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
Showing 10 of
59 questions
31. An active low-pass filter with op-amp commonly uses
- RL network
- RC network
- LC network
- Crystal
32. A first-order active low-pass filter roll-off is
- 6 dB/octave
- 12 dB/octave
- 18 dB/octave
- 24 dB/octave
33. A first-order high-pass filter has transfer magnitude rising at low frequency at
- 6 dB/octave
- 12 dB/octave
- 0 dB/octave
- 24 dB/octave
34. A band-pass filter passes
- All frequencies
- Only low frequencies
- Only high frequencies
- A limited mid-frequency range
35. A notch (band-stop) filter is used to remove
- All signals
- DC only
- A narrow unwanted frequency
- Only high frequencies
36. A Wien-bridge oscillator uses an op-amp with
- RC lead-lag network
- LC tank
- Quartz crystal
- RL network only
37. The condition for oscillation (Barkhausen) requires loop gain
- < 1 and 0 degrees phase
- = 1 and 0 degrees/360 degrees phase
- > 1 and 90 degrees phase
- < 1 and 180 degrees phase
38. A phase-shift oscillator typically needs how many RC sections for 180 degrees shift
- One
- Two
- Three
- Four
39. A square wave generator often uses an op-amp as a
- Comparator with hysteresis
- Integrator only
- Differentiator only
- Voltage follower
40. A triangular wave generator can be made using
- Two differentiators
- Integrator driven by a square wave
- Two comparators in series
- RC low-pass only