PMOS netlist model Virtuoso syntax

You can't do this (I'm not sure why you would want to either, since spectre is normally used for IC design, and this is presumably a discrete component?).

The issue is that VDMOS is a proprietary model in LTSPICE and not available in other simulators (so it's not recognised in Spectre). See http://ltwiki.org/LTspiceHelp/LTspiceHelp/MOSFET_Model.htm

Andrew.

Hello Andrew, i am trying to use this specific model  in cadence to use it as oscillators that i implemented before in gpdk or umc90nm

Bellow you can see that i interpreting each parameter from the model for its meaning.
Where can i find a MOSFET netlist syntax that would be the best fit for this model which cadence virtuoso would accept?

Thanks

I don't really see why you'd use a model from a completely different technology in another process. You're not going to be able to implement it (although gpdk is a fake process anyway, you might as well use a transistor from that process rather than inventing another one).

You might be able to use mos1, mos2 or mos3 (see "spectre -h mos1") but this doesn't support the same parameters.

However, this seems to me an utterly pointless exercise. I can't tell you how to adapt a proprietary model into an equivalent model - if you really wanted it to match, you'd have to re-characterise it. But doing this seems bizarre to me as unless this corresponds to something that is consistent with the process you're using, it's a waste of time.

Unless I'm missing something...

Andrew.

I don't really see why you'd use a model from a completely different technology in another process. You're not going to be able to implement it (although gpdk is a fake process anyway, you might as well use a transistor from that process rather than inventing another one).

You might be able to use mos1, mos2 or mos3 (see "spectre -h mos1") but this doesn't support the same parameters.

However, this seems to me an utterly pointless exercise. I can't tell you how to adapt a proprietary model into an equivalent model - if you really wanted it to match, you'd have to re-characterise it. But doing this seems bizarre to me as unless this corresponds to something that is consistent with the process you're using, it's a waste of time.

Unless I'm missing something...

Andrew.

Hello Andrew , so you are saying that this netlist model doesnt fit for being used in buillding an oscilator .

How can i recognise that a mosfet model that if front of me could be used for such purposes?

Thanks

Put simply, if you're trying to create a design on a particular technology - be it a real process such as UMC90nm or an artificial process intended for demonstration such as gpdk090 or gpdk045 - then it doesn't make sense to introduce transistors into your design which are not representative of devices that would exist in that technology. Given the name of the model and a bit of googling, this appears to be a discrete p-channel power MOSFET device, so I'm not sure what value there would be in using that model as part of an IC design - it's utterly meaningless. 

Now there might be a situation where you were driving a signal off-chip to connect to this off-chip transistor, but that doesn't appear to be what you're asking for here. If you were, I would ask the transistor vendor for an alternative model (e.g. a PSPICE model) which could be used in spectre. However, I don't think that's what you're doing here - I'm guessing you've found some oscillator design using this particular transistor (which would seem a rather strange use of a power MOSFET, to be honest) and are trying to re-use it in your design?

Anyway, people design oscillators (with all sorts of different architectures and types) on IC processes all the time - so there's no need to have a special type of transistor to design an oscillator.

I would suggest you speak to your supervisor - hopefully they can give you some practical guidance of doing real-life IC design.

Kind Regards,

Andrew.

Thank you very much