1. The problem statement, all variables and given/known data I have got this circuit: I have to find coefficients k1 and k2, and time constants T1 and T2. Actually, we can see that T1 =R1*C1 and T2=R2*C2, but is it possible in this circuit or it's just theoretically time constants? I'm not sure, but as there is no amplifier in that circuit, capacitors interacts between each other, that's why solution of time constants not so "clear" as we would like to have. Or is it absolutely wrong? Bode plot, using transfer function H(s), which I calculated before: http://www.bildites.lv/images/c54l1249hb71uqesw4mj.png 2. Relevant equations 3. The attempt at a solution This is how I found transfer function: But I guess, circuit suggests, there are series of two ''inertial differential sections''. Then theoretically: When I compare these transfer functions: I'm quite sure, that my first transfer function H(s) should be correct. Maybe second one is more theoretical? Where am I wrong with my solution?