Hi I am struggling to understand what slew rate is, please could somebody write a basic definition?

'Slew' rate is the rate or the speed with which something changes from one state to another state over a period of time. That's it.

 

The higher the index, the more details of the signal component reduction ability, otherwise you will lose some resolving power.
Op-amp conversion rate is defined as, operational conditions, the closed loop will be a large signal (including step signal) input to the input end of the op-amp, measured from the output of the op-amp increased rate of the output of the op-amp.