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Signal Integrity

Browse our library of resources to learn more about pcb design and signal integrity.

Searching for Clarity: Signal Integrity Issues in PCB Design The clarity of TV signal transmission these days is amazing. I can still remember the days when I had a set of rabbit ears perched atop my 19” RCA. It was a challenge to position them just right to get the clearest picture, not to mention having to adjust them for every channel. Sometimes it’d take all night just to find the channel I wanted, so I’d sit down for five minutes and then head to bed. And if the weather was bad, forget about it. While Read Article

Backroads or Highway: Managing PCB Power Distribution with a PDN Analyzer Who hasn’t been caught daydreaming out the window, overlooking the lines of cars on the freeway at a standstill, wondering about easier or more effective ways of getting to your job on time? And even then, sometimes the alternate routes aren’t always the fastest—there could be road construction, or an event going on which makes you have to re-route even more. At that point, most tend to throw all hopes for getting to work on time out the window Read Article

Boats With The Current: Microstrip and Stripline Transmission Line Trade-offs In F. Scott Fitzgerald’s The Great Gatsby, the narrator, Nick Carraway, is torn between infiltrating the notorious elite social circles by attending his neighbor Jay Gatsby’s infamous mansion parties in Long Island, New York and establishing himself on the east coast in a finance career. It can be easy to have an understanding of The Great Gatsby through its context - the roaring twenties, flappers, prohibition - it wouldn’t do justice to any of Read Article

Design for Electromagnetic Compatibility in PCB: Let Your Revels Never End What if William Shakespeare worked as an electrical engineer instead of a poet and playwright? If electronics existed during the mid-to-late sixteenth century, the Bard may have studied the impact of electromagnetic interference (EMI) on circuits and the need for electromagnetic compatibility (EMC). After all, he wrote about his fascination with noise in The Tempest: “Be not afeard; the isle is full of noises, Sounds, and sweet airs, that give Read Article

Untangle Yourself with an SD Card Bootloader Like Ray LaMontagne, I’ve got trouble. Smartphone trouble, trouble, trouble, trouble. I can figure out the apps I want, and I’ve got the games I need (wait, I might have those priorities backward), but transferring all my images and data is a bit more of a pain. There always seem to be music that gets left behind or images that, for whatever reason, refuse to back-up. I consider myself pretty savvy, but when I got a new smartphone I was starting Read Article

Designing a User Database for Card Access Systems How long does it usually take for you to unpack your clothes and organize them after you move? If you’re anything like me, they might slowly move from your suitcases and boxes to a dresser over a healthy span of weeks. In the interim, I have to develop an internal logic of where, in all the clutter, certain clothes are located: dress shirts in the box at the foot of the bed, socks and underwear tucked in front of the dresser. Even my logic fails Read Article

PCB Technology Trends: The Benefits of Internet of Things Security Gateways Do you ever like to take a break from social situations for a few days and spend some quality time with your television? I do that maybe a little more often than I should, and last week I spent that time binge-watching the new season of Stranger Things. If you haven’t seen the show, it’s about a girl with psychic powers who opens a portal to another dimension (the Upside Down) filled with creatures. The gateway to that world lets monsters loose Read Article

Introduction to High Speed PCB Designing: How to Eliminate Crosstalk Recently at a wedding reception I was trying to talk to a gentleman who was sitting at the same table as me. Unfortunately there was a woman sitting between us carrying on a conversation with someone else sitting on my other side. With all the commotion of the reception in the background, conversation was difficult to begin with. Having another discussion taking place between us though made our conversation impossible. What we had was crosstalk Read Article

Essential PCB Design Tips: How to Implement a Watchdog Timer in Your PCB Design When you work from home there are some perks of the job. You can make your own meals, slot in some laundry over lunch, and drink all the tea you want. I use a stove-top kettle to boil water for my tea, so when I get in the writing zone, I rely on its high pitched whistle to tell me when it’s done. Except sometimes when I’m careless, I don’t fit the lid on properly. As a result, the kettle remains silent despite the fact that the liquid water Read Article

Omer Mahgoub from Square Kilometer Array (SKA) Africa and PCB Design for Astronomy Judy Warner: Omer, will you please share what the SKA is, what countries are involved, and what purpose it serves? Omer Mahgoub: The SKA (Square Kilometre Array) is an international effort to build the world's largest radio telescope, with a total collecting area of 1 square kilometer and located on two continents (Africa and Australia). Organizations from 10 countries are members of the SKA: Australia, Canada, China, India, Italy, New Zealand Read Article

How to Implement Supervised Inputs in Your PCB Circuit Design Have you ever worked late on a design project and forgot to eat? I was literally starving when I finished off one of my regular design projects. I decided to go for a quick meal at a local eatery. I placed my order and hoped the service would be fast. However, after 45 minutes and no food, I was told that the kitchen has missed my order. I learned my lesson that you can’t expect that your order is being followed just because you placed it. The Read Article

RF Interference Prevention and RF PCB Design in the Internet of Things Have you ever been to a party where there was so much noise you could barely hear yourself think? I’m a dedicated introvert, but sometimes my friends lure me out to such gatherings with promises that it will be “very relaxed.” They never are, and I don’t seem to learn. It’s times like those that I wish it was socially acceptable to wear noise-canceling headphones to such events. In the world of electronics, the burgeoning Internet of Things (IoT) Read Article

Bluetooth Low Energy and the Internet of Things Did you ever “reinvent yourself” at some time in your life? I did, I went from the nerd in high school who wore cargo shorts and high socks to a less nerdy college student who had regular socks and shorts with the fashionable number of pockets. By the end of college, I had learned “social skills” and was finally ready to enter society as the best, or at least acceptable, version of me. People aren’t the only things that need reinvention, so do Read Article

Current Limiting Resistor LED Systems with Matching Voltage Power Supply Most of my friends in engineering live a balanced lifestyle. However, there are some engineers that are workaholics. These engineers do not limit their working hours and are constantly dealing with stress. Their lifestyle is not so different from an LED’s that is directly connected to a power supply without a current limiting resistor or with the wrong resistor value. They start out strong, but eventually flicker and burn out. In the architecture Read Article

Introduction to High Speed PCB Designing: Is FR-4 the Best Board Material Choice for High Speed PCB Design? We’ve all been there at one time or another when we’re tasked with a project that lies outside our comfort zone. For me, that day came when my boss asked me to design a high speed board. While I considered myself to be a somewhat experienced PCB designer, I knew that high speed PCB design has many restrictions that you do not normally encounter when you’re designing an average circuit. Initially I invested time into making my schematics Read Article

What Causes Ringing on a PCB and How to Solve It: PCB Design Tips & Tricks - Altium Audio Bites Altium Audio Bites, giving you bite-sized information that's easy to digest and apply to your everyday design tasks. From our PCB Design Tips & Tricks audio series here is: What Causes Ringing on a PCB and How to Solve It. All our audio series are from real PCB designers in the field, detailing their day to day problems and experiences. We hope you can learn from this as much as we have. Give it a listen and let us know what you think in the Read Article

Advantages of Massive MIMO for 5G Cellular Infrastructure Editorial credit: PureRadiancePhoto / Shutterstock.com Even though I ended up here in southern California, I was originally born in Texas. We have a saying that you probably have heard, “everything’s bigger in Texas.” That turned out to be true for me, as I’m the tallest member of my extended family. I’d like to think that the minds behind massive multiple input multiple output (MIMO) antenna arrays were also born in Texas. MIMO has been around Read Article