Special Purpose Op-Amp Circuits 1 Questions and Answers
Special Purpose Operational Amplifier (Op-Amp) Circuits are widely used in filters, oscillators, and voltage regulators. These circuits are essential for analog signal processing and control applications. In GATE, ISRO, and DRDO exams, aptitude questions and answers based on Op-Amp configurations, characteristics, and applications frequently appear. Understanding the working principles of comparators, precision rectifiers, and integrators helps students solve circuit-related problems efficiently. Practice aptitude questions and answers with explanations to enhance conceptual clarity and problem-solving skills in analog electronics.
Special Purpose Op-Amp Circuits 1
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59 questions
11. In an instrumentation amplifier, the first stage is typically
- Comparator
- Two buffers
- Two inverting amps
- Two integrators
12. Instrumentation amplifiers are preferred for sensors because they offer
- Low input impedance
- High bias currents
- High CMRR
- High output impedance
13. A comparator is used to
- Add signals
- Compare voltages and switch output
- Integrate signals
- Provide phase shift
14. A Schmitt trigger comparator adds
- Gain control
- Hysteresis
- Low-pass filtering
- Phase lead
15. Zero-crossing detector is a special case of
- Integrator
- Differentiator
- Comparator
- Oscillator
17. An ideal differentiators output for a ramp input is
- Ramp
- Constant
- Parabola
- Sinusoid
18. Practical integrators include a resistor in parallel with the feedback capacitor to
- Increase gain
- Limit low-frequency gain
- Eliminate phase shift
- Reduce input impedance
19. Practical differentiators include a capacitor at input and a resistor in series to
- Limit high-frequency gain
- Increase bandwidth
- Remove offset
- Reduce output swing
20. A precision rectifier solves the issue of
- Slew rate
- Diode forward drop
- Bandwidth
- Saturation voltage