Silambarasan Physics posted an Question
December 10, 2021 • 00:16 am 10 points
  • CSIR NET
  • Physical Sciences

An rc network produces a phase shift of 30. how many such rg networks should be cascaded together and connected ioacommon emitter amplifier so thaf the final ci

An RC network produces a phase shift of 30. How many such RG networks should be cascaded together and connected ioacommon emitter amplifier so thaf the final circuit behaves as an oscillator ? (B) 6 (A) 3 (C) 9 (D) 12

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  • Swapnadeep goswami Best Answer

    According to Barkhausen criterion,total phase shift should be 360° or equivalent to 360° or 0°,now by default common emitter amplifier provides a phase shift of 180° ,so to achieve additional 180° phase shift we need 180/30=6 RC networks

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