What is the concentration of impurities at the junction of a varactor diode?AlargeBsmallCconstant
Question
What is the concentration of impurities at the junction of a varactor diode?AlargeBsmallCconstant
Solution
The concentration of impurities at the junction of a varactor diode is small. This is because the varactor diode operates under reverse bias where the width of the depletion region is controlled by the applied voltage. The depletion region is devoid of free charge carriers and is formed between the layers of p-type and n-type semiconductors, which are doped with impurities to create the necessary positive and negative charges. Therefore, the concentration of impurities at the junction, which is within the depletion region, is small.
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