Very High Input Impedance Circuit MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Very High Input Impedance Circuit”.

1. Find the bias current from the given circuit

Find the bias current from the given circuit

a) 30mA
b) 3mA
c) 0.30mA
d) 0.03mA

2. How to choose an op-amp when working with high input source resistance?
a) Op-amp with low bias current
b) Op-amp with higher slew rate
c) Buffer or voltage follower
d) All of the mentioned

3. Which among the following circuit has the highest input resistance?
a) Voltage follower
b) Inverting amplifier
c) Differential amplifier
d) None of the mentioned

4. What must be done to block the ac input voltage riding on a dc level?
a) Use RC network
b) Use coupling capacitor
c) Use resistive transducer
d) None of the mentioned

5. Find out AC-coupled voltage follower?
a)
Find the AC-coupled voltage from the given diagram
b)
Find thecoupling capacitor from the given diagram
c)
Find the voltage follower circuit and hold circuit from the given diagram
d) None of the mentioned

6. Compute the reference voltage for a fundamental log-amp, if it’s internal resistance=5MΩ.
a) 0.5µv
b) 0.05µv
c) 5µv
d) None of the mentioned

7. To get higher input resistance in AC coupled voltage follower,
a) The output resistance is bootstrapped
b) The input resistance is bootstrapped
c) The bias resistance is bootstrapped
d) The feedback resistance is bootstrapped

8. Voltage follower circuit are used in
a) Active filter
b) All of the mentioned
c) Sample and hold circuit
d) Bridge circuit with transducer

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