phase shift at resonance

Discussion in 'General Electronics Chat' started by samjesse, May 8, 2014.

  1. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    Hi

    Using LTspice, I noticed with a LC tank circuit pulsed by an AC that at the resonance frequency there is a phase shift from 90° to 270°.

    Is that correct? And if so, why the sudden shift and not gradual?

    Many thx
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    because the xC = xL at resonance. the phase shift is opposite for the l and the c, at any other frequency, they arent.
     
  3. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    Is this phase shift between the peaks of the current at each of the components (inductor and capacitor)?
     
  4. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    http://www.allaboutcircuits.com/vol_2/chpt_6/1.html

    explains the phase shift between the capacitor volt and the inductor current.

    Is the phase degree jump from 90 to 270 in LTspiace at resonance indicative of the the phase between the capacitor volt and inductor current for this circuit?
     
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