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Electronics and Communication Engineering - Microwave Communication - Discussion

Discussion Forum : Microwave Communication - Section 2 (Q.No. 2)
Microwave Communication
2.

Assertion (A): PIN diode can be used as attenuator and limiter.

Reason (R): PIN diode has a thin intrinsic layer.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
Answer: Option
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.

Discussion:
2 comments Page 1 of 1.
AJAY KUMAR MEENA said:   8 years ago
Worng pin diode have only one intrinsic layer.
RISHI NIGAM said:   3 years ago
Yes, in PIN I stands for intrinsic layer.
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