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Transfer function RC - circuit

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Alexandru Miculescu
回答： Alexandru Miculescu 2015-4-4
Hi!
Suppose R = C = 1 then the transfer function from the input voltage to the voltage across the capacitor is 1/ (s+1). So Vc(S) / V(S) = 1/(s+1). Getting back to time-domain: Vc(t) = V(t) * e^-t. What's wrong here? It should have been V(t) ( 1 - e^-t ).
The rising function is step( transfer_function ) and the decaying one is ezplot ( ilaplace ( transfer_function )). Why are these two not the same?
Thank you!
  1 个评论
Star Strider
Star Strider 2015-4-4
What does the circuit look like?
Where are you measuring the output voltage?

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回答（1 个）

Alexandru Miculescu
Problem solved! It had to been multiplied with 1/s (step response) then converted to time domain. Thank you anyway!!!

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