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SCR is bipolar device since current is due to both electrons as well as holes.
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∙ 14y ago
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Is a diode a unipolar device?
No.
Is zener diode is unipolar device?
no...
How do you use scr as a diode?
scr is basically a three terminal device can be used as diode by leaving one terminal
Is scr current controlled device?
yes it is current controlled
Why BJT is called bipolar device and FET an unipolar device?
FETs can be called UNIPOLAR devices because the charge carriers that carry the current through the device are all of the same type i.e. either holes or electrons, but not both. This distinguishes FETs from the bipolar devices in which both holes and electrons are responsible for current flow in any one device.
Is a diode a unipolar device?
No.
Is zener diode is unipolar device?
no...
What is the Difference between bipolar and unipolar electronic device?
?!
Is SCR active device?
scr is active component because it's generated energy or amplified energy
What is avalanche break down in scr?
A: As the reverse voltage is applied to the SCR increases at a certain point the device will start to conduct that is defined as the breakdown voltage for that device
How do you use scr as a diode?
scr is basically a three terminal device can be used as diode by leaving one terminal
Is a SCR a voltage rating device or a current rating device?
Check the databook for the SCR you are using. Without knowing the part number, I can't look it up for you.
Is scr current controlled device?
yes it is current controlled
What is SCR Give its application?
scr is a silicon control rectifier used to control the rectifing voltage.. its a bidirectional device can use it for both the directions......
Why BJT is called bipolar device and FET an unipolar device?
FETs can be called UNIPOLAR devices because the charge carriers that carry the current through the device are all of the same type i.e. either holes or electrons, but not both. This distinguishes FETs from the bipolar devices in which both holes and electrons are responsible for current flow in any one device.
What is unidirectional device?
A device which operates(or function) only in one direction is called unidirectional (or unipolar) 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
