Hi. I've been given a "complex" RC circuit that's been giving me trouble for days. Source is a square wave (-10,10V) but Unit Step is fine for now. As shown in the attachment, the circuit has just a single capacitor so I can reduce the circuit down to a Thevenin Equivalent to get the time constant, total current etc. But I'm looking for the current i(t) through the top resistor, R5, not through the capacitor. This is where I run into trouble..
Since I've found the total current, is setting up a current divider at t=0 and t="infinity" the right approach here? I've done this and my Final values agree but my Initial values (t=0) do not -- I believe this is because at t=0 I treat the capacitor as just a closed circuit ... but this isn't right is it? The current from the cap. is going to flow opposite the current elsewhere.... which to me makes things very complicated.
Thanks in advance for any advice
Since I've found the total current, is setting up a current divider at t=0 and t="infinity" the right approach here? I've done this and my Final values agree but my Initial values (t=0) do not -- I believe this is because at t=0 I treat the capacitor as just a closed circuit ... but this isn't right is it? The current from the cap. is going to flow opposite the current elsewhere.... which to me makes things very complicated.
Thanks in advance for any advice