Discussion :: Microwave Communication
-
Assertion (A): PIN diode is commonly used for microwave control.
Reason (R): A PIN diode uses heavily doped p and n materials.
|
A.
Both A and R are correct and R is correct explanation of A
|
|
B.
Both A and R are correct but R is not correct explanation of A
|
|
C.
A is correct but R is wrong
|
|
D.
A is wrong but R is correct
|
Whatsapp
Facebook
Answer : Option B
Explanation :
A PIN diode has an intrinsic (i) layer between p and n layers. When reverse bias is applied depletion layers are formed at p-i and i-n junctions.
The effective/width of depletion layer increases by the width of i layer. It can be used as a voltage controlled attenuator.
At high frequencies the rectification effect ceases and impedance of diode is effectively that of i layer.
This impedance varies with the applied bias. It is used in high frequency switching circuits, limiters, modulators etc.
Be The First To Comment