problem with inverse laplace transform

*To*: mathgroup at smc.vnet.net*Subject*: [mg106827] problem with inverse laplace transform*From*: nukeymusic <nukeymusic at gmail.com>*Date*: Sun, 24 Jan 2010 05:42:45 -0500 (EST)

I'm trying to calculate the response of a simple low pass RC-filter with time constant tau=33us to a square wave with amplitude 3V: hs=1/(1+tau*s) hps=1(1-Exp[-tee*s]) ; this is necessary to make it periodic with period tee tau=33.0*^-6 tee=330.0*^-6 ui1s=3/s ui2s=-6/s*Exp[-tee/2*s] uis=(ui1s+ui2s)*hps uos=uis*hs uot=InverseLaplaceTransform[uos,s,t] Plot[uot,{t,0,660*^-6}] Unfortunately mathematica doesn't seem to give me the plot I was looking for. When I leave out hps in the expression for uis I do get the correct result however. Does anyone here know how to solve this correctly? best regards