How to model PLL Fractional N Syntesizer

[saw86]

Hello Everyone I try to model Fractional n pll with AWR Microwave Office my uestion is how can I model fractional n PLL synthesizer with AWR Schematic section not VSS ANyone know please help me

thanks in advance

 

[volker@muehlhaus]

how can I model fractional n PLL synthesizer with AWR Schematic section not VSS

You really want to model it at transistor level (MWO circuit simulation) instead of block level (VSS system simulation)?

 

[saw86]

not really I just want to model analog device's PLL in schematic section. I have s parameter result of it and is there any block define p1dB phase noise loop filter ,phase detector, frequency divider...I am just thinking it's possible or not

Mr. Muehlhaus

 

[volker@muehlhaus]

is there any block define p1dB phase noise loop filter ,phase detector, frequency divider...I am just thinking it's possible or not

These elements are in the "system blocks" palette, so I think you will need the VSS license to use them.

 

[saw86]

Ok thnaks for the info MR. Muehlhaus I will check on that

 

[BigBoss]

I recommend you to simulate your Fractional Synthesizer in Matlab Simulink.There are tons of scripts and modelling block in it..

 

[saw86]

Ok Bigboss I think I must try to figure out how to import matlab script into the awr mwo schematic

Thanks bigboss for the info

 

[BigBoss]

Ok Bigboss I think I must try to figure out how to import matlab script into the awr mwo schematic

Thanks bigboss for the info

You don't have to use MW Office ( of course you can use but not necessary )
You should "MatLab Simulink" to predict the characteristics of a Fractional PLL.Simulink is a Matlab tool and it's designed for system/behavioural/general purpose system simulations.
VSS has also very fine simulation design guide for PLLs, it's of course also used..