TLDR
The voltage follower circuit of the op amp, as shown in Figure 1, uses virtual short and virtual break. It follows the voltage difference between the two inputs and the output voltage. This is because it is assumed that Vin suddenly increases,still has no response and is greater than 0, so multiply the open-loop gain of the. op amp., so that the output of the. op amp. begins to increase in the direction of the positive voltage. When Vin increases from. increases from will also increase in. direction of positive voltage, and then when Vin increases. The circuit below has a “virtual break”via the TL;DR App
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