1_OpAmpIdeal_Experiment_6

Electricty and Electronics Laboratory, Foundation Year, Term 2, University of Sussex Operational Amplifiers + RC Filter (High Pass Filter) This circuit illustrates the loading effect on an active filter (op-amp + RC filter). "Loading effect": the effect of adding another device (for example with an internal resistance of 10KΩ) to the current circuit CHANGES the cut-off frequency of the filter. Comparing the output of the following two versions of the circuit demonstrates the "Loading Effect": (i) the one at the top with no load (switch is open) (ii) the one at the bottom with the load RL connected A solution to this problem is to take the filter to the input of the op-amp. For example, check the following link: https://www.multisim.com/content/YbfemUtNwJBqGosvpXZEqF/1_opampideal_experiment_7/