State the Barkhausen criterion for sustained oscillation. Explain the operation of Hartley Oscillator. A Hartley oscillator oscillates with 10 MHz frequency. Determine the total inductance, L forming the tank circuit with 5 pF capacitor.

The Barkhausen criterion is a set of conditions that must be satisfied for sustained oscillation to occur in a feedback system, particularly in electronic circuits. For an oscillator to sustain oscillations, the product of the loop gain (Aβ) must be equal to or greater than 1, __________ ______ ________ _________ _________ __________ ____ _______ _____ ___.
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