<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/sKOUOU-hVEs" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
This video will help you to understand eye diagrams. Thank you very much Tim Wang Lee
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.keysight.com/find/ads-si-workshop">Learn more about Signal Integrity with ADS</a></li>
            <li class="links-list-item"><a href="https://www.keysight.com/us/en/products/software/pathwave-design-software.html">Get a head start with Electronic Design Automation</a></li>
            <li class="links-list-item"><a href="https://www.linkedin.com/in/timwanglee/">Connect with Tim</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

What does an eye diagram show? Here is how you recognize problems - reflections, crosstalk and loss

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/Rr9NBtrA4t4" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Watch how differential pair signals are travelling through a PCB. Thank you very much Yuriy Shlepnev 
    </div>

    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What is this video about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:33</span><span class="chapters-text">Differential pairs routed on top / bottom, THIN PCB, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:56</span><span class="chapters-text">3W, Top / Bottom</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:17</span><span class="chapters-text">THICK PCB, Top / Bottom</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:49</span><span class="chapters-text">No GND plane</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:01</span><span class="chapters-text">Differential pairs inside of PCB</span></li>
            <li class="chapters-list-item"><span class="chapters-time">45:30</span><span class="chapters-text">3D animation, top/bottom, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">48:51</span><span class="chapters-text">3D animation, top/bottom, 3W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">57:12</span><span class="chapters-text">3D animation, inside of PCB, 1W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:40</span><span class="chapters-text">3D animation, inside of PCB, 3W</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:06:21</span><span class="chapters-text">Crosstalk examples</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.linkedin.com/in/yuriy-shlepnev-7b39136/">Yuriy's LinkedIn</a></li>
            <li class="links-list-item"><a href="https://www.simberian.com/">Yuriy's company</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Watch Differential Pair Fields and Currents in PCB

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/I_MNw4EWer0" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Professional hardware design of complex boards explained by Istvan Nagy
    </div>

    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What is this video about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:59</span><span class="chapters-text">Learning step-by-step</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:53</span><span class="chapters-text">Where we can find electronics</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:02</span><span class="chapters-text">Misconceptions</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:30</span><span class="chapters-text">Istvan's book</span></li>
            <li class="chapters-list-item"><span class="chapters-time">44:35</span><span class="chapters-text">Testing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">51:19</span><span class="chapters-text">What to learn</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:05:09</span><span class="chapters-text">What do we need to start</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:15:35</span><span class="chapters-text">Learning types</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:23:29</span><span class="chapters-text">Learning path</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:27:48</span><span class="chapters-text">Hobby tools</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:37:56</span><span class="chapters-text">Production</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:45:05</span><span class="chapters-text">Company types</span></li>
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.amazon.com/Complex-Digital-Hardware-Design-Istvan/dp/1032702087">Istvan's Book</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Are you the right person to design complex electronic boards?

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/zC5RxBF-Ydg" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This short video demonstrates how to use variant manager in Altium Designer. Once set up correctly it’s easy to generate BOMs or Print schematics for different variants.<br><br>

        What are different variants? For example in case you have some optional resistors which can be fitted for one variant, but not for other.
    </div>
</div>


Altium Designer Tutorial – Variants are useful

<div class="entry-content">

    <div class="blog-content">
        Here is the PCB stackup what I normally start with + requirements for minimum VIA, track, clearance and impedances.
        <ul class="content-list">
            <li class="content-list-item"><span class="content-text"><b>12 Layers:</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">L1 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L2 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L3 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L4 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L5 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L6 – Powers</span></li>
                    <li class="content-list-item"><span class="content-text">L7 – Powers</span></li>
                    <li class="content-list-item"><span class="content-text">L8 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L9 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L10 – Signal</span></li>
                    <li class="content-list-item"><span class="content-text">L11 – GND</span></li>
                    <li class="content-list-item"><span class="content-text">L12 – Signal</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>Required impedances</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">Single ended: 50 OHMs (all signal layers)</span></li>
                    <li class="content-list-item"><span class="content-text">Differential: 70, 90 and 100 OHMs (all signal layers)</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>Other requirements</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">Minimum through-hole VIA: 0.45mm (pad) / 0.2mm (drill)</span></li>
                    <li class="content-list-item"><span class="content-text">Minimum track / clearance: 0.1 mm / 0.1 mm (more expensive PCB: 0.075mm / 0.075mm)</span></li>
                </ul>       
            </span></li>
            <li class="content-list-item"><span class="content-text"><b>If uVIAs are used</b>
                <ul class="content-list">
                    <li class="content-list-item"><span class="content-text">uVIA: 0.25mm (pad) / 0.1mm (laser drilled hole)</span></li>
                    <li class="content-list-item"><span class="content-text">buried VIA: 0.45mm (pad) / 0.2mm (drill)</span></li>
                </ul>       
            </span></li>
        </ul>
     </div>

    <div class="blog-content-text">
        I also found useful information about HDI stackups in this Mentor document: <a href="http://www.mentor.com/pcb/resources/overview/hdi-layer-stackups-for-large-dense-pcbs-723df14d-88f7-4e34-b47f-178d8c69ba1b" >HDI Layer Stackups for Large Dense PCBs</a><br><br>

        HDI PCB technology comparison (picture from the Mentor document)
    </div>

    
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/3ef7e-stackup_example.jpg" alt="stackup_example" />
    </div>

    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.mentor.com/pcb/resources/overview/hdi-layer-stackups-for-large-dense-pcbs-723df14d-88f7-4e34-b47f-178d8c69ba1b" >HDI Layer Stackups for Large Dense PCBs</a></li>
        </ul>
    </div>  
</div>

PCB stackup example – minimum track, clearance, VIA …

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe src="https://www.youtube.com/embed/6AU94oTnG68" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        This short video demonstrates how to create a simple 3d component in Altium Designer.
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.fedevel.com/welldoneblog/2011/08/altium-designer-3d-model-of-your-pcb-its-reallyeasy/">Altium Designer – 3D model of your PCB – it’s really easy</a></li>
        </ul>
    </div>  
</div>


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Altium Designer Tutorial – Create 3D component / footprint

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What does an eye diagram show? Here is how you recognize problems - reflections, crosstalk and loss

Watch Differential Pair Fields and Currents in PCB

Are you the right person to design complex electronic boards?

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