Here is another problem. A power supply CANNOT independently control both current and voltage. Given any particular load you can control the current OR the voltage but not both. A consequence of this is that you cannot force a load to take more current than it requires. So you are monitoring control pins, and why exactly do you expect noise that you wish to filter out on these control pins?Please can you see post #17.
1) It is not output, we are monitoring from the control pins of the SMPS. The max voltage is 6V.
2) By using the Amplifier, ADC and Micro controller.
3) This is project to design such a circuit to monitor the voltage and current of SMPS. it is not a output voltage.
4) If I learn that how to design the circuit to monitor the parameters of SMPS, may be there after my professor had a plan to give another assignment to control the output of voltage and current of the SMPS through these control pins as described in post #17.