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24 Threads found on edaboard.com: Pspice Model Bjt
hello members I want to make my own NMOS and PMOS and NPN and PNP libraries in Orcad 9 so that I can use the schematic editor and build any circuit based on these models and do "neat" step by step schematic entry followed by simulation. For example I have following data for a NMOS and PMOS (taken from page 37 from Razavi) LEVEL 1 SPIC
Hello I need to use certain transistor PC3388, and it has no datasheet on A.D.S, but i have its datasheet.. Can't I write its model for myself? In general, how can I write a pspice model for A.D.S.? Is A.D.S. SPICE based simulator? Or Spectre? Or what? and how can i write my own model? Thanks in advance, Ahmad,
in ads there is a feature called netlist converter , it convert the model to the pspice model , to ADS model, and then include the model in the schematic khouly
in pspice model editor extract parameter options is freeze how to activate that one?
Dear all, I am looking for a help in modelling the transistor 2N2369A throught its SPICE model found in the internet. Basically I need to bias the transistor and see the behavior, but once importing it through Microwave Office (Project->Add netlist->Import netlist->Import file as pspice netlist files (*.CIR)) I noticed that the device (...)
i want to study bandgap reference source.But if i use 0.5um CMOS processing how can i set bjt parameter in HSPICE or pspice?Is there any website just like MOSIS providing BICMOS fabrication parameter for HSPICE or pspice?
Because the bipolar device is not a standard device from foundry , it is a special device from my own . I 'd like to make the spice model so that it can be simulated in Hspice or pspice. I heard IC-CAP can do this job. Any one know where to get a copy of this tool ?
I want to model a real bjt IC Vs Vce Characteristics using student version pspice. I have used a pspice bjt model and tried to model a real bjt using .model parameters but it is not matching the real bjt characterisitcs. (...)
Since pspice does not like open terminals, put a 1G ohm resistor from collector to ground.
Vbdg = Vgo + Vto(γ-×) and Vgo=1.205 , γ=3.2 ,×=1 ×=1 (in your circuit, this parameter is 1, as your VBDG setup PNP is biased by PTAT current) γ=3.2 (look inside pspice model for XTI) Vgo (pspice uses EG, the fictitious Vbe at 0K, not quite measurable in practice) if u have done an almost ideal job on your (...)
the orcad software has models embedded for bjt and cmos also you can define models in pspice or hspice by yourself
Unlike the MOS transistor, I am curious about how to configure this bjt transistor. In the property attribute of this device, area is the parameter set by user. What this area mean? In datasheet, I cannot find it, only the parameter like IS , VAF , BF, etc. is known. How can I custom multi QBreakP instances with the different Is, VAF, BF, and etc&
Unlike the MOS transistor, I am curious about how to configure this bjt transistor. In the property attribute of this device, area is the parameter set by user. What this area mean? In datasheet, I cannot find it, only the parameter like IS , VAF , BF, etc. is known. How can I custom multi QBreakP instances with the different Is, VAF, BF, and etc&#
Hi everyone, I am trying to model an NPN Transistor in pspice using a .model file, but am having trouble converting transistor characteristics into characteristics you enter into the model text file. This is the first time I've tried a .model file and any help would be greatly appreciated. The (...)
hey, what should be the modeling parameters for bjt to make it run in saturation. please help v urgent. thanks
i m new to pspice ,, i have drawn a simple ckt of bjt amp it is not working.. any guidance is appreciable.. thnx in advance
pspice has a number of industry standard optocoupler models in OPTO.lib. It's not obvious however, if this (or any other library) represents all intended parameters, e.g. dynamical behaviour. Before searching for models, you should have an idea which parameters should be modelled. In some cases, it might be more promising to (...)
My semester project is design of low noise amplifier 5-100Mhz with following characteristics Input signal = 70 nano volts (-130.9dBm) output signal = 2.2milli volts (-40dBm) using NEC 2SC2570A bjt transistor. The cable amplifier available in market uses same transistor and input is -65dBm. I have to improve upon it using
Hello clsfox, Instead of importing as pspice netlist... Use the following Gbjt elemet on schematic Elements -> Nonlinear -> bjt -> Gummel-Poon 3-Terminal bjt: Gbjt3 and then enter manually all the parameters (carefull about default units used in the parameter page.... * .model (...)
Can't simulate it by pspice ?
For circuit simulations I use pspice. I have checked the influence of the Miller capacitance as follows. 1.) To be sure that the capacitance between base and collector solely determines the frequency behaviour of a transistor stage I have increased the value of CjC from 7pF to 700 pF (bjt 2N2222). This was possible because pspice allows (...)
Using ADS (Main) goto file import -> Browse to the file -> click more options -> select pspice and other appropriate options -> Hit OK. When the design appears. In the design window goto file design parameters, then you can select a symbol to use and what library the device will appear in. Cheers
Hello Luis, just change this file extension as *.cir (pspice format) & then import it as pspice netlist it works fine.... If still have issues, append the file here... ---manju---
Seems like you are referring to the gummel-poon transistor model? What's your point in reproducing the temperature equations? For hand calculations, I've been satisfied with the well known -1.9 mV/K Vbe temperature dependency since I'm doing electronics. But I noticed, that most literature referencing these equations has a detailed explanation,