Which of the following statements about oscillator circuits is FALSE?

Question

Question

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RRB JE ECE 22 Apr 2025 Shift 2 CBT 2 Official Paper

A circuit that generates a sine wave without any input is called a linear oscillator.
A circuit that generates a non-sinusoidal wave without any input is called a linear oscillator.
The frequency of an oscillator depends on the RC or LC network.
Multivibrators are used for generating non-sinusoidal waveforms.

Answer 1

The correct answer is: 2) A circuit that generates a non-sinusoidal wave without any input is called a linear oscillator.

Linear Oscillators (Option 1 - TRUE)
- Generate sinusoidal waveforms (e.g., sine waves).
- Examples: LC oscillators (Hartley, Colpitts), RC oscillators (Wien Bridge, Phase Shift).
Non-Linear Oscillators (Option 2 - FALSE)
- Generate non-sinusoidal waveforms (e.g., square, triangle, sawtooth waves).
- Not called linear oscillators—they are called relaxation oscillators or multivibrators.
Frequency Determination (Option 3 - TRUE)
- Oscillator frequency depends on RC (resistor-capacitor) or LC (inductor-capacitor) networks.
Multivibrators (Option 4 - TRUE)
- Used to generate square waves, pulses, or other non-sinusoidal signals.
- Examples: Astable, Monostable, and Bistable multivibrators.