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They are both commonly used electrical switches. Some of the differences are that whereas Mosfet switches are voltage driven devices and can only switch DC current, Thyristor switches are current driven and can switch both AC and DC.
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∙ 10y ago
Wiki User
∙ 12y agoMOS-FET is metal-oxide semiconductor field effect transistor
A thyristor is a general term for a 4-layer semiconducting device that acts as a switch
They are not at all the same.
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Power thyristor how to check?
A thyristor is a rectifier semiconductor between two electrodes that permit unidirectional flow in anodes and cathodes.The flow of the current can be switched by a gate electrode that controls main driven electrical devices.To check a thyristor the current flow (between emitter/collector terminals) is checked.Then a small base current is applied to see if the thyristor functions as a switch.
What is conduction angle in thyristor?
not a clue a A: It all depends on the thyristor. There are no calculation involved not until you look up the thyristor specifications and decide on the load of the thyristor then you may calculate or more likely choose.
Difference between de mosfet and e mosfet?
The basic difference is between JFET and enhanced MOSFET,although the construction of JFET and depletion MOSFET is different but their most of the characteridtics are same,i.e shockly equation can be applied on both of them,but in JFET we cant give to gate voltage, the +ve value,because it does not works, but in depletion we can give,but some limited +ve value. Now enhanced MOSFET is different,shockly equation cant be applied.The transfer characteristics are purely in +ve Vg region. i.e for E-MOSFET Vg should be > 0,for its proper function.
What is the function of thyristor?
Thyristor is a kind fast acting switch. These are fully controlled switches
What are depletion and enhancement mosfet?
A depletion MOSFET is a MOSFET that is normally on. It outputs maximum current when the gate-source voltage is 0V. As the gate-source voltage increases, the drain-source channel becomes more resistive and the current decreases. An enhancement MOSFET has the opposite behavior. It is normally off. It outputs no current when the gate-source voltage is 0V. As the gate-source voltage increases, the drain-source channel becomes less resistive and the current increases.
Can we replace a thyristor by a mosfet?
No because a mosfet does not work the same as a thyristor. In a thyristor the current flows even when the gate pulse is removed, until the current stops. That is not the case for a FET.
What is the difference between igfet and mosfet?
Both are the same!
What is the difference between depletion type and enhancement type MOSFET?
bnder
What is the difference between mosfet and photo diode?
the current in mosfet is controlled by electric field where as in poto diode is controlled by intensity of light
Difference between de-mosfets e-mosfets and jfets?
The basic theory of operation is the same, but the device structure is different. With both a MOSFET and a JFET, a conductive channel is established between two terminals (the drain and the source). The structure of the gate terminal makes the difference between the two. In a MOSFET, the metal gate is separated from the channel by an insulator (the O in MOSFET means Oxide, the insulator). In a JFET the gate is a doped region essentially within the conductive channel.
What is the difference between thyristor fuse and normal fuse?
A: THYRISTOR can be used to clamp damaging energy as opposed to a fuse that must blow open and invariably takes time to blow. A thyristor is much faster and controllable actually if the problem disappear it can be made to open up again and restore power for normal operation.
What is ac chopper?
AC chopper is also called AC voltage controller. In AC voltage controller, we use 2 thyristors as switching element. In AC chopper we use MOSFET or IGBT as switching element with diodes in bridge rectifier for bidirectional flow of current. This use of mosfet switch has the following advantages over thyristor: * no separate firing circuit are needed for Mosfet ( it can be driven directly by interfacing it with MC) whereas firing circuits are needed for SCR. *when the line current drops to zero SCR turns off due to natural commutation( when it reaches 172 deg) ; mosfet- user control - we can turn on and off as per our requirement. * snubber circuit is needed for thyristor phase control method. By using mosfet in diode rectifier provides internal snubber
What is the difference between firing and triggering a thyristor?
There is no difference. The terms "firing" and "triggering" both mean exactly the same.As long as the voltages applied to both the anode and the gate have the correct values and polarities for a particular design of thyristor, "firing" or "triggering" will cause current to switch on between the thyristor's anode and cathode. The current will then continue to flow for as long as the correct source voltage polarity is maintained onto the anode.Another opinionIf the input signal is given to a thyristor, it is said to be gated. Because of gating pulse the thyristor gets triggered ( cause & effect relationship). Once the thyristor is triggered the charged particles starts moving inside the different layers. A noise is created called "SHOT NOISE", due to the movement of charged particles. Heat energy is dissipated due to this movement of charged particles. Once the thyristor reaches this stage it is said to be fired. Hence, there is a minute difference between these three terms. But all these terms are being used interchangeably.
Advantages and disadvantages of depletion MOSFET?
Since the logic operations of depletion MOSFET is the opposite to the enhancement MOSFET, the depletion MOSFET produces positive logic circuits, such as, buffer, AND, and OR. The most significant advantage of the positive logic circuits is that it can produce positive feedback easily so that a single depletion MOSFET can become a memory cell. In contrast, you will need at least two enhancement MOSFET transistor to produce the positive feedback to build a memory cell. The other advantages of depletion MOSFET are that it is free from sub-threshold leakage current and gate-oxide leakage current. Since there is always a potential difference of Vdd between the gate terminal and channel for an enhancement MOSFET to cause the gate-oxide leakage current, the gate oxide leakage current is unavoidable when the transistor shrinks in size and oxide layer becomes thinner. The depletion MOSFET does not have this problem because there is no potential difference between the gate and channel. As a enhancement MOSFET shrinking in size, there is no way to stop the subthreshold leakage current diffused across from source to drain because the drain and source terminals are closer physically. This is not a problem for depletion MOSFET because a pinched channel will stop the diffusion current completely. The depletion MOSFET is the ideal, perfect transistor. The only disadvantage of depletion MOSFET is its inability to produce negative logic operations.
Can depletion mosfet act as enhancement mosfet?
It depends. A depletion MOSFET can be used as an ehancemnet MOSFET when it is operated as an analog amplifier. However, a depletion MOSFET can't replace an enhancement MOSFET when it is operated as a digital switch. When a depletion MOSFET is used as a digital switch, since the junction between source terminal and substrate must be reverse biased, the voltage of the source terminal of an N typde transistor must be tied to Vdd, and it is completely opposite to an enhancement MOSFET. When a depletion MOSFET is used as an analog amplifer, the source terminal and the substrate are both at the same potential, just like an enhancement MOSFET.
Power thyristor how to check?
A thyristor is a rectifier semiconductor between two electrodes that permit unidirectional flow in anodes and cathodes.The flow of the current can be switched by a gate electrode that controls main driven electrical devices.To check a thyristor the current flow (between emitter/collector terminals) is checked.Then a small base current is applied to see if the thyristor functions as a switch.
What is a mosfet amplifier?
what is a mosfet amplifier
