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
51. A difference amplifiers exact common-mode rejection depends on
- Op-amp slew rate
- Resistor matching
- Capacitor ESR
- Supply ripple
52. An active notch filter can be built by combining
- Two low-pass only
- Low-pass and high-pass in parallel
- Two high-pass only
- Two band-pass in series
53. For a Wien-bridge oscillator, amplitude stabilization often uses
- Inductor
- Lamp or diodes in feedback
- Transformer
- Varactor
54. In a relaxation oscillator using an op-amp, the integrating component is
- Inductor
- Capacitor
- Transformer
- Varistor
56. A differentiator emphasizes
- Low frequencies
- Mid frequencies
- High-frequency changes
- DC levels
57. Active filters with op-amps are preferred over passive RC for low frequencies because they provide
- No gain
- Gain and low output impedance
- Only high Q
- Only high power handling
58. The slew rate of an op-amp limits a waveform generators
- DC offset
- Maximum output frequency and amplitude
- Input impedance
- Output resistance
59. A precision rectifier followed by an RC forms a
- RMS converter
- Envelope detector
- Frequency doubler
- Band-stop filter