Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Unit step response of RC high pass filter

  1. Oct 19, 2012 #1
    what is the unit step response of a high pass RC filter ?
    I want to calculate using transfer function approach.
    My solution :
    Y(s)/X(s) = RCs/(1+sRC)

    taking inverse laplace transform we should get

    But if we consider Y(s)=RC/(1+sRC)
    RCsY(s) + Y(s) = RC
    then this is a non homogeneous equation
    so the solution should contain a dc term also which is a complementary function.
    but the previous solution i have written above does not contain the dc term.
    Please clarify this........
  2. jcsd
  3. Oct 19, 2012 #2
  4. Oct 20, 2012 #3

    The inverse Laplace of RCs/(1+sRC) is Dirac(t)-exp(-t/RC)/RC, not what you posted.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook