When the integrated operational amplifier is used in mathematical operation, what region must the operational amplifier work in? If the output voltage of an operational amplifier is very close to its supply voltage, the operational amplifier actually When integrated operational amplifier is used in mathematical operation, it must work in linear region. In other words, the circuit with the operational amplifier as the core must be negative feedback, and the operational amplifier cannot be saturated.

When the output voltage of the operational amplifier is very close to its power supply voltage, it shows that the operational amplifier is likely to have a saturated output, which may be wrong from the perspective of mathematical operation.