# Ask Me Anything with Eric Bogatin **URL:** \ **Category:** Ask Me Anything\ **Tags:** signal-integrity, transmission-line, controlled-impedance\ **Created:** [November 18, 2023, 12:18am UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506 "2023-11-18T00:18:49Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![lucy.sierracircuits](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/lucy.sierracircuits/32/8_2.png) [@lucy.sierracircuits](https://sierraconnect.protoexpress.com/u/lucy.sierracircuits)\ **Post date:** [November 18, 2023, 12:18am UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/1 "2023-11-18T00:18:49Z")
> **Ask Me Anything with Eric Bogatin** > > **Starts:** December 1, 2023, 1:00pm (America/Los\_Angeles)\ > **Ends:** December 1, 2023, 2:00pm (America/Los\_Angeles) Have a question about **signal integrity**? Ask **Prof. Eric Bogatin**! ---
**Author:** ![jeffrey.thwaits](https://avatars.discourse-cdn.com/v4/letter/j/ecd19e/32.png) [@jeffrey.thwaits](https://sierraconnect.protoexpress.com/u/jeffrey.thwaits)\ **Post date:** [November 28, 2023, 7:05pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/2 "2023-11-28T19:05:18Z")
How does layer stack up effect high speed signal integrity? Are there preferred stack ups for signal integrity? ---
**Author:** ![ravi.blore](https://avatars.discourse-cdn.com/v4/letter/r/4bbf92/32.png) [@ravi.blore](https://sierraconnect.protoexpress.com/u/ravi.blore)\ **Post date:** [November 29, 2023, 11:30pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/3 "2023-11-29T23:30:55Z")
Hi Eric. What do you think of AI-powered design tools and do you think these can actually help with designing for high speed, SI, etc.? Is there an AI design tool you’ve tried and would recommend? ---
**Author:** ![pratikshak](https://avatars.discourse-cdn.com/v4/letter/p/d6d6ee/32.png) [@pratikshak](https://sierraconnect.protoexpress.com/u/pratikshak)\ **Post date:** [November 30, 2023, 12:17am UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/4 "2023-11-30T00:17:41Z")
Can you give a physical solution to creating a return path on a pcb design? I learned that one should add a parallel return copper trace along the signal trace and shot it to the lower ground plane at both ends. Is that true? ---
**Author:** ![Hemnandan](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/hemnandan/32/41_2.png) [@Hemnandan](https://sierraconnect.protoexpress.com/u/Hemnandan)\ **Post date:** [November 30, 2023, 8:04am UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/5 "2023-11-30T08:04:18Z")
How crucial is selecting the right copper profile for high-speed applications, and Is it really necessary to consider roughness factor of copper foils. ---
**Author:** ![Pooja\_Mitra](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Post date:** [November 30, 2023, 12:13pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/6 "2023-11-30T12:13:28Z")
In high-speed designs, how does the choice of materials for transmission lines affect stub behavior? ---
**Author:** ![Pooja\_Mitra](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Post date:** [November 30, 2023, 12:14pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/7 "2023-11-30T12:14:52Z")
What techniques can be employed to minimize signal losses in RF transmission lines? ---
**Author:** ![Pooja\_Mitra](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Post date:** [November 30, 2023, 12:15pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/8 "2023-11-30T12:15:49Z")
Are there specific considerations for controlled impedance in RF designs operating at millimeter-wave frequencies? ---
**Author:** ![Pooja\_Mitra](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Post date:** [November 30, 2023, 12:16pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/9 "2023-11-30T12:16:42Z")
What testing methodologies are commonly employed to validate RF boards’ performance, especially in signal integrity and antenna characteristics? ---
**Author:** ![Pooja\_Mitra](https://avatars.discourse-cdn.com/v4/letter/p/ce73a5/32.png) [@Pooja\_Mitra](https://sierraconnect.protoexpress.com/u/Pooja_Mitra)\ **Post date:** [November 30, 2023, 12:17pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/10 "2023-11-30T12:17:11Z")
Are there any regulatory guidelines specifying minimum separation distances between antennas in 5G RF boards to avoid interference and distortions? ---
**Author:** ![PoulomiG](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/poulomig/32/288_2.png) [@PoulomiG](https://sierraconnect.protoexpress.com/u/PoulomiG)\ **Post date:** [November 30, 2023, 12:21pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/11 "2023-11-30T12:21:54Z")
How can circuit balancing be achieved through termination routing? ---
**Author:** ![PoulomiG](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/poulomig/32/288_2.png) [@PoulomiG](https://sierraconnect.protoexpress.com/u/PoulomiG)\ **Post date:** [November 30, 2023, 12:22pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/12 "2023-11-30T12:22:18Z")
What is the maximum trace length I can have in a PCB without termination? ---
**Author:** ![PoulomiG](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/poulomig/32/288_2.png) [@PoulomiG](https://sierraconnect.protoexpress.com/u/PoulomiG)\ **Post date:** [November 30, 2023, 12:22pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/13 "2023-11-30T12:22:56Z")
Is there any specific rule to terminate differential pairs and single-ended traces? ---
**Author:** ![PoulomiG](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/poulomig/32/288_2.png) [@PoulomiG](https://sierraconnect.protoexpress.com/u/PoulomiG)\ **Post date:** [November 30, 2023, 12:23pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/15 "2023-11-30T12:23:38Z")
How to reduce the effects of trace stubs created by a parallel termination resistor? ---
**Author:** ![PoulomiG](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/poulomig/32/288_2.png) [@PoulomiG](https://sierraconnect.protoexpress.com/u/PoulomiG)\ **Post date:** [November 30, 2023, 12:24pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/16 "2023-11-30T12:24:03Z")
Can tightly coupled differential pairs reduce crosstalk? How much distance between two traces in a differential pair is ideal? ---
**Author:** ![Mohamed\_Faheemuddin](https://avatars.discourse-cdn.com/v4/letter/m/4da419/32.png) [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Post date:** [November 30, 2023, 12:35pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/18 "2023-11-30T12:35:23Z")
How can signal integrity be optimized in mixed-signal PCBs with analog, digital, and RF components? ---
**Author:** ![Mohamed\_Faheemuddin](https://avatars.discourse-cdn.com/v4/letter/m/4da419/32.png) [@Mohamed\_Faheemuddin](https://sierraconnect.protoexpress.com/u/Mohamed_Faheemuddin)\ **Post date:** [November 30, 2023, 12:36pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/20 "2023-11-30T12:36:01Z")
When optimizing differential pair routing for signal integrity, what design practices do you follow to maintain balanced impedance and minimize skew? ---
**Author:** ![milan](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/milan/32/10_2.png) [@milan](https://sierraconnect.protoexpress.com/u/milan)\ **Post date:** [November 30, 2023, 12:58pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/21 "2023-11-30T12:58:47Z")
What specific parameters should I look for when analyzing eye diagrams? ---
**Author:** ![milan](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/milan/32/10_2.png) [@milan](https://sierraconnect.protoexpress.com/u/milan)\ **Post date:** [November 30, 2023, 12:59pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/22 "2023-11-30T12:59:14Z")
What simulation tools do you find most effective in predicting high-frequency behavior? ---
**Author:** ![milan](https://sea2.discourse-cdn.com/sierraconnect/user_avatar/sierraconnect.protoexpress.com/milan/32/10_2.png) [@milan](https://sierraconnect.protoexpress.com/u/milan)\ **Post date:** [November 30, 2023, 1:00pm UTC](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506/24 "2023-11-30T13:00:47Z")
How is propagation delay in a transmission line affected by varying frequencies? [Next page](https://sierraconnect.protoexpress.com/t/ask-me-anything-with-eric-bogatin/506.md?page=2)