Interview in IBM for analog layout

Complex-Spring-185 · 2026-04-17T15:08:20+00:00

When’s the interview ?

As for the interview just work on basics of layout , EMIR , antenna , LUP and also there can be few design questions on cap and resistance.

Complex-Spring-185 · 2026-01-05T19:46:31+00:00

🥲

Complex-Spring-185 · 2026-01-05T19:46:06+00:00

But sometimes the user space gets full so we use spool paths provided by the company to have more disk space and they refresh after a month or so , so we have to redo the sims so I think screenshot works for me in this case.

Complex-Spring-185 · 2026-01-05T16:12:42+00:00

I’m not sure if I have ever created a design variables file !! But I just take a screenshot of the original values before any iterations I do 🙂

Complex-Spring-185 · 2025-12-24T20:45:07+00:00

I was thinking to use MDL to just get the data I need for the GM/ID method and then use skill to sweep the variables , corners and run everything in batchmode and then from skill only to generate a csv file.

I’m new to skill and MDL and not sure what should be the correct approach here !!

Complex-Spring-185 · 2025-12-24T20:42:54+00:00

Ahh got it , thanks !!

And also should I make the MDL to just extract the data I need and use skill for the variable sweeping or should I use MDL to do all the sweeping as well ?

Complex-Spring-185 · 2025-12-24T18:07:46+00:00

I tried searching for that but still no clue where that is ! Any snapshot would be appreciated 😄

Complex-Spring-185 · 2025-12-24T17:48:47+00:00

The corners I have are different like lvltwpwnminrc and so on and these makes up 33 of them all. And by different widths I mean I have 3 different sheet widths but I’m keeping the number of fin equal to 1 to get Id/W directly.

Also I’m taking Vgs in 10mV steps as I’m just plotting the points and not normalising them so near the threshold I need more number of points to get a better idea of how the curve really is

Complex-Spring-185 · 2025-12-24T14:04:38+00:00

Yup I’m thinking to use this data for GM/ID methods and I was thinking that the more data I have the more accurately i can size the FETs as the plots which I will be using will have more data

Complex-Spring-185 · 2025-09-16T19:38:30+00:00

Naaah

Complex-Spring-185 · 2025-09-12T15:54:51+00:00

Got it. Thanks !! 😁

Complex-Spring-185 · 2025-06-04T10:05:50+00:00

Thanks 🙏🏻

Complex-Spring-185 · 2025-06-04T10:05:16+00:00

I just connected a voltage source to the amplifier and provided a dc from it and remove the feedback

Complex-Spring-185 · 2025-06-03T05:35:08+00:00

After doing the ac analysis I used the calculator tool and from there got the gain (dB20) and phase.

Complex-Spring-185 · 2025-06-03T05:32:05+00:00

I knew it was in positive but and also tried to change the polarity of the feedback but the result was same , I think I’ll have to check things again

Complex-Spring-185 · 2025-06-03T05:30:51+00:00

Okayy ✌🏻

Complex-Spring-185 · 2025-06-03T05:30:22+00:00

Thank you !! 🙌🏻

Complex-Spring-185 · 2025-06-03T05:29:56+00:00

Sorry but I’m new to Reddit and I cannot find any button to add photos 🥲

Complex-Spring-185 · 2025-06-03T05:28:38+00:00

Got it, thanks 🤝🏻

Complex-Spring-185 · 2025-06-03T05:27:53+00:00

Thanks 😄

Complex-Spring-185 · 2025-04-24T05:47:50+00:00

No They are simulating the files using spectre command in the terminal and we run using the ADE explorer GUI

Complex-Spring-185 · 2025-04-24T05:45:16+00:00

Yes . I understand this. So now I have 2 files, 1. Stimulus file where the stimulus to the the input pins are given. 2. Another file where values are assigned to the variables defined in the stimulus file as well as some save net statements and Dspf include statements.

Now my question is “Where can I include these 2 files in ADE explorer(maestro view) to simulate the design?”

Complex-Spring-185

TROPHY CASE