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OpAmp said:Hi,
Measuring the slew rate in Cadence is similar to measuring it in other simulator. Close the feedback loop of the op-amp and apply a large step voltage to the input of the op amp, and measure the initial slope of the output.
There is not a close relation between slew rate and settling time of an op-amp. Some you can increase the slew rate of an op amp using a nonlinear circuit wile the circuit doesn’t have any effect on the settling time.
Following IEEE papers are helpful to read:
“Relationship between frequency response and settling time of operational amplifiers”
Kamath, BYT; Meyer, RG; Gray, PR.
IEEE JSSC’74
"Analysis of the settling behavior of an operational amplifier"
Chuang, C.T.;
IEEE JSSC’82
Settling time is electrical parameter of opa under small signal, but the slew rate is electrical parameter of opa under large signal. I think they both have no relation.What is the relation of slew rate and settling time.