I have been looking for a way to help my colleagues understand FFE/DFE and how they operate. Your tutorials are excellent, clear with very helpful visuals and examples of real device issues. Thank you for this entire series, sir.
@circuitimage2 ай бұрын
Hi Andy, You're very welcome. Nice to meet you. I'm glad that's helpful. 😊
@jianggu-ml3kx5 ай бұрын
I am a pll designer for ten years, and I want to learn serdes design. Your description is very clear and easy to understand. Very helpful. Thanks
@circuitimage5 ай бұрын
Hi Jiang, nice to meet you and I'm glad that helped you. 😀
@rushikeshnavghare33735 ай бұрын
Very detailed and on point explanation. Thank you.
@suryanarayanpanda361015 күн бұрын
Great.....can you please explain a bit more on how you choose the coefficient values of Pre and Post cursor taps. And 2nd doubt is can we see any case where you keep both the coefficient to be positive and in that case if the transition parts will have higher swing or lower ?
@circuitimage15 күн бұрын
Hi Surya, Thank you so much for the good questions. I have comments below. Great.....can you please explain a bit more on how you choose the coefficient values of Pre and Post cursor taps. [CC] I did the a single-pulse response to figure out the coefficients of Pre and Post cursor, respectively. And 2nd doubt is can we see any case where you keep both the coefficient to be positive and in that case if the transition parts will have higher swing or lower ? [CC] Yes, that's possible. We only focus on the data parts, but the transition parts could have a higher swing or lower due to the reflection. Thanks, CC
@ronidadon1Ай бұрын
Great video! Can you explain how you calculate the "zero forcing" TXFFE coefficients for a given channel response based on the received waveform
@circuitimageАй бұрын
Hi Roni, Nice to meet you and thanks for the good questions. To get the coefficients of all the precursor or the post-cursor ISI, we could just send a pulse response to a lossy channel and calculate the ratio between the main cursor (peak) w.r.t. the pre-cursor or the post-cursor amplitude.
@shaikjohnshaida40093 ай бұрын
Nice explanation. Can you please tell any text book ? we can refer regarding high speed SERDES blocks
@circuitimage3 ай бұрын
Hi Shaik, you can refer Prof. Razavi's book: www.amazon.com/Design-Integrated-Circuits-Optical-Communications/dp/0072822589
@madhooz2 жыл бұрын
Your videos are really helpful in understanding the signal flow in both frequency and time domain....
@circuitimage2 жыл бұрын
Thanks for the feedback. Let me know if you need more in other images. :)
Hi Johnny, 感謝你提出的好問題。您的理解是正確的。整體最大擺幅固定;因此,我們可以減少低頻擺幅,但將高頻擺幅保持在整體最大擺幅內!
@parkerm651410 ай бұрын
I am a new postgraduate that recently step on the path of learning SerDes. This video series will truly help a lot.🎉🎉
@circuitimage10 ай бұрын
Hi Parker, nice to mee you. I'm glad that helps. Feel free to let me know what else you'd like to learn. :)
@rezvanmohammadrezaee61212 жыл бұрын
Thanks for a great video! It really helped me understand all the effects that FFE equalization can have on the channel response.
@circuitimage2 жыл бұрын
You're very welcome!
@ssayank2 жыл бұрын
Great Videos. Concepts of FFE are explained very clearly.
@circuitimage2 жыл бұрын
Thanks for the feedback.
@yifengguo-t9u18 сағат бұрын
Why is it said that a coefficient greater than or less than 0 means there is no requirement?
@shadyEA607 ай бұрын
Thanks for the good video. is there a difference between pre-emphasis and de-emphasis terms?
@circuitimage7 ай бұрын
Hi Shadi, Good question. Thanks! The short answer is no, which is just different term people called it. Thanks, CC
@ashwinikumarib2596 Жыл бұрын
Thankyou so much for these series. Very helpful
@circuitimage Жыл бұрын
Hi Ashwini, nice to meet you and I'm glad I can help you. Please let me know if you have additional questions or feedback. :)😃
@abhiruplahiri12 жыл бұрын
Really like the images to present the core ideas. Cheers.
@circuitimage2 жыл бұрын
Thanks for the feedback.
@ZanZ-qi6wz Жыл бұрын
Thanks for the Great Video, It helps me understand better.
@circuitimage Жыл бұрын
Hi Zan, You're very welcome and I'm glad it helps you understand better. 😀
@xiaoyangwang1625 Жыл бұрын
Thanks a lot for this helpful video! One question, can you give some explanation of the pre-cursor and post-cursor? My understanding is that they are showing how much the distortion is before and after the symbol, the smaller the better, not sure is this is correct. Thanks.
@circuitimage Жыл бұрын
Hi Eren, nice to meet you and thank you for the feedback. You are correct. The pre-cursor and post-cursor are the distortions before and after the symbol, respectively. To have smaller distortions, the smaller the better. :)
@xiaoyangwang1625 Жыл бұрын
@@circuitimage Got it, thanks for the clarification!
@circuitimage Жыл бұрын
@@xiaoyangwang1625 You're very welcome and I'm glad that helps. 😃
Hi HG, Nice to mee you and thank you for the good feedback. The TX could send 0 or 1 with 50% probablity if there's no encoding. If yes, that would depend on the coding methodology. FYI: kzbin.info/www/bejne/qIXClap3qrJ7h6ssi=DDLeUKTDzNP9UcAw Thanks, CC
@changhsiao21322 жыл бұрын
Great explanations, Thanks!
@circuitimage2 жыл бұрын
Circuit Image 2 days ago Thanks for the feedback and I'm glad you like it. :)