If both G1 and G2 receive an input of 50 μV, what is the expected output signal?

To understand why the expected output signal is 0 when both G1 and G2 receive an input of 50 μV, it is essential to consider the configuration of the signals and how they interact with each other.

Assuming G1 and G2 are configured in such a way that they are designed to subtract or cancel out identical inputs, when they both receive the same input signal of 50 μV, their outputs would effectively balance out. For example, if G1 outputs a positive signal in relation to its input and G2 does the same but in an opposing manner, the result would lead to a scenario where the effects of G1 and G2 negate each other.

In cases like these, if both inputs are equal and the influence of each channel is designed to oppose the other, the net output will be zero. This principle is commonly seen in differential amplifiers or similar signal processing setups where signal subtraction plays a crucial role.

Consequently, given both G1 and G2 have the same input, the expected output is 0, as both channels contribute equally but oppositely to the resultant signal.