What are the applications of slew rate?

[sreejith]

what are the applications of slew rate?
what are the important parametrs that are tobe taken into care when designing
complex op-amp ckts..?
please answer.. thx in advance..

 

[konarkk]

Re: slew rate

Slew rate generally consider while u are using op amp for filter design, since it is a freq dependent .

Also a very good application of slew rate is that a single ckt can use as sine , square & even a triangular wave o/p

 

[Kral]

Re: slew rate

sreejith,
The important thing to remember is that gain-bandwidth product is a small signal parameter, while slew rate is amplitude dependent. For example, the slew rate of a sine wave with a 10V peak is 10 times the slew rate of a sine wave of the same frequency with a 1V peak. If you attempt to exceed the slew rate capability of an op-amp, one of the intermediate stages of the op-amp will saturate in an attempt to keep up with the input signal slew rate. During this time, the input specifications of the op-amp (input resistance, offset voltage, etc) will not be met. In addition, it will take a long time for the intermediate stage to come out of saturation, especially if the op-amp has a built in frequency compensation capacitor.
Regards,
Kral

 

[shaikhsarfraz]

Re: slew rate

hi,
slew rate is defined as
dV÷dt, that is rate of change of voltage.

It determines how fast a circuit can charge or discharge the next stage.

thanks
sarfraz

 

[Miguel Gaspar]

slew rate

The slew rate is the capacity of the output stage of the opamp to change de voltage in certain time. Ej 13V/uS
but if the signal need a greater variation, then distorsion occours, not saturation.

There are about 30 parameters, but acourding your application some will be more important than for another application.