In the following circuit the output $$'V'$$ follows an equation of the form
$${{{d^2}V} \over {d{t^2}}} + a.{{dV} \over {dt}} + bV = f\left( t \right).$$
Find $$a,b$$ and $$f(t)$$

The Circuit shown in figure is excited by the input wave form shown. Sketch the wave form of the output. Assume all the components are ideal

With the ideal operational amplifiers, the circuit in figure simulates the equation