All Questions
37
questions
0
votes
1
answer
66
views
LTspice sofware Zener diode model 3bdc missing [closed]
I cannot find any models for LTspice for Zener diode breakdown voltage of 3 V. I need Zener diode because I am trying to get simple voltage stabilizer and my load cannot handle more than 3 V. I cannot ...
- 45
0
votes
1
answer
70
views
LTSpice Unknown SPICE device type "N" [closed]
I try to use the model for the BFR106 transistor in LTSpice, which I got from here
https://www.infineon.com/cms/en/product/rf/rf-transistor/high-linearity-rf-transistors/bfr106/?tab=~%...
2
votes
1
answer
151
views
LTspice model file for new component
I would like to add some new components to the LTspice library. I have never done this before.
The online SPICE forum discusses 3rd party component steps. It says I have to download the SPICE model ...
- 129
2
votes
1
answer
248
views
How can I add an LM567 in LTspice? [duplicate]
From searching the web it seems it is not included with the installation of LTspice, so I will have to add it as a 3rd-party model.
I am fairly new to LTspice and I'm not sure how to do this as I ...
- 157
0
votes
3
answers
107
views
Characteristic of a Resistor/Diode Simple Circuit in LTSpice
Our teacher in class instructed us to experiment with a resistor/diode circuit in LTspice. The goal is to display the I-V characteristic of the resistor, as well as that of the diode, and test them ...
- 339
1
vote
0
answers
69
views
Flyback Average Model
I wanted to try the PWM switch model to make a bode plot from the transfer function of the flyback with fixed duty cycle in LTspice.
I had already a working transient model which give me the correct ...
- 31
1
vote
1
answer
224
views
LTSpice library Voltage Controlled Switch SW returns error: Unknown parameter "sw". Why?
I'm having problems with the LTSpice Voltage controlled switch in a very simple circuit:
A pulsed voltage source is used to switch MYSW on and off: PULSE(0 5 15m 1n 1n 0.15m 16m 1) .
The voltage ...
- 11
1
vote
1
answer
104
views
Simulation model problem
Recently I have downloaded a model from Toshiba's web site and tried to create a simple circuit like in the image below.
The signal on the "V(n002)" point wasn't like I expect. After that, ...
- 76
3
votes
0
answers
520
views
How do I find or calculate BJT parameters for LTspice?
A typical entry line in LTspice's Standard.bjt file contains, e.g.,
.model 2N4126 PNP(Is=1.41f Xti=3 Eg=1.11 Vaf=18.7 Bf=203.7 Ne=1.5 Ise=0 Ikf=80m Xtb=1.5 Br=4.924 Nc=2 Isc=0 Ikr=0 Rc=2.5 Cjc=9.728p ...
- 133
0
votes
1
answer
284
views
How do I import this OPA313 PSpice model into LTspice?
It's been asked quite a few times how to import PSpice models into LTspice but none of the methods seem to apply to this particular model from TI. I really don't understand what all these files are ...
- 1,012
0
votes
0
answers
125
views
How to understand SUBCKT LTSPICE in order to modify an existing IGBT model to another from the same company
I am struggling trying to understand how a IGBT IKW15N120BH6 is implemented through a SUBCKT. The text file includes SUBCKT with functions and parameters, but it is not a typical construction of a ...
3
votes
1
answer
4k
views
Optocoupler Ltspice model
How are the Ltspice library optocouplers modeled? E.g. PC817 has this one:
...
- 877
3
votes
1
answer
320
views
NMOS level 8 Ltspice model of 2SK4177
After downloading a model from https://www.onsemi.com/design/resources/technical-documentation?rpn=2SK4177, I deleted everything apart from what was between .MODEL and ), so I ended up with a xxx.txt ...
- 877
1
vote
1
answer
682
views
LTspice create a model with <InstName> attribute as a variable
Don't know if my title was correctly put. Here is what I want.
I am creating a new module. Each time I add new module I get on top of the module X1, ...
- 145
6
votes
1
answer
5k
views
LTspice: Modeling an LED
I'm trying to create a spice model for a Vishay VSLY5940 IR LED (datasheet) and after following a few examples I found online, I'm unable to complete my calculations.
I created a graph in Excel that ...
- 155