Slew rate

In electronics as slew rate, the rising rate, the maximum slew rate or rise and fall rate of the output voltage of an amplifier and driver circuit, in particular an operational amplifier, respectively.

Definition

The slew rate is the maximum slope of the slope of the output voltage when the input receives a square wave signal, the amplifier correctly modulates ( large-signal response):

Where the voltage present at the output time function represents. In data sheets specify the slew rate is specified in volts per microsecond. The connection for the large-signal cut-off frequency of an amplifier is given by the dV / dt derivative. A sinusoidal voltage of the form:

Has the greatest slope at the zero crossing (t = 0)

The required slew rate is thus proportional to the signal amplitude and frequency. That is, an amplifier, a signal having large amplitude may be less accurate than a small signal transmitting. Data sheets of operational amplifiers, therefore, both the slew rate ( large-signal behavior) and the cutoff frequency and the transition frequency be (describe the small-signal behavior) specified.