Hi,
I am working with capacitor now and I have this question. I am applying a square wave (from 0 to 5V) on a RC circuit.
At the output ( at the resistor) I get a positive and negative values? why is that ?
I am suspecting the fact that the capacitor create a phase difference of -90 degree(between voltage and current)..but I cannot figure out the correct answer.
please can someone help me?

 

when your square goes to 5V the capacitor charges to 5V (5V on the +terminal
and 0V on the -terminal). Your square wave then goes to 0V so you now have 0V
on the +terminal. Since the voltage across the capacitor cannot change instantly
and the +terminal is 5V greater than the -teminal the -terminal has to be at -5V.

(* jcl *)

----

www.luciani.org

 

Thank you John!