What is the offset voltage of the op amp?
    Answer: When the two inputs of the op amp are zero, the output has a certain value, that is, the offset voltage Vos. The offset voltage is divided by the noise gain to obtain the input offset voltage, which is equivalent to a voltage source in series with the inverse input of the op amp. Differential voltage is applied to both inputs of the amplifier to produce zero output, and the offset voltage changes with temperature, known as drift. </p> <p> Note the difference between offset voltage and baseline drift.