GATE EE 2017 Set 1 — Question 35
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Analog & Digital Electronics → Diode Circuits → Ideal & Non-Ideal Op-Amp
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Question
The approximate transfer characteristic for the circuit shown below with an ideal operational amplifier and diode will be
Correct answer
(A) [figure]
Solution
The circuit is a non-inverting precision half-wave rectifier.
1.Case : The op-amp output tries to go positive, forward-biasing the diode . The feedback loop closes, and due to virtual short, . Since is connected to the inverting terminal, .
2.Case : The op-amp output tries to go negative, reverse-biasing the diode . The feedback loop is broken. The output is pulled to ground through the resistor , so .
This behavior matches the transfer characteristic in graph (A).Continue learning with Success Tracker
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