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what is Barkhausen Criterion?

Answer Posted / mani

A criterion used to determine the stability of an oscillator
circuit which states that, if the circuit is seen as a loop
consisting of an amplifier with gain A and a linear circuit
whose gain &#946;(j&#969;) depends on frequency &#969;, then the loop will
oscillate with a perfect sine wave at some frequency &#969;0 if
at that frequency A&#946;(j&#969;0) = 1 exactly, that is, if the
magnitude of A&#946;(j&#969;0) is exactly 1 and its phase is 0° or 360°.

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