Registered Sleep Technologist Practice Exam

The output voltage in such cases is calculated based on the principle of summation of signals. When both G1 and G2 are equal and each has a value of -25 μV, you add these two voltages together.

In this instance, the addition of G1 and G2 would be:

-25 μV + (-25 μV) = -50 μV.

It's important to note that -50 μV translates to -0.050 mV when converted to millivolts. However, the context of the output voltage being 0 mV refers to a situation where differential inputs result in no net output; if two identical inputs are perfectly balanced, any signal can effectively cancel out.

This means that if considering a scenario where these values are being measured relative to a baseline, the output manifests as 0 mV because there is no difference in the voltage being observed. Thus, the correct representation of the output voltage given two equal and opposite values leading to no net effect on the circuit is indeed 0 mV.