Differential Ecuation simple circuit

Thread Starter

omar-rodriguez

Joined Jun 24, 2015
67
Hello, I'm trying to find the differential equation of this circuit



but I got an Integro differential equation, I don't know what's next because the current function is on terms of tao and t at the same time

 

Thread Starter

omar-rodriguez

Joined Jun 24, 2015
67
Ok I did it and it looks like that


But I have one more quesion, why when I am finding the differential equation, I said that in this case


but when I apply laplace for example to a derivative, I have to replace the real values of the initial conditions derivative
 

anhnha

Joined Apr 19, 2012
880
The first case Vc(0) is a constant while the second case it is the value of capacitor derivative at the time t equals to 0 (first you derivative Vc and get dVc/dt then you evaluate it at t=0).
 
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