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Physical electronics devices and ics miscellaneous

Physical Electronics Devices and ICs

  1. Consider the circuit shown in Figure (i). If the diode used here has the V-I characteristic as in Figure (ii), then the output waveform V0 is—


Correct Option: C

From given figure given that resistance of diode Rf =
dv
= 300 Ω
dI

and the diode will conduct for input voltage greater than 0.5 V.

The complete equivalent circuit of the diode can be given as for the positive half cycle.
.
so, V0 = (Vi – 0.5).
600
(600 + 300)

or V0 = 1.5 ×
600
900

or V0 = 1.0 V
However, for the negative half cycle of the input voltage Vi, the diode is in the non-conduction stage and we get zero output.
Hence alternative (C) is the correct answer.



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