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What is positive feedback in a transisto...

What is positive feedback in a transistor oscillator ?

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The use of a part of the output voltage of a transistor oscillator to control its performance is called feedback. In positive feedback, the feedback voltage is in phase with in the input so that the feedback is used to enhance the input.
Note :- In negative feedback, the feedback voltage is `180^@` out of phase with the input and reduces the input.
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