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
41. A monostable op-amp circuit outputs
- Continuous oscillation
- One pulse when triggered
- No output
- Two alternating levels
42. A bistable op-amp circuit is also called
- Astable
- Monostable
- Schmitt trigger
- Flip-flop
43. A peak-to-peak detector measures
- RMS value
- Average value
- Maximum minus minimum
- Only maximum
44. For a precision rectifier, the op-amp must have
- Very low slew rate
- Adequate slew rate and bandwidth
- No input bias current
- Very low power
45. In a differentiator, increasing input capacitor value will
- Increase high-frequency gain
- Decrease corner frequency
- Increase corner frequency
- Remove phase shift
46. A comparator with positive feedback has two thresholds called
- Gain margins
- Hysteresis levels
- DC offsets
- Pole-zero pairs
47. A precision clamping circuit uses an op-amp to
- Increase ripple
- Set an accurate reference level
- Remove DC offset
- Add distortion
48. Chopper-stabilized amplifiers are used to reduce
- Bandwidth
- Input offset and drift
- Slew rate
- Output current
49. A Sallen-Key low-pass filter uses the op-amp as
- Inverting summing node
- Unity-gain buffer or gain stage
- Differentiator
- Comparator
50. In instrumentation amplifiers, gain is often set by
- One resistor between input buffers
- Two capacitors in feedback
- A transformer tap
- A zener diode