Test Pattern Generator Design

[rafgamo]

I am very new to these topics and i need to design a test pattern generator. Can anyone help me on where to start? What topics should I read? And are TPGs analog or digital? or maybe both?

I would really appreciate the help. Thank you!

 

[tadeoman]

Silly question, do you mean a physical TPG or for simulation?

 

[rafgamo]

I'm really sorry for the silly question. I will be using the TPG for simulation.

 

[tadeoman]

LOL. I never meant to say that your question was silly. I meant that MY question to you was silly. Excuse me if I sounded rude.

You can use Verilog to drive spice or Verilog to drive Verilog. I would read this thread for example:

https://www.asic-world.com/verilog/art_testbench_writing2.html

or this:
https://people.ece.cornell.edu/land/courses/ece5760/Verilog/LatticeTestbenchPrimer.pdf

I hope this helps

 

[rafgamo]

You didn't really sound rude. I just thought that my question was silly. I really know very little about this topic. Thanks For the help.

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Are physical TPGs those that are used in BISTs?

 

[ads-ee]

Many physical TPGs in a BIST use things like an LFSR as they are simple and easily implemented and will run at very high clock rates. For the most part they give reasonable PRBS for self testing and built in pattern data generation for say loop back packet processing.

 

[rafgamo]

Where do i start when i design physical TPGs?

 

[tadeoman]

AFAIK, BIST can use digital structures such as ads-ee mentioned, LFSR. Some of them also use physical parameters to create PRBS such as PUFS (https://en.wikipedia.org/wiki/Physical_unclonable_function)

I was looking (and thinking on taking) this course form Udacity on hardware verification:
**broken link removed**

They show a few techniques such as "directed" random testing and maximum coverage of tests and so on.

 

[mdyusuf]

Actually, there is no free online pattern generator in the internet world this is true, I'm sorry to say that. But if you really need design pattern I refer go the google and search clipping path, you have seen lots of company, but India, a company is the best for design pattern and clipping path job.