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Photo-diodes work in _________(a) forward biased(b) reverse biased(c) independent of forward and reverse biasing(d) any configurationThe question was asked during a job interview.My question is based upon Photoelectric Transducers in chapter Physiological Transducers of Biomedical Instrumentation

Answer»

The correct option is (b) reverse biased

To elaborate: The PHOTODIODE is a P-N junction semiconductor diode. It ALWAYS operated in the reversed biased CONDITION. The light is always focused through a GLASS lens on the junction of the PHOTO diode.



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