1. The problem statement, all variables and given/known data Trying to come up with an equation of V_D in terms [tex]R_S, R_d, R_D, V_i, G[/tex] G is a constant 2. Relevant equations Sum of voltages around a loop = 0 Sum of currents at a node = 0 Voltage divider Current divider Resistance of resistors in parallel 3. The attempt at a solution [tex] V_i = V_D [/tex] I'm not exactly sure but if you probe with your voltmeter from the ground to the upper side of V_D and then do the same at the top of the current source. Wouldn't those be the only two components in a loop?