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low pass or high pass filter

Discussion in 'Electronics Homework Help' started by vasanth, Apr 10, 2014.

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  1. vasanth


    Apr 10, 2014
    Please clarify whether the filter in the image file is high pass or low pass filter.
    and help me How to find type of the filter circuit.

    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    You can answer that for yourself:
    Ask: what happens, if DC (=very, very, very low frequency) is applied? How do the capacitors behave, how the inductor?
    Conversely: At very high frequencies, what is the impedance of the capacitors, what is the impedance of the inductor?
    This will give you a basic answer.

    For an exact answer you need to analyze the circuit and calculate the freqeuncy response. You will notice that there is a resonance (pole in the equation) due to the LC elements.
  3. LvW


    Apr 12, 2014
    @vasanth: While doing the analysis as recommended in the previous post don´t forget that working filter circuits are connected to a
    * source with a certain internal resistance (impedance?) , and
    * to a load inpedance which processes the filtered signal.

    Both impedances influences the filter characteristic.
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