lteminstep parameter doesn't work on envlp analysis

This documentation is for the periodic steady state (pss)  analysis. You appear to be adding it for envlp, and the documentation you are referring to is not for the envelope analysis. The envlp analysis does not support this lteminstep parameter. If this is (as you say) in the envlp analysis, where about is it? I can't locate it... it's quite possible there's a mistake somewhere, but I didn't see it when I searched.

Oh, hang on, I just found it. It's in the "Spectre Circuit Simulator and Accelerated Parallel Simulator RF Analysis in ADE Explorer User Guide", Chapter 7 "Envelope (ENVLP) Analysis". It appears to have been cut and pasted from the other chapter, but if you look at "spectre -h envlp" you'll see there's no such parameter.

I'll report this to tech pubs. I rather doubt that it's the way to speed up your envlp analysis though - perhaps you should contact customer support?

Andrew

This documentation is for the periodic steady state (pss)  analysis. You appear to be adding it for envlp, and the documentation you are referring to is not for the envelope analysis. The envlp analysis does not support this lteminstep parameter. If this is (as you say) in the envlp analysis, where about is it? I can't locate it... it's quite possible there's a mistake somewhere, but I didn't see it when I searched.

Oh, hang on, I just found it. It's in the "Spectre Circuit Simulator and Accelerated Parallel Simulator RF Analysis in ADE Explorer User Guide", Chapter 7 "Envelope (ENVLP) Analysis". It appears to have been cut and pasted from the other chapter, but if you look at "spectre -h envlp" you'll see there's no such parameter.

I'll report this to tech pubs. I rather doubt that it's the way to speed up your envlp analysis though - perhaps you should contact customer support?

Andrew

Thanks for the answer. Do you know if there is a way to do some of the following settings on the envelope analysis:

1. increase the reltol of only a specific block on the TB
   2. Calculate only "pointlocal" accuracy on a specific block on the TB (assuming the rest will use alllocal setting).
   3. Change the accuracy (reltol or pointlocal) after a specific time

1. You can do this with the options statement: myOpts options reltol=1e-4 subckt=blockName (or adding "reltol=1e-4 subckt=blockName" in the additional parameters field on the misc tab of Simulation->Options->Analog. It can also (I think, from memory) be set in the MTS options
2. I don't believe this is possible, because there is no scoped option to control relref.
3. envlp does not support dynamic parameters, so this is not possible.

Andrew

Thanks for the fast answer. If I want to increase for two or more blocks, Should I use the following:

"reltol=1e-4 subckt=blockName1 reltol=1e-4 subckt=blockName2 reltol=1e-4 subckt=blockName3"

?

Yes, that should work (I didn't check to make sure, but I believe it should).

Andrew