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phase shift oscillator

Discussion in 'Electronic Basics' started by sri kanth, Nov 14, 2006.

  1. sri kanth

    sri kanth Guest

    Here is iam diong a work the pahe shift contain 360degree how can we
    explain the phase of transister as simple.
     
  2. Bob Eld

    Bob Eld Guest

    The common emitter connection of a transistor inverts 180 deg. In a Phase
    Shift Oscillator an other 180 degrees of phase shift is created by an R-C
    circut usually with three capacitors and three resistors. This circuit is in
    the feed back path from collector to base of the transistor such that the
    total phase shift is the sum of both, or 360 deg. The transistor must has
    sufficient voltage gain to make up all loses in the phase shift network so
    that the total gain around the loop is unity.
     
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