You use Nonlinear model of BJT, Gummel-Poon Model.i tried to extract s parameters for bjt bfr96 amplifier
for specific Q point(VCE=10V, IC=50mA) from s parameters simulation in ADS 2017
but it not as same as bfr96 datasheet.
Use S-parameter model not Nonlinear model.i know the S Parameters from vendor datasheet is reliable,
but what about the S parameter simulation???
Does your nonlinear model include package parasitics, or just the bare die?
I do not recommend you to use BFR96 ( if you have really an intention to use it ) because it's obsolete and not manufactured anymore. I suggest you to go Infineon for discrete BJT Transistors and download their Design Kit.They are more consistent..
yes volker whan i put the SPICE MODEL inside BJT_Model(BJTM1) i got a strange S Parameter at the same Q point, at the same time when i simulate defulte BFR96 model i almost got close result.
i attached the BFR96 spice model from NXP.com .
when and how can i use spice model for simulation?
thank you in advance!!!
thank yo Mr BigBoss but it isn't my problem. my problem is what is the suitable model to put inside transistor to get real result (like S parameter for specific Q point) as same as datasheet?i appreciate your help!
thank you so much!!
.MODEL Declaration does not include Extrinsic components.If you would to fit measured s-parameters and model based s-parameters, you have to define additionally these extrinsic elements.
If you have a SPICE file with package parasitics, you can import this file in ADS.ADS will recognize SPICE Model and connect these extrinsic elements to the model.Then you should create/copy a symbol to able to simulate it.
View attachment 151339View attachment 151340View attachment 151341View attachment 151342
thank you so much Mr BigBoss.
i imported spice model netlist for BFG97 transistor but i don't know how i can link and connect with (simulation amplifier circuit) from design guide and netlist spice model for bfg97. is there example or video please!
i'm sorry but i'm beginner in ads simulation...
thank you so muchView attachment 151347
Good.. Now create a symbol from this schematic.(Window-->Create Symbol then copy existing symbol) then call it back from Library into main simulation schematic.
I´m not very experienced with HF...-Your layout is not properly designed..( frankly looks terrible..)
Hi,
I´m not very experienced with HF...
In my eyes - maybe it doesn´t look nice - but it should be way more suitable for HF than a breadboard circuit.
The picture isn´t very detailed, so I can´t follow the signal... but it´s only 40MHz as far as I can see in the schematic.
Aside the esthetics - is it really that bad as testing circuit?
Klaus
yes in picture it looks 40 MHz but i'm tried at 100MHz and 200MHz it's also not consistent.but it´s only 40MHz as far as I can see in the schematic.
really i'm confused if i must put terms 50 ohm in front of source or not, because the tester i used it has 50 ohm inside input wave terminal.Simulation set-up is not correct because he used a Vsin in series a 50 Ohm port element , it's not the same thing with Psin with internal 50Ohm source impedance.
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