GATE EC 2016 Set 1 — Question 51
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Analog Circuits → Op-Amp Circuits → Ideal & Non-Ideal Op-Amp
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Question
A p-i-n photodiode of responsivity is connected to the inverting input of an ideal opamp as shown in the figure, , , Load resistor . If of power is incident on the photodiode, then the value of the photocurrent (in ) through the load is ________
Correct answer
790 to 810
Solution
1.Calculate the photocurrent generated by the photodiode:
.2.In the transimpedance amplifier configuration shown, this current flows through the feedback resistor . Since the inverting terminal is a virtual ground (), the output voltage is:
.3.The current through the load resistor connected to the output is:
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