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What else can I help you with?
Why is it thatFET is called a voltage operated device?
since in an FET the value of the current depends upon the value of the voltage applied at the gate and drain...so it is known as voltage controlled device.. for example..in a mosfet..the current from drain to source depends upon the width of the depletion layer..which in turn depends upon the voltage applied on the gate.. so that is the reason
Why self bias is not used in enhansement type MOSFET?
Because for creating channal we need voltage at gate if there is no voltage at ate then VGS=0 this mean no amplificatiion can be done.
Define pinch off voltage and the gate source cut off voltage?
If negative voltage is applied to the gate of a NMOS, it repels electrons from the channel region towards the bulk of the p-substrate and attaract holes from p-substrate towards the channel. The recombination between holes and electrons causes a deplation of majority carriers in the channel. Enough nagative gate voltage can cause the channel depleted of majority carriers and cuts off the current between the source and the drain. The least negative gate voltage causing this is called gate-source cut off voltage.
How do you work thyristor?
The thyristor functions in such a way that when the anode voltage is greater than the cathode voltage , it is not triggered but only triggers when a gate signal is applied at the gate of the device.
How is an SCR turned off?
Once an SCR has been turned on by means of a gate pulse, it latches, or remains on. The only way to turn the SCR off is to either remove the anode to cathode voltage, remove the load current (SCR's have a minimum current below which they will not fire), or reverse bias the SCR. If the SCR is used in an AC circuit, turn off is easy. This is because the voltage falls to zero, then reverse biases the SCR every cycle. This naturally turns off the SCR. In fact, you have to re-trigger the gate every cycle to turn it back on. In a DC circuit, the SCR must be reset by some means as mentioned above. Once the SCR fires, there is nothing you can do to the gate to control the device. The gate only turns it on, not off. There is a similar device, called a GTO, or gate-turn-off device, that can be turned off via the gate. Once an SCR is on it will not turn -off unless the minimum holding current is met. that can be accomplished by reversing anode polarity or by decreasing loading to below holding current
How are silicon controlled thyrister different from gate turn off thyrister?
A; There is just no thyristor that can be turn off with the gate. Once on it will stay on until the holding current is reduced and or the voltage is reversed in polarity. The gate is only used to turn it ON never off.
What are the necessary conditions for turning ON an silicon controlled rectifier?
A: Two conditions one the gate has current flowing trough the other is forward voltage breakdown
Other name of voltage to current converter?
a FET, or Feild Effect Transistor. In a FET, the value of the current depends upon the value of the voltage applied at the gate and drain so it is known as a voltage controlled device. For example: In a MOSFET the current from drain to source depends upon the width of the depletion layer which in turn depends upon the voltage applied on the gate.
Why is it thatFET is called a voltage operated device?
since in an FET the value of the current depends upon the value of the voltage applied at the gate and drain...so it is known as voltage controlled device.. for example..in a mosfet..the current from drain to source depends upon the width of the depletion layer..which in turn depends upon the voltage applied on the gate.. so that is the reason
Why the Gate triggered method is always preferred to turn on the thyristor?
A: Because that is the controlling lead of an thyristor. .To do it otherwise it will be on-off at hi voltage only
Why self bias is not used in enhansement type MOSFET?
Because for creating channal we need voltage at gate if there is no voltage at ate then VGS=0 this mean no amplificatiion can be done.
How do you turn on a silicon controlled rectifier?
In the usual circuit, a pulse of voltage on the gate electrode, providing a very small current, will cause a large current to flow from anode to cathode. The SCR will stay on until the anode current is reduced to zero (which may be because it's an AC supply). More at http://www.allaboutcircuits.com/vol_3/chpt_7/5.html ANSWER: By applying a gate current of significant magnitude the SCR will turn on, It not an amplifier it does not amplify current it just conduct with the gate current It is possible to have more gate current then current trough it, the shut off point need not be zero voltage it can be negative to the anode or the falls below the holding current
How is an SCR turned on?
A: An scr is a 4 layer diode and has 3 terminals gate anode and cathode. To turn it on the gate must be positive with respect to the cathode and have enough voltage and current to turn it on. The turn on also depends on the load. Another possibility is to increase the potential cathode to anode until it will turn on but this mode is not predictable. Once on there only two way to shut it off. Remove to load below the holding current or momentarily reverse the voltage
What is happening to the voltage value of scr if its gate is triggered?
the anode-cathode voltage drops
Define pinch off voltage and the gate source cut off voltage?
If negative voltage is applied to the gate of a NMOS, it repels electrons from the channel region towards the bulk of the p-substrate and attaract holes from p-substrate towards the channel. The recombination between holes and electrons causes a deplation of majority carriers in the channel. Enough nagative gate voltage can cause the channel depleted of majority carriers and cuts off the current between the source and the drain. The least negative gate voltage causing this is called gate-source cut off voltage.
How do you turn a gate in minecraft?
You right click the gate
How do you work thyristor?
The thyristor functions in such a way that when the anode voltage is greater than the cathode voltage , it is not triggered but only triggers when a gate signal is applied at the gate of the device.
