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Recent content by arunkumar.kunjappan

  1. A

    Input Impedance of OP AMP

    I would like to know if there is any test circuit that can be used for measurement and/or simulation.
  2. A

    Input Impedance of OP AMP

    Hello, Can anyone suggest me a method to calculate the input impedance (both common mode and differential) of an OP AMP? Thanks in advance.
  3. A

    [SOLVED] Passive Low Pass Filter

    I am extreamly sorry Mr. Keith........ I have quoted the formula in reply to Mr. LvW's question.........
  4. A

    [SOLVED] Passive Low Pass Filter

    Thanks for explaining me the real cause of my problem...... I refered the formula "1/[2*pi*sqrt(R1R2C1C2)]".
  5. A

    [SOLVED] Passive Low Pass Filter

    Hi Guys, I have a RC LPF filter with fc=15.9KHz (R=10K and C=1nF). When I cascaded such two filters to form a second order filter and did an AC sweep, I got the new fc around 6KHz. But if I refer the formula for the fc of a second order filler with R1=R2 and C1=C2, I should get the same fc...
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