Slew rate
In the electronics is as slew rate , the rising rate, slope or the maximum rise or fall speed of the output voltage of an amplifier or driver circuit , especially a operational amplifier , respectively.
definition
The slew rate is the maximum steepness of the edge of the output voltage if there is a square-wave signal at the input that completely modulates the amplifier (large-signal response):
In data sheets , the slew rate is given in volts per microsecond . The relationship to the large-signal limit frequency of an amplifier is given by the derivative d U / d t . A sinusoidal voltage :
has the greatest slope at the zero crossing :
The slew rate required is therefore proportional to the signal amplitude and frequency . That is, an amplifier may transmit a large amplitude signal less correctly than a small signal. In data sheets for operational amplifiers, both the slew rate (see also large-signal behavior ) and the limit or transit frequency (describes the small-signal behavior ) are therefore specified.