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Mr. Dubey • 53.48K Points
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Q. The number of semiconductor layers in IMPATT diode is:

(A) two
(B) three
(C) four
(D) none of the mentioned
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Explanation by: Mr. Dubey 
 impatt diode consists of 4 layers according to the construction. it consists of a p+ region and n+ layers at the two ends. in between these layers, a p type layer and an intrinsic region is sandwiched.

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