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Tunnel diodes are made up of________

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Tunnel diodes are made up of________

(a) Germanium and silicon materials

(b) AlGaAs

(c) AlGaInP

(d) ZnTe

I have been asked this question at a job interview.

The query is from Tunnel Diodes and its Characteristics topic in portion Semiconductor-Diode Characteristics of Electronic Devices & Circuits

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The correct answer is (a) Germanium and silicon materials

To explain: Germanium and silicon materials have low band gaps and flexibility. That matches tunnel diode requirements. The remaining materials emits the energy in terms of light or heat.

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