Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Reverse recovery time for a diode is?a)Time t...
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Reverse recovery time for a diode is?
- a)Time taken to eliminate excess minority charge carriers
- b)Sum of storage time (TS) and transition time (TT)
- c)Time taken to eliminate excess majority charge carriers
- d)Time elapsed to return to non conduction state
Correct answer is option 'A'. Can you explain this answer?
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Reverse recovery time for a diode is?a)Time taken to eliminate excess ...
The time period for which diode remains in conduction state even in reverse direction is called storage time. The time elapsed to return the non conduction state is called transition time. Their sum is called reverse recovery time.
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Reverse recovery time for a diode is?a)Time taken to eliminate excess ...
Reverse recovery time for a diode is the time taken to eliminate excess minority charge carriers. This is an important parameter in diode applications as it affects the switching speed and efficiency of the diode.
Explanation:
When a diode is forward biased, majority charge carriers (electrons in N-type and holes in P-type) flow freely across the junction, resulting in conduction. However, when the diode is reverse biased, these majority carriers are blocked by the depletion region of the junction.
During the transition from forward to reverse bias, there is a brief period where the diode acts like a short circuit due to the stored charge in the depletion region. This is known as the storage time.
After the storage time, the excess minority charge carriers (electrons in P-type and holes in N-type) must be eliminated before the diode can return to its non-conducting state. This process is known as the reverse recovery time.
The reverse recovery time can be divided into two components:
1. Charge removal time: This is the time taken to remove the excess minority charge carriers from the depletion region.
2. Trailing edge time: This is the time taken for the reverse current to fall to zero after the minority carriers have been removed.
The reverse recovery time is an important parameter in diode applications as it affects the switching speed and efficiency of the diode. A shorter reverse recovery time results in faster switching speeds and lower power losses.
In summary, the reverse recovery time for a diode is the time taken to eliminate excess minority charge carriers, and it is an important parameter for diode applications.
Explanation:
When a diode is forward biased, majority charge carriers (electrons in N-type and holes in P-type) flow freely across the junction, resulting in conduction. However, when the diode is reverse biased, these majority carriers are blocked by the depletion region of the junction.
During the transition from forward to reverse bias, there is a brief period where the diode acts like a short circuit due to the stored charge in the depletion region. This is known as the storage time.
After the storage time, the excess minority charge carriers (electrons in P-type and holes in N-type) must be eliminated before the diode can return to its non-conducting state. This process is known as the reverse recovery time.
The reverse recovery time can be divided into two components:
1. Charge removal time: This is the time taken to remove the excess minority charge carriers from the depletion region.
2. Trailing edge time: This is the time taken for the reverse current to fall to zero after the minority carriers have been removed.
The reverse recovery time is an important parameter in diode applications as it affects the switching speed and efficiency of the diode. A shorter reverse recovery time results in faster switching speeds and lower power losses.
In summary, the reverse recovery time for a diode is the time taken to eliminate excess minority charge carriers, and it is an important parameter for diode applications.
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Reverse recovery time for a diode is?a)Time taken to eliminate excess minority charge carriersb)Sum of storage time (TS) and transition time (TT)c)Time taken to eliminate excess majority charge carriersd)Time elapsed to return to non conduction stateCorrect answer is option 'A'. Can you explain this answer?
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