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How to model a Transistor in MATHCad?

SachinAttri
4-Participant

How to model a Transistor in MATHCad?

Hi All. I m trying to model a circuit which is basically a CE amplifier.

 

I m not sure how to start. Can anyone please help?

1 ACCEPTED SOLUTION

Accepted Solutions
LucMeekes
23-Emerald II
(To:SachinAttri)

How accurate do you want to model the transistor?

For what purpose do you want to model: Large signal or small signal (AC)?

 

Success!
Luc

View solution in original post

16 REPLIES 16

Hi,

sawtooth.jpg

LucMeekes
23-Emerald II
(To:SachinAttri)

How accurate do you want to model the transistor?

For what purpose do you want to model: Large signal or small signal (AC)?

 

Success!
Luc

SachinAttri
4-Participant
(To:LucMeekes)

As accurate as a Practical model. I want to perform worst case analysis as well using this model..

LucMeekes
23-Emerald II
(To:SachinAttri)

What do you think is a 'Practical' model?

In order to model you must have a circuit, know parameters of the components in the circuit. Do you have those?

What kind of worst-case scenario's do you want to investigate...component tolerances, environmental conditions, EMI situations?

But most importantly: why use Mathcad, and not an electronic circuit simulation application (e.g. LTspice)?

 

Success!
Luc

 

SachinAttri
4-Participant
(To:LucMeekes)

I have been using LT Spice to do so. but recently I went to one Automotive organisation and they are looking someone to report Worst Case analysis in MathCad. They have been using it for years. If I'm not wrong, then they use the H parameters and datasheet to do so. I need one good simple example/tutorial to move ahead.


@SachinAttri wrote:

I have been using LT Spice to do so. but recently I went to one Automotive organisation and they are looking someone to report Worst Case analysis in MathCad. They have been using it for years. If I'm not wrong, then they use the H parameters and datasheet to do so. I need one good simple example/tutorial to move ahead.


Seems to me that asking them for, "An example of what they would like to see."  is a reasonable request that will give you exactly what you want.

you are a very reasonable Person.

I did the same after you suggested.

But the concerned person refused to provide quoting the favorite term "Confidentiality".

 

Thank you so much for trying.

I need a demo from them.  I will try some other way and I will upload the file if I get one.

SachinAttri
4-Participant
(To:LucMeekes)

First , please accept my apology for late reply.

 

I use LTspice for SWCA but some organizations require a documented report. I know the excel way but MathCad seems far superior when it comes to provide reports.

SachinAttri
4-Participant
(To:LucMeekes)

Sir, to perform Stress and worst case analysis on a Component level.

Maybe something like the attached? There're P4 so I hope you can open them.

 

Norm

SachinAttri
4-Participant
(To:nas0k)

so sorry. i could not open.

Can you please help me with this

Please, you should specify to whom of the community you refer.

SachinAttri
4-Participant
(To:-MFra-)

sorry

Answer to:

answer 13.jpg

please, what do you want?

this is one of the correct answer. Thank You So much. I could open these files.

This is relevant to the question asked by me(another ID).

 

Thank you So much. I totally get it now.

 

Regards,

Sachin Attri

Hi,

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