I am dealing with both type of amplifiers 1. Integrator (chrage sensetive amplifier) and 2. Transimpedance amplifier (current sensative). Ideal case of these two amplifiers are completely different. Integrator has feedback capacitance and TI has feedback resistance. But in practice, a feedback resistor is added in parallel to capacitor in integrator to reset the integrator and a feedback capacitor is added in parallel to resistor to stablize the TI. Now, both circuit are identical. The problem is, since the circuit is now an integrator, how does the output voltage remain proportional to input current in case of TI?