I'm supposed to calculate the voltage drop (Ux). Where R=R=R=1kΩ, C=1µF, I=1mA, E= 2sin(ωt+pi/2), ω = 10^3 rad/s.
I know I have to use superposition method, but I dont know how to calculate impedance in both situations.
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Where is the top resistor connected to? It seems to float. If it is not connected at the other side, it has no function in this diagram.
Superpositioning seems definitely right.
1st part: - Treat the DC current source as open circuit and calculate the AC impedance of the capacitor. Then calculate the voltage on X2.
2nd part: - Treat the AC voltage source as shortcut and the capacitor as an open circuit. Then calculate the potential of the node between R1 and R3
Add both two voltages and you should have an answer.