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The depletion layer of tunnel diode is very small beacause______(a) its abrupt and has high dopants(b) uses positive conductance property(c) its used for high frequency ranges(d) tunneling effectI got this question in an interview.My query is from Tunnel Diodes and its Characteristics in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer»

The correct choice is (a) its abrupt and has high dopants

Easy explanation: When the P and N regions are very highly doped, the depletion layer comes closer. The TUNNEL diode is also highly doped. Its doping concentration VARIES within a small scale. So it’s an abrupt diode. For these reasons, the depletion region is small.



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