Electronic Devices and Circuit Theory-Oscillator Circuits Questions and Answers
Electronic Devices and Circuit Theory – Oscillator Circuits Questions with Answers cover one of the most fundamental areas in electronics. Oscillator circuits are used to generate periodic waveforms without any input signal. Understanding how these circuits work is essential for exams like GATE, ISRO, DRDO, and ECIL. This topic focuses on the design, analysis, and operation of oscillators including RC, LC, and crystal oscillators. Practicing these electronics MCQs and programming questions with answers helps learners strengthen their conceptual knowledge and prepare effectively for technical interviews and competitive exams.
Electronic Devices and Circuit Theory-Oscillator Circuits
Showing 10 of
40 questions
21. The twin-T oscillator produces a ________ response.
- low-pass
- high-pass
- band-pass
- band-stop
22. What is the typical value of quality factor for crystal oscillators?
- 20,000
- 1000
- 100
- 10
23. Which of the following improvements is (are) a result of the negative feedback in a circuit?
- Higher input impedance
- Better stabilized voltage gain
- Improved frequency response
- All of the above
24. In the Wien bridge oscillator, which of the following is (are) frequency-determining components?
- R1 and R2
- C1 and C2
- R1, R2, C1, and C2
- None of the above
25. A certain oscillator has a tap on the inductor in the tank circuit. This oscillator is probably
- a Colpitts oscillator.
- a Clapp oscillator
- a crystal oscillator.
- a Hartley oscillator.
26. At parallel resonance, the impedance of a crystal is
- minimum.
- maximum.
- equal
- zero.
27. Calculate the fr of a lead-lag network if R1 = R2 = 6.8 k, and C1 = C2 = 0.05 F.
- 468 Hz
- 4.68 kHz
- 46.8 kHz
- 468 kHz
28. Which of the following is (are) feedback?
- Voltage-series
- Voltage-shunt
- Current-series
- All of the above
29. What is the relationship between the series and parallel resonant frequencies of a quartz crystal?
- They are equal.
- Parallel resonant frequency is approximately 1 kHz higher than series resonant frequency.
- Series resonant frequency is approximately 1 kHz higher than parallel resonant frequency.
- none of the above
30. An op-amp integrator has a square-wave input. The output should be
- a sine wave.
- a triangle wave.
- a square wave
- pure dc.