**Slew rate** is defined as the maximum rate of change of the op amp output voltage per unit of time in the closed-loop configuration under large-signal condition. Slew rate indicates how rapidly the op amp output can change in response to change in the input frequency. It is given as

**The Slew rate of an op-amp is fixed**. If the slew rate is

The **ideal value of the slew rate is infinite**. Practically it is a **finite value** and it is due to the following reasons

- saturation of internal stages and
- the finite time constant of internal capacitors

Consider figure 1. V_{i} and V_{o} are respectively the input and output of the op amp. A_{v} is the closed-loop voltage gain.

Therefore, the output voltage

Now,

Therefore,

For producing undistorted op amp output,

must be less than the slew rate i.e.