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Positive feedback is used in oscillators to keep them running or oscillating. An oscillator is basically an amplifier which has a feedback path from the output back to the input. This permits a portion of the output signal to get back to the input to "keep things going" in stage - to keep things oscillating. The feedback must be positive so that it will "contribute" to the stage being able to keep oscillating. If the feedback was negative, it would serve to damp the oscillation and to "kill" the oscillator.
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoAn amplifier becomes an oscillator when positive feedback is applied. It is the simple way to do it.
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Closed loop gain for feedback oscillators?
Feedback oscillators have a closed loop gain of
What do oscillators do?
Oscillators produce a waveform (mostly sine or square waves) of desired amplitude and frequency. They can take input from the output itself. For a complete oscillator circuit we require a feedback device, amplifier and feedback factor.
Viva questions for RC phase shift oscillator?
A phase-shift oscillator is a simple electronic oscillator circuit. It consists of an inverting amplifier element such as a transistor or op amp, with its output fed back into its input through an filterconsisting of a network of resistors and capacitors. The feddback network 'shifts' the phase of the amplifier output by 180 degrees at the oscillation frequency, to give positive feedback.[1] Phase shift oscillators are mostly used at lower frequencies, often in the audio frequency range as audio oscillators.
State four types of LC oscillators?
Four types of LC oscillators include voltage controlled oscillators, drift control oscillators, crystal oscillators, and tuned circuit oscillators. A tuned circuit oscillator is the most common type of oscillator.
What is the major difference between positive and negative feedback?
Positive feedback causes bodily processes to continue; negative feedback causes bodily processes to start or stop only cost you being in my basement
Closed loop gain for feedback oscillators?
Feedback oscillators have a closed loop gain of
Why you apply positive feedback for oscillators?
The question almost states itself. Without positive feedback, there can be no oscillation (at least of a steady-state type). The feedback must be applied at an appropriate part of the oscillatory cycle, as well as at the appropriate level.
Feedback oscillators have a closed loop gain of?
unity
Is there a way to harness the energy of electromagnetic feedback?
Indeed, without feedback we would not have oscillators in electronic circuits.
What type of feedback is used in the phase shift oscillator circuit?
Positive feedback
What do oscillators do?
Oscillators produce a waveform (mostly sine or square waves) of desired amplitude and frequency. They can take input from the output itself. For a complete oscillator circuit we require a feedback device, amplifier and feedback factor.
Which kind of feedback is used to reinforce correct behavior?
constructive feedback
What feedback is used in amplifier?
there are four types of feedback connetion. the one used is that which amplifies your input (Positive feedback).
Is blood pressure negative or positive feedback?
Is the clotting of blood an example of positive or negative feedback?
Are positive feedback and negative feedback both components of homeostasis?
No, negative feedback is the primary homeostatic mechanism regulating the endocrine system. Positive feedback is used much less frequently.
Oxygen loading a positive of negative feedback process?
oxygen loading is a positive feedback response
What is the difference between Positive feedback and Regenerative feedback?
positive feedback is always benificial but regenerative feedback may or may not.
