In order to be able to minimize the effects of changes occurring in the electrode impedances, it is necessary to employ a preamplifier having a high input impedance.

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A preamplifier with high input impedance is necessary to minimize the effects of changes in electrode impedances because it ensures that the signal is not significantly affected by variations in the connection between the electrode and the signal source. High input impedance reduces the loading effect on the signal, maintaining signal integrity.

In Order to Be Able to Minimize the Effects of Changes