resonance frequency waves

Discussion in 'Physics' started by samjesse, Apr 5, 2012.

  1. samjesse

    Thread Starter Active Member

    Sep 14, 2008
    202
    0
    Hi

    Can resonance in a LC circuit be obtained using square or saw tooth wave instead of sin wave of the same frequency?
    If no. why?
    thx
     
    Last edited: Apr 5, 2012
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    It can.

    The problem is, any wave other than a sin wave has a lot of harmonics, multiples of the base frequency. This is a huge amount of wasted energy that does nothing but splatter the air waves and tick off the authorities, if you are talking RF.

    http://en.wikipedia.org/wiki/Fourier_series

    Fourier analysis is the mathematics that specializes in these kind of problems.

    http://en.wikipedia.org/wiki/Fourier_analysis

    A tuned circuit (LC) strips the harmonics and leaves the sine wave form that is the fundamental frequency.
     
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