High Frequency Op-Amp Equivalent Circuit MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “High Frequency Op-Amp Equivalent Circuit”.

1. What remedy can be followed to maintain the operating frequency in the op-amps?
a) Use LC circuit
b) Use resistor
c) Use capacitor
d) Use transistor

2. How does the physical characteristic of semiconductor account for the increase in frequency of op-amps?
a) Transistor values
b) Junction capacitance
c) Dopant concentration
d) None of the mentioned

3. Which factor is responsible for the gain of the op-amp to roll-off after a certain frequency is reached
a) Capacitive effect
b) Resistive effect
c) Inductor effect
d) None of the mentioned

4. How are op-amp with three break frequency are represented
a) Using two capacitors
b) Using three capacitors
c) Using one capacitor
d) All of the mentioned

5. Determine the high frequency model op-amp with single break frequency
a)
Find the high frequency model op-amp from the given diagram
b)
Find the single break frequency from the given diagram
c)
Fine the gain of the differential amplifier from the given diagram
d) None of the mentioned

6. Assume that the increase and decrease in the resistance of the strain gage element is by the same number of △R. Determine the unbalanced voltage equation.
a) V = – Vdc×(△R/R)
b) V = – Vdc×(△R/R+△R)
c) V = Vdc×(△R/R)
d) V = – Vdc×[(△R+ R)/R].

7. In what way the internal construction of the op-amp contribute to capacitive effect in op-amp?
a) Formation of junction capacitor
b) Due to internally connected capacitors
c) Formation of stray capacitor
d) None of the mentioned

8. The gain of the differential amplifier is -125. Assume the voltage applied to bridge circuit Vdc=+10v and the unstrained resistance of four element of strain gage is 200Ω. When a certain weight is placed on the platform, the output voltage Vo=5v. Determine the change in resistance of each strain gage for analog weight scale. (Assuming the output is initially nulled).
a) 1Ω
b) 0.8Ω
c) 0.3Ω
d) 1.83Ω

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