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12 Nov, 2014

John McMillan Raleigh, NC — The premier show for printed circuit board design and manufacturing in the Southeast, PCB Carolina Conference & Exhibition, returned to the McKimmon Center at NC State University on November 5 and what an eventful day it was! The standing-room-only keynote address was delivered by Dr. Eric Bogatin whose talk entitled “The Future of Circuit Boards in the 28 Gbps Regime: Is the … Read More

10 Nov, 2014

Colin Walls I am continuing to catch up with highlighting articles that I have had published at embedded.com. This time they are focused on C++ and on multicore embedded applications … Overloading or obfuscation? Operator overloading is a powerful feature of the C++ language. Used with care, it can yield readable, maintainable and efficient code. However, it is just as easy to write “clever” code … Read More

6 Nov, 2014
PCB Design

DO sweat the small stuff

Posted by Patrick Carrier

Patrick Carrier My grandma always told me not to sweat the small stuff, and since she just celebrated her 100th birthday, I am inclined to take her advice.  Unfortunately, that advice does not extend well to 10GHz serial links on a PCB, where you really DO need to sweat the small stuff.  With edge rates on the order of 50ps (that’s about 300 mils long on a PCB), 10GHz signals get affected by almost any discontinuity … Read More

6 Nov, 2014

Jim Martens

Did you hear the news? On Tuesday, Digi-Key announced the availability of Designer Schematic and Designer Layout. These are professional design tools, based on xDX Designer and PADS Layout for engineers who need the quality of high-end PCB schematic capture and layout, but at a very affordable price. The Designer products seamlessly integrate with PartQuest, a new component research engine tied directly

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5 Nov, 2014

Matthew Ballance Between 2006 and 2014, the average number of IPs integrated into an advanced SoC increased from about 30 to over 120. In the same period, the average number of embedded processors found in an advanced SoC increased from one to as many as 20. However, increased design size is only one dimension of the growing verification complexity challenge. Beyond this growing-functionality phenomenon are new layers … Read More

5 Nov, 2014
PCB Design

Hitting 100 ohms, the right way

Posted by Patrick Carrier

Patrick Carrier When designing the trace configuration for your differential pairs, you are typically targeting 100 ohms differential.  That means each trace would be a 50-ohm trace, if there were no coupling between the traces.  But, you usually want some decent coupling between the traces, so a good single-ended impedance target for each trace is between 60 and 75 ohms.  That means that the differential pairs will … Read More

5 Nov, 2014

Tom Fitzpatrick When I was at DAC this year, I had a few folks come up to me at our Verification Academy booth and suggest that I do a “Recipe of the Month” webinar on UVM sequences. They’d seen plenty of information on sequence mechanics and generating stimulus with sequences, but these users were particularly interested in Slave sequences, which aren’t necessarily very intuitive. Of course, … Read More

3 Nov, 2014

Colin Walls The Fall is a big time for conferences and this week will see me clocking up some more air miles as I visit two events in Europe. The first conference is in Stockholm, Sweden – Embedded Conference Scandinavia [ECS]. I attended this lively event last year and on several previous occasions. This year, I have two presentations, both on Tuesday: At 10:00: Self-testing in Embedded Systems At 14:00: … Read More

3 Nov, 2014

Danit Atar PCB design is a complicated task, partially because each design task has an effect on the outcome of the rest of the design stages. Get your ducks in a row ! Of course, you need to design your schematic, make sure you have no signal- and power-integrity issues, place your components, route your board, make sure your design can be manufactured, and so forth. But how much more complicated is it when … Read More

31 Oct, 2014
IC Design

When Reliability Goes Up in Flames

Posted by Shelly Stalnaker

Shelly Stalnaker I recently returned from my first-ever trip to Japan. While I was enthralled by its beauty and history, entertained by both traditional and avant-garde theatre, and enticed by new food opportunities, it was five minutes of television that caught my attention one day. Although I didn’t understand a word of the report, the problem was obvious—all over the region, vending machines were spontaneously … Read More

31 Oct, 2014

J VanDomelen NASA has increased its reliance on private, commercial space companies following the retirement of the U.S. Space Shuttle program in 2011. Among NASA’s growing list of commercial partners is Orbital Sciences Corp. in Dulles, Virginia. The Antares launch vehicle, from Orbital Sciences Corp., is the largest rocket produced by the company and the largest to be launched from the Mid-Atlantic Regional Spaceport … Read More

30 Oct, 2014

John Day Bosch noted this week with some justifiable pride that the electronic stability program (ESP) it pioneered becomes a standard in the European Union as of November 1. From there on in the EU, all newly registered passenger cars and light commercial vehicles with a gross vehicle weight of up to 3.5 metric tons must be equipped with the anti-skid system. The regulation will take effect for all other vehicles … Read More

30 Oct, 2014

J VanDomelen NASA personnel have gotten really good at social media. In fact, NASA engineers, scientists, and officials have been taking to various social media and news outlets, generating a great deal of excitement over a night launch on the East Coast of the United States. Military and aerospace (mil/aero) enthusiasts everywhere – this mil/aero geek included – watched with bated breath for what was to be an historic … Read More

29 Oct, 2014

J VanDomelen India solidified its place in the history books when late last month (September 2014) the Mars Orbiter Mission (MOM) and technology demonstrator successfully entered into orbit around the Red Planet. The MOM achievement launched India into aerospace history as the first nation in Asia to reach Mars—joining the ranks with the European Space Agency (ESA), U.S. National Aeronautical Space Administration … Read More

29 Oct, 2014

Nazita Saye My appreciation of gadgets isn’t anything that should surprise you. I’ve already talked about a few and some have proven more useful than others. For example, my Fitbit One accompanies me on every hike so I can track and then bore my friends with all kinds of useless information while some gadgets such as my waffle iron were bought rather impetuously and get dusted once every blue moon … … Read More

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