Oh Thanks! I found it. Regarding BF244C, can't we use another alternative?BFR91A is still in AWR's Library, good news.
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But I couldn't find SPICE model of BF244C.
You have to enter manually SPICE parameters of the Varicap Diode with parasitic elements. You will have to draw a sub-circuit with them.Oh Thanks! I found it. Regarding BF244C, can't we use another alternative?
Also excuse my ignorance but what is exactly V_varicap in the schematic and how do i do it in AWR? I tried the varactor diode but i don't know where do i exactly specify the voltage range and how to control it.
This honestly sounds very complicated to do in the 6 days deadline our professor set with a software we are unfamiliar with. But is there any useful guides on how to manually enter parameters for elements?You have to enter manually SPICE parameters of the Varicap Diode with parasitic elements. You will have to draw a sub-circuit with them.
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I see, thank you very muchFor the Nch JFET look around for all available, maybe it has some like 2N5486
For the Varicap SMV1232 substitution your job requires reading datasheets and matching relevant specs. which in this case is the nominal C at 0V where all diodes have max. C and the nominal C at 12V where C is reduced then the ratio C(0V)/C(12V) = 5.6 with the fixed series C = 2.2 pF in parallel with 22+22pF controls the mean and spread of f by the resonant equation.
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Then you need to learn what how Varicaps work and why better UHF specs and much higher prices $$ occur with GaAs or Gallium Arsenic and for this application maybe not use them.
This gets rather challenging to find exact substitutes but one might be https://www.mouser.ca/datasheet/2/268/mchp_s_a0011532491_1-2275113.pdf the MPV2100 which should be in that Library.
It's easy to put in model numbers, but hard to find parts that match them in stock that don't cost $25. So design is an iterative process for varicap diodes.
If you have 6 days and you do still not know how to enter device parameters manually, forget about this project buddy. It's too complicated for you. I have told you before that this is an oscillator simulation and it's really very troublesome.This honestly sounds very complicated to do in the 6 days deadline our professor set with a software we are unfamiliar with. But is there any useful guides on how to manually enter parameters for elements?
I actually did not see the third screenshot you have inserted, so all what i had was empty fields with no button to add parameters but now i get it. But yes overall its still complicated and its fair to say i am not the only one having troubles with it. All of our class is.If you have 6 days and you do still not know how to enter device parameters manually, forget about this project buddy. It's too complicated for you. I have told you before that this is an oscillator simulation and it's really very troublesome.
Couldn't your professor find a simpler entry level project for you ???
Thank you very much.Usually I don't do people homework, but I agree, there is not much time to learn a program as AWR, especially to add simple components to its #&$@ library.
I attach the simulation done in LTspice, at least you can understand how the circuit is working.
Also I attach the Spice models for JFET, BJT, and Varactor diode used in the simulation. In LTspice they are very easy to add to the library.
For JFET open with LTspice the file C:\Users\"your name"\AppData\Local\LTspice\lib\cmp\standard.jft and insert the model there.
For BJT open with LTspice the file C:\Users\"your name"\AppData\Local\LTspice\lib\cmp\standard.bjt and insert the model there.
For Varicap diode open with LTspice the file C:\Users\"your name"\AppData\Local\LTspice\lib\cmp\standard.dio and insert the model there.
Save each file after inserting the model, and restart LTspice.
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