# Differential equation solving circuit didn't result the right solution

According to calculations, this circuit should have solved the differential equation 25y''+ 5y' + y= (15,5)x

So when I give x= 0,1 V, y should be 1,55.But it becomes -10V. Why?

For the ltspice file

• Circuits don't solve equations. Circuit behavior can be described by an equation. There's an error in the circuit, the output of U3 is shorted to the +10V supply rail. – Bimpelrekkie Dec 8 '17 at 7:55
• @Bimpelrekkie dummies.com/education/science/science-electronics/… – pipe Dec 8 '17 at 7:57
• @pipe OK, I see, sort of like an analog computer. – Bimpelrekkie Dec 8 '17 at 8:03

• The final value may be 1.55, but the transient should be a decaying oscillation with $\zeta=0.5$ – Chu Dec 8 '17 at 13:01