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Blocker Noise Figure / Reciprocal Mixing Noise test using SpectreRF (MMSIM14)

RFStuff

Dear All,

I want to see/simulate how a close in blocker affects my receiver noise in the presence of LO-phase noise.

I provide a square LO to my receiver Mixer and a Blocker at the receiver input.

May be I have to model the LO phase noise in Verilog-A & then do a Pnoise analysis. ( But beat frequency reduces quite considerably with respect to LO frequency because of close in Blocker )

Can anybody please comment and give suggestion how to do this type of simulation efficiently in SpectreRF  ?


Kind Regards,

Parents

  • Please follow this up through the case you have (I see there has been some recent interaction) - I can't duplicate the work of a colleague who is already working on this and is likely to have more detail than just the information above (it's very hard to give answers to your questions without being able to see more than you've shown).

    In general, passive mixers (particularly if you are using bsim3v3 or bsim4 models) are tricky to simulate accurately - this is a well know phenomenon with various papers in the literature (including one from IBM) which describe the problems with the models that lead to these inaccuracies. It's not the simulator's fault - it's the model not being good in the region that passive mixers operate.

    Regards,

    Andrew.

Reply

  • Please follow this up through the case you have (I see there has been some recent interaction) - I can't duplicate the work of a colleague who is already working on this and is likely to have more detail than just the information above (it's very hard to give answers to your questions without being able to see more than you've shown).

    In general, passive mixers (particularly if you are using bsim3v3 or bsim4 models) are tricky to simulate accurately - this is a well know phenomenon with various papers in the literature (including one from IBM) which describe the problems with the models that lead to these inaccuracies. It's not the simulator's fault - it's the model not being good in the region that passive mixers operate.

    Regards,

    Andrew.

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