I plan to build an analog circuit to solve diff eq of the form x''+bx'+cx=f(t), where b and c are positive.

1. Ignoring the value for each component and focus on the whole connection. Is the circuit actually correct? Since I've used a few inverted integrator and inverted summers, I'm not really sure if the circuit is doing what I want to do, and if the sign for the coefficients b and c are correct.

2. What frequency range and values for the resistors and capacitors should I use? I heard that if the frequency is too low, the input current offset will make the output voltage drift to the rail of the op-amp, is it true? (actually I don't really know what this means). And I should keep the product of R and C equal to one, don't I?

thanks

1. Ignoring the value for each component and focus on the whole connection. Is the circuit actually correct? Since I've used a few inverted integrator and inverted summers, I'm not really sure if the circuit is doing what I want to do, and if the sign for the coefficients b and c are correct.

2. What frequency range and values for the resistors and capacitors should I use? I heard that if the frequency is too low, the input current offset will make the output voltage drift to the rail of the op-amp, is it true? (actually I don't really know what this means). And I should keep the product of R and C equal to one, don't I?

thanks