Circuit Theory/1Initial and Source/Example30/code

Vo=20; R1 = 6000; R2 = 2000; R3 = 10.01; C2 = .00047; Vc2 = Vo*R2/(R1 + R2); Req = R2*R3/(R2+R3); tau = Req*C2; syms time A C; Vc2t = A * exp(-time/tau) + C; eq1 = Vc2 - A - C eq2 = - C2*diff(Vc2t,time) - Vc2t/Req; time = 0; eq3 = subs(eq2); vpa(eq3,3) S = solve(eq1,eq3,A,C); S = [S.A S.C]; A = S(1); C = S(2); vpa(A,3) vpa(C,3) syms t; eq4 = (A * exp(-t/tau) + C)/Req; vpa(eq4,3) vpa(tau,3) vpa(Vc2,3) vpa(Vc2/Req,3)