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An electronic oscillator gives sustained oscillations when the feedback is.
- a)in phase with the input
- b)negative
- c)positive
- d)out of phase with input
Correct answer is option 'A,B'. Can you explain this answer?
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An electronic oscillator gives sustained oscillations when the feedbac...
An electronic oscillator gives sustained oscillations when the feedback is negative and in phase with the input.
The correct answers are: negative, in phase with the input
The correct answers are: negative, in phase with the input
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An electronic oscillator gives sustained oscillations when the feedbac...
An electronic oscillator is a circuit that generates a continuous output signal of a specific frequency. It is an essential component in many electronic devices, such as radios, televisions, and computers. The sustained oscillations produced by an oscillator are the result of positive feedback.
1. **Positive Feedback**:
Positive feedback occurs when a fraction of the output signal is fed back to the input with the same phase. This feedback reinforces the input signal, causing it to grow exponentially, resulting in sustained oscillations. In an electronic oscillator, positive feedback is achieved through the use of an amplifier and a feedback network.
2. **In-Phase Feedback**:
When the feedback signal is in phase with the input signal, it reinforces the input signal, causing it to grow continuously. This leads to sustained oscillations. In an electronic oscillator, the feedback network is designed such that the feedback signal is in phase with the input signal.
3. **Negative Feedback**:
Negative feedback occurs when a fraction of the output signal is fed back to the input with a phase opposite to that of the input signal. This feedback tends to reduce the input signal, resulting in stability rather than sustained oscillations. Negative feedback is commonly used in amplifiers to improve stability and reduce distortion.
4. **Out-of-Phase Feedback**:
When the feedback signal is out of phase with the input signal, it tends to cancel out the input signal, leading to stability rather than sustained oscillations. In an electronic oscillator, if the feedback network is designed such that the feedback signal is out of phase with the input signal, the oscillator will not produce sustained oscillations.
Therefore, for an electronic oscillator to give sustained oscillations, the feedback must be in phase with the input signal (option A). Additionally, negative feedback (option B) should be avoided, as it would lead to stability rather than sustained oscillations.
In conclusion, sustained oscillations in an electronic oscillator are achieved through positive feedback, with the feedback signal being in phase with the input signal. Negative feedback and out-of-phase feedback would inhibit sustained oscillations.
1. **Positive Feedback**:
Positive feedback occurs when a fraction of the output signal is fed back to the input with the same phase. This feedback reinforces the input signal, causing it to grow exponentially, resulting in sustained oscillations. In an electronic oscillator, positive feedback is achieved through the use of an amplifier and a feedback network.
2. **In-Phase Feedback**:
When the feedback signal is in phase with the input signal, it reinforces the input signal, causing it to grow continuously. This leads to sustained oscillations. In an electronic oscillator, the feedback network is designed such that the feedback signal is in phase with the input signal.
3. **Negative Feedback**:
Negative feedback occurs when a fraction of the output signal is fed back to the input with a phase opposite to that of the input signal. This feedback tends to reduce the input signal, resulting in stability rather than sustained oscillations. Negative feedback is commonly used in amplifiers to improve stability and reduce distortion.
4. **Out-of-Phase Feedback**:
When the feedback signal is out of phase with the input signal, it tends to cancel out the input signal, leading to stability rather than sustained oscillations. In an electronic oscillator, if the feedback network is designed such that the feedback signal is out of phase with the input signal, the oscillator will not produce sustained oscillations.
Therefore, for an electronic oscillator to give sustained oscillations, the feedback must be in phase with the input signal (option A). Additionally, negative feedback (option B) should be avoided, as it would lead to stability rather than sustained oscillations.
In conclusion, sustained oscillations in an electronic oscillator are achieved through positive feedback, with the feedback signal being in phase with the input signal. Negative feedback and out-of-phase feedback would inhibit sustained oscillations.
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An electronic oscillator gives sustained oscillations when the feedback is.a)in phase with the inputb)negativec)positived)out of phase with inputCorrect answer is option 'A,B'. Can you explain this answer?
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