PSS simulation for RF LO and mixer simultaneously

And from the MMSIM13.1 SpectreRF User Guide:

Semi-autonomous is provided to allow the simulation of circuits that have periodic sources and oscillators in the same circuit. It is only supported in the hb Choosing Analyses form. Typical applications are for when you have a receiver with an RF tone and an oscillator for the LO so that all the oscillator noise is taken into account for the receiver noise simulation. Another application is for identifying the phase noise and spurious response of an oscillator when power supply ripple is applied.

The simulator combines the driven and oscillator capability in one analysis. To set it up is similar to a multi-tone simulation, just select the Oscillator check box and specify the estimate of the oscillator frequency in the osc! section of the form. The probe-based method for oscillators is not available for semi-autonomous simulations.

best regards,

Tawna

And from the MMSIM13.1 SpectreRF User Guide:

Semi-autonomous is provided to allow the simulation of circuits that have periodic sources and oscillators in the same circuit. It is only supported in the hb Choosing Analyses form. Typical applications are for when you have a receiver with an RF tone and an oscillator for the LO so that all the oscillator noise is taken into account for the receiver noise simulation. Another application is for identifying the phase noise and spurious response of an oscillator when power supply ripple is applied.

The simulator combines the driven and oscillator capability in one analysis. To set it up is similar to a multi-tone simulation, just select the Oscillator check box and specify the estimate of the oscillator frequency in the osc! section of the form. The probe-based method for oscillators is not available for semi-autonomous simulations.

best regards,

Tawna

Hi Tawna, 

I have been reviewing the forums on cadence website. They have been highly helpful. Thanks to you and your team. 

I have a question about phase noise simulation at the output of the oscillator in this co-simulation setup. Should we choose hbnoise to perform the simulation? Do you have a suggested setup for hbnoise gui? Settings like sweeptype and noise type in hbnoise gui?

Thanks.

Rouzbeh

Rouzbeh,

First of all, please read the Guidelines for the RF Design Forum which ask you:

1. Not to post in very old threads (such as this one - which is 4 years old)
2. To ask a clear question (your question is so open-ended, and nobody could advise you how to set up the simulation without more details of the design in question)
3. Reference which tool versions you're using (both IC and spectre versions - because the answer will most likely depend on whether you're using an old version or something newer given so major usability and algorithm improvements in the pnoise/hbnoise analyses a little while back)

You also mention co-simulation; there's no co-simulaton going on. It's hard to know if you have just an oscillator, or a driven signal and an oscillator, what kind of circuit you're using and so on. Too many unknowns. 

So please post a new question with all the details. In the meantime you might want to take a look at <MMSIMinstDir>/tools/spectre/examples/SpectreRF_workshop/rfworkshop.tar.Z - this is a tutorial database which shows you how to do many things in SpectreRF. Simply find an empty directory and then use:

tar xvfz rfworkshop.tar.Z

to unpack it. There's a workshop library and a doc directory with workshops on mixers, PAs, LNAs and oscillators (amongst other things) - you can use that to get a better understanding of how to use SpectreRF to analyse different types of circuit.

Regards,

Andrew