Given the circuit shown in the attached picture, of a constant current source (i) with a series switch to a load consisting of a resistor (P) in parallel to a capacitor (C) and resistor (S) in series. Assuming the voltage across the capacitor is initially 0; what is the equation describing the voltage across the resistor P with respect to time, assuming the switch is closed at time=0? I used Thevenin equivalent and got V(t)=iP*(1-(e^(-t/RC)* (1-S/R))) where R=P+S; but when I build and test the circuit with real components the results do not match the equation I got. The real circuit measurements match my equation only when S=0, otherwise they do not match.