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PCB Routing
Pros and Cons of Orthogonal Trace Routing in Multilayer PCBs
What would limit your use of orthogonal trace routing? Like most design questions, it depends on your signal speed and stackup, as well as placement in the PCB layout. Read this latest PCB design blog by expert Zachariah Peterson to learn more.
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The Fundamentals of High Speed SerDes Design
High speed SerDes design goes far beyond computer peripherals The challenges in high speed SerDes design filter right down to the PCB level and are all about backplane/daughtercard design, transmission line layout, selecting proper equalization schemes, and much more. This even gets down to the fundamentals, where stackup and power integrity become critical when driving transmitters and receiver ICs. If you’re designing a PCB as part of a SerDes
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PCB Bus Routing and Layout: The Basics
Power supply on a network switch Modern computing simply wouldn’t be possible without PCB bus routing and layout. The same goes for many digital systems that manipulate data in parallel. If you’re working on a new PCB design and you need to route a bus between different devices, there are some simple rules to follow to ensure your signals aren’t distorted and that successive devices are triggered correctly. As some designers may question the
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MIPI Physical Layer Routing and Signal Integrity
MIPI physical layer routing (C-PHY) is typically used to connect these smartphone cameras to a processor. When most designers talk about routing standards, particularly for advanced devices, they typically refer to differential routing standards (e.g., LVDS) that enable high data rates. These signaling standards have proliferated computers, networking equipment, smart electronics, and other areas, and they have been critical for operating with
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Patrick Züger Talks About the Altium Designer 20 New and Exciting Features
"Altium Designer - for me, it’s the best (PCB design) tool" says Patrick Züger, a veteran Altium Beta user. Patrick shares Altium Designer 20 new and exciting features. Interactive routing is one.
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PCB Trace Width vs. Current Table for High Power Designs
Copper is a strong conductor with a high melting point, but you should still do your best to keep temperatures low. This is where you’ll need to properly size power rail widths to keep the temperature within a certain limit. However, this is where you need to consider the current flowing in a given trace. When working with a power rail, high-voltage components, and other portions of your board that are sensitive to heat, you can determine the
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Experience The New World-Class Interactive Router in Altium Designer 20
Altium Designer 20 ushers in a whole new era of possibilities and amongst them is a truly game-changing Interactive Routing
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Delay Tuning for High Speed Signals: What You Need to Know
Length matched lines in a PCB Take a look at two signal readouts on an oscilloscope, and you can see how length/timing mismatches between signal traces can improperly trigger downstream gates. The situation becomes worse when we look at the travel time for a master clock signal and the roundtrip time for sent/received data in different computer interfaces. SDRAM has solved this nicely by placing a clock in the slave device and sending a clock
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Altium Designer 20 - Key Features Sneak Peek
Are you ready to meet the next generation of Easy, Modern, and Powerful PCB design? Watch this live webinar to
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Follow Your Multilayer Ground Return Path to Prevent EMI
Following the path back to ground can quickly become complex in a complicated multilayer PCB. When your PCB has a small layer count (e.g., a 4-layer board with two plane layers), it becomes rather easy to determine the return path and deliberately design it to prevent EMI. The situation becomes more complicated when you’re working with higher layer counts. Multiple plane layers and conductors can form the ground return path, even if the conductor
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Push and Shove Router: How it Works and Why You Need It
If you have a complex layout like the one shown above, and you need to move traces or vias around the board, what can you do to decrease your routing time? This is where the push and shove router feature in Altium Designer can be a huge help. Using this feature eliminates the need to reroute a large number of unselected traces as you adjust traces and vias in your layout. So when would you need to use something like this? Doesn’t this interfere
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Never Cross a Ground Plane Gap in High Speed PCB Design
I often browse electronics and PCB forums, and I see the same question asked over and over: Why shouldn’t I route a trace over a split in my ground plane? This question gets asked by everyone from makers to professional designers who are just dipping their toes into high speed PCB design. For the professional signal integrity engineer, the answer should be obvious. Whether you’re a long-time PCB layout engineer or a casual designer, it helps to
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Backplane Routing Topology for Gigabit Copper and Fiber Networks
Backplanes are the backbone of modular computing platforms, providing a fabric that interlinks pluggable daughtercards in a single system. The design of backplanes must support interfaces on the daughtercards, often at high data rates reaching multiple Gbps. Some standards also specify system design requirements that support RF or fiber integration into these systems. The RF and fiber portion is normally integrated through a specialized connector
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Symmetric Stripline Inductance or Impedance Calculators and Formulas
In a previous article , we looked at the inconsistencies that can arise when using different calculators to compute the impedance of surface and embedded microstrip traces. Many of the same issues mentioned in the previous article apply to stripline impedance calculators. Symmetric striplines are easier to address than asymmetric striplines, both numerically and analytically. Here, we’ll give a short comparison of the various impedance formulas
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Ethernet Layout Routing Guidelines and Standards: MAC, PHY, and RJ-45 Connectors
Magnetics termination has little to do with actual magnets. Here are some important ethernet layout routing guidelines to ensure signal integrity.
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5G Antenna Tuning in Mobile and IoT Devices
5G antenna tuning is like tuning a guitar as you play Guitar players know all about tuning their instruments. Whether swinging a whammy bar on stage or just ensuring each string hits the right note, this tuning changes that the resonant frequencies of each to the tone desired by the musician. To continue the recent series of articles on PCB design for 5G systems, one other aspect of designing RF design for 5G-capable wireless systems involves a
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Changing PCB Reference Planes During Routing in Multilayer Boards
Vias with annular rings for reaching an interior PCB layer If you’re a new designer and you take a look at some boards in common electronic products, you may not even realize they are multilayer boards unless you know exactly where to look. The fact is that more complex devices simply do not allow every single trace to be placed on a surface layer, thus signals must be routed within an interior layer in order to make the desired connections. With
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