<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/YzBtfN1LQtM" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span></div><div class="blog-content"> I challenged a software engineer to design his very first PCB. What happened?</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">The challenge</span></li><li class="chapters-list-item"><span class="chapters-time">01:01</span><span class="chapters-text">Schematic page</span></li><li class="chapters-list-item"><span class="chapters-time">03:46</span><span class="chapters-text">STM32</span></li><li class="chapters-list-item"><span class="chapters-time">10:18</span><span class="chapters-text">Power</span></li><li class="chapters-list-item"><span class="chapters-time">21:50</span><span class="chapters-text">Power LED</span></li><li class="chapters-list-item"><span class="chapters-time">23:29</span><span class="chapters-text">Boot and Reset</span></li><li class="chapters-list-item"><span class="chapters-time">27:47</span><span class="chapters-text">Crystal</span></li><li class="chapters-list-item"><span class="chapters-time">30:58</span><span class="chapters-text">USB</span></li><li class="chapters-list-item"><span class="chapters-time">33:59</span><span class="chapters-text">Arduino headers and User LED</span></li><li class="chapters-list-item"><span class="chapters-time">36:49</span><span class="chapters-text">SWI and UART connectors</span></li></div><div class="blog-content-links"><div>Links:</div><ul class="links-list"><li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li></ul></div></div>

Is this really how beginners design boards??? | Schematic Review

<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-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">00:17</span><span class="chapters-text">How eye diagram is created and why it´s useful</span></li>
            <li class="chapters-list-item"><span class="chapters-time">07:35</span><span class="chapters-text">How reflections influence eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:17</span><span class="chapters-text">Simulating reflections and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:19</span><span class="chapters-text">How crosstalk influences eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:36</span><span class="chapters-text">Simulating crosstalk and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">35:09</span><span class="chapters-text">How loss influences eye diagram shape</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:13</span><span class="chapters-text">Simulating loss and checking eye diagram</span></li>
            <li class="chapters-list-item"><span class="chapters-time">50:32</span><span class="chapters-text">Equalization explained</span></li>
            <li class="chapters-list-item"><span class="chapters-time">57:53</span><span class="chapters-text">CTLE Equalization</span></li>
            <li class="chapters-list-item"><span class="chapters-time">58:49</span><span class="chapters-text">FFE Equalization</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:02:19</span><span class="chapters-text">DFE Equalization</span></li>
    </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/Hfzq1QES-Q" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Some tips for when designing hardware and PCBs with simple RF sections and components. These concepts have aided me well when designing 4-layer embedded systems PCBs.<br><br>Topics: critical trace lengths, stackups, controlled impedance traces (microstrip, stripline), impedance discontinuities due to wide pads, clearances, bias tees.
    </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">Introduction</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:53</span><span class="chapters-text">Overview</span></li>
            <li class="chapters-list-item"><span class="chapters-time">02:08</span><span class="chapters-text">Critical length</span></li>
            <li class="chapters-list-item"><span class="chapters-time">06:45</span><span class="chapters-text">Stackup</span></li>
            <li class="chapters-list-item"><span class="chapters-time">08:51</span><span class="chapters-text">Controlled impedance traces</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:34</span><span class="chapters-text">Impedance discontinuities (pad-to-trace)</span></li>
            <li class="chapters-list-item"><span class="chapters-time">14:34</span><span class="chapters-text">Clearance</span></li>
            <li class="chapters-list-item"><span class="chapters-time">15:17</span><span class="chapters-text">Antenna bias tees</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://open-seneca.org">Open Seneca</a></li>

            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL courses</a></li>
        </ul>
    </div>  
</div>

Practical RF Hardware and PCB Design Tips - Phil's Lab #19

<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/5EeQPxRdurk" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        The best crosstalk explanation I have ever seen. What do you think? Thank you Eric Bogatin.
    </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">Intro</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">06:56</span><span class="chapters-text">Microstrip</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">08:49</span><span class="chapters-text">Adding another signal line</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">16:13</span><span class="chapters-text">Im wrong</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">21:55</span><span class="chapters-text">Near and far end crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">26:38</span><span class="chapters-text">Higher voltage currents</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">28:40</span><span class="chapters-text">Increasing current impedance</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">33:18</span><span class="chapters-text">Comparing reflections</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">35:30</span><span class="chapters-text">Frequency of ringing</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">37:18</span><span class="chapters-text">Microstrip crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">38:31</span><span class="chapters-text">Derivative crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">39:26</span><span class="chapters-text">What is impedance value of the driver</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">42:17</span><span class="chapters-text">Moving the traces farther apart</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">43:35</span><span class="chapters-text">Near and crosstalk coefficient</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">44:40</span><span class="chapters-text">Simulator</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">45:09</span><span class="chapters-text">Field solver</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">45:24</span><span class="chapters-text">Measuring crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">48:38</span><span class="chapters-text">Teledyne</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:00</span><span class="chapters-text">The Scale</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:33</span><span class="chapters-text">Rise Time</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">52:49</span><span class="chapters-text">Measuring the Scope</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">55:13</span><span class="chapters-text">Why is it a little longer</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">56:08</span><span class="chapters-text">Nearend crosstalk</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">56:38</span><span class="chapters-text">Termination</span>
            </li>
            <li class="chapters-list-item">
                <span class="chapters-time">58:53</span><span class="chapters-text">Expanding the timebase</span>
            </li>
        </ul>
    </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/eric-bogatin-368860/">Eric Bogatin</a></li>
            <li class="links-list-item"><a href="https://www.bethesignal.com/bogatin/">Eric's courses</a></li>
        </ul>
    </div>   
</div>


Understanding Crosstalk in PCB Layout – You may wish you knew this before (with Eric Bogatin)

<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/aySAg50S1E8" class="youtube-player" width="740" height="416.418" frameborder="0" allowfullscreen></iframe></span>
    </div>
    <div class="blog-content">
        Do you know what a nibble in DDR memory design is?
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.fedevel.com/welldoneblog/wp-content/uploads/2014/06/IMX6DQ6SDLHDG.pdf">iMX6 DDR3 Design Guide</a></li>
            <li class="links-list-item"><a href="https://www.nxp.com/files-static/32bit/doc/app_note/AN5097.pdf?&fasp=1&WT_TYPE=Application+Notes&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf">DDR4 Layout Design PDF</a></li>
            <li class="links-list-item"><a href="https://semiconductor.samsung.com/resources/device-operation-timing-diagram/DDR4_Device_Operations_Rev11_Oct_14-0.pdf">DDR Commands PDF</a></li>
            <li class="links-list-item"><a href="https://welldoneblog.fedevel.com/2011/06/15/ddr3-memory-chip-mirroring-pcb-layout/">DDR Mirroring</a></li>
            <li class="links-list-item"><a href="https://www.compuram.biz/documents/datasheet/519203ds_ddr2_1gb_f-die_based_rdimm_rev10.pdf">Memory Module PDF</a></li>
        </ul>
    </div>   
</div>


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Is this really how beginners design boards??? | Schematic Review

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

Watch Differential Pair Fields and Currents in PCB

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