is formed by alloying, diffusion, and epitaxial growth. The modern techniques in semiconductor fabrication processes permit the desired device characteristics. The operation of power diodes is similar to that of signal diodes; but it has larger power-, voltage-, and current-handling capabilities than those of ordinary diodes. Switching speed of the power diodes is low compared to that of signal diodes.
the High voltage rated diodes are power diodes while of low rating or normal voltage rating are considered to as ordinary / normal diode
Hard to answer this one.The triode is a diode with a control electrode (the grid) added.The only useful answer is that a triode is a voltage-controlled doide.Try asking the question so that it can be answered more usefully.
Its a diode electricity add me on 2go samuel7447 and get more answers ...
A crystal triode is the old term for transistor. Crystal diodes were well established by the time transistors were invented, so using vacuum tube terminology, the logical name for a diode whose current could be controlled by a third element was "crystal triode".
The zener diode is optimized for reverse breakdown voltage accuracy and stability. This value and its tolerance is specified in more detail than a normal diode.
Actually it can be used as a diode, but rarely is. Just connect the grid and plate together and it has been reduced to a diode. There are also certain circuits that use the cathode and grid as a diode, while also obtaining an amplified output on the plate.
Thomas Edison tended to hold on to a particular idea too long. As a result Edison held on to the idea of using direct current instead of alternating current much too long. Edison invented the diode. When the triode was invented Edison continued to try to accomplish with the diode what the triode accomplished easily. His weakness was he did not see when an idea should be dropped.
In1883 THOMAS EDISON discover the electron and it,s the begning of electronics after that FLEMING discover the diode and then DE FOREST discover the triode which is called transistor
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.
A light-emitting diode (LED) emits light when an electric current passes through it. A photodiode, on the other hand, generates an electric current when exposed to light. In summary, an LED produces light, while a photodiode detects light.
difference between detector and diode
gunn diode is transfered electron device & PIN diode is semiconductor device
Zener diode is heavily doped pn junction diode.