FIGURE 4.1 below shows two identical signals on the input terminals of an op amp - NSC Electrical Technology Digital - Question 4 - 2023 - Paper 1

Infinite bandwidth refers to the operational amplifier's capability to amplify signals across a limitless range of frequencies without loss of gain or performance. This means the amplifier can handle various signal frequencies without distortion.

The voltage gain (AV) for a non-inverting amplifier is calculated using the formula:

$A_V = 1 + \frac{R_F}{R_I}$

Substituting the given values:

$A_V = 1 + \frac{47 \times 10^3}{10 \times 10^3} = 1 + 4.7 = 5.7$

Using the previously calculated voltage gain:

$V_{OUT} = A_V \times V_{IN}$

Substituting the values:

$V_{OUT} = 5.7 \times 100 \times 10^{-3} = 0.57 V = 570 mV$