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Pulsed DC RLC circuit resonance

Discussion in 'Homework Help' started by electronice123, Dec 20, 2008.

  1. electronice123

    Thread Starter AAC Fanatic!

    Oct 10, 2008
    In a DC RLC circuit:

    Is there inductive and capacitive reactance in a pulsed DC RLC circuit?

    Can there be a lead or Lag of current in a pulsed DC RLC circuit?
    Please explain.

    Is it possible in a Pulsed DC RLC circuit to make the current lag so it never reaches the load? What would do this?
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    1. Of course there is - the voltage is changing at a substantial rate when the pulse is applied and stopped.

    2. The same effects of capacitive and inductive reactance apply in the situation.

    3. Lagging by 90 deg does not mean it never gets there. Also -think of the very low impedance path through the capacitor.
  3. KL7AJ

    AAC Fanatic!

    Nov 4, 2008

    Indeed. And you can excite (R)LC circuits to "ring" at any harmonic of the pulse base frequency. (if the duty cycle is 50%, you can only get odd harmonics, but if it is anything else, you can also get even harmonics. And if it's a very very short pulse, you can get ALL harmonics.

  4. electronice123

    Thread Starter AAC Fanatic!

    Oct 10, 2008

    Thanks for the help!!!