Skip to main content
Popular by Topic
Bill of Materials Blog
Design Data Management
Design for Manufacturing (DFM)
High Speed Design
Simulation / Analysis
Browse our library of resources to learn more about pcb design and signal integrity.
Designing for Antenna Isolation in Your Wireless System
Antenna isolation is designed to prevent interference between antennas and ensure diversity in wireless systems.
Differential Crosstalk and Spacing Between Differential Pairs
Differential crosstalk causing problems in your signals? Here’s how differential signals produce crosstalk and how you can ensure differential signal integrity.
PCB Debugging: Tips, Tools, and Tricks
There are some basic PCB debugging steps you should take when your new prototype has some signal integrity problems.
Switchback Routing vs. Serpentine Routing for Maximum Density
Choosing between switchback routing or serpentine routing means considering signal integrity and crosstalk in your board.
Signal Integrity Evangelist Eric Bogatin, our Expert Insider to DesignCon 2020
Signal integrity expert, Dr. Eric Bogatin, joins us in this episode to talk about the upcoming DesignCon conference and expo that will be held in Santa Clara, CA January 28th through January 30th. Dr. Bogatin shares information about the presentations he’ll be giving; this includes a 2-part S-Parameter master class, speed training about understanding TDR measurements, and a session tackling tricks the experts use to get more out of their
Living on the Edge (Rate) — It’s All About Time and Distance
The focus of this article is the clarify the origins of the phrase edge rate, what it really means relative to the design process and the best means for addressing it.
Should You Use Your Power Plane as a Return Path?
Power planes and ground planes are important for more than just distribution of supply and return power. When defining reference planes, both with impedance controlled routing and in managing return paths, your stackup might force return currents to pass into a power plane before being coupled back to a ground layer. Let’s take a look at some good practices for controlling return paths in your PCB with a power plane as a return path. Signal
The Case Against Orthogonal Trace Routing in Multilayer PCBs
Can you spot the orthogonal trace routing in this complex board? Neither can I... I occasionally see questions on forums, some blog posts, and even application notes that continue to recommend the use of orthogonal routing, usually in 2-6 layer boards. When looking at application notes, I tend to default to Rick Hartley’s advice and try to think about this advice in context. Unfortunately, recommendations in application notes are not always taken
Reflecting on Your Design— What are Reflections and What Do They Do to a Signal? Part One
In describing what happens when an electromagnetic field or wave is traveling on a transmission line, we often talk about the various things that can disrupt that wave. Among the most common of these things are reflections. Part 1 of this article will describe what reflections are and how they are caused. The second part will discuss what they do to a signal. Then, a separate article will address how reflections are controlled by terminations
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
Some Pre-layout Power Spectrum Analysis Tips in Altium Designer
Take advantage of your simulation tools before test and measurement. Here I want to expand a bit on the power spectrum analysis features in Altium Designer®. In a previous post, we looked at working with simulations involving a frequency modulated signal fed into a nonlinear component (an NPN transistor). In this simulation, we ended with the Fourier spectrum at the load resistor for various values of base voltage/current. In the time-domain
DDR5 PCB Design and Signal Integrity: What Designers Need to Know
Development of the world’s first DDR5 RAM was announced just 1 year ago, with peak speed of 5200 MT/sec/pin (compare that to 3200 MT/sec/pin with DDR4) at 1.1 V. Full-scale production is set to begin in 2020, and demand for this new generation of memories with 8, 16, and 32 GB capacities will quickly outpace that for earlier generations. JEDEC rates DDR5 speeds up to 6400 MT/sec/pin, with bandwidth increased up to 300 GB/s. The faster speeds
Substrate Integrated Waveguide Routing for mmWave PCBs
A substrate integrated waveguide acts similar to optical fibers The applications of mmWave signals used to be confined to defense, but now mmWave systems are becoming more common. You can thank car radar, UAV radar, upcoming rollouts of 5G, and current research on 6G for bringing mmWave technology into the mainstream. Routing with mmWave signals has forced designers to rethink their routing practices and interconnect designs. This has motivated
Parasitic Extraction with an Electromagnetic Solver in PCB Routing
Keep your signals synchronized with parasitic extraction in your PCBs Parasitic extraction: the integrated circuit design community must grapple with this task on a delay basis, especially once gate features are reduced below ~350 nm and chips run at high switching rates. The PCB community also has to deal with this idea in order to better design power delivery networks, interconnects with extremely precise impedance, and properly quantify
High Speed Routing Guidelines for Advanced PCBs
You can create this advanced board with these high speed routing guidelines for advanced PCBs Newer designs are continuing to get faster, with PCIe 5.0 reaching 32 Gb/s, and PAM4 pushing signal integrity and speeds to the limit. Proper interconnect design must account for the lower noise margins of advanced devices, impeccable power stability requirements, and much more to ensure signals can be received properly. With advanced devices running at
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
EMI from Heatsinks and What You Can Do About It
Selecting the right heatsink can help you keep your system cool and prevent EMI. While it may not be obvious, or while most designers may not think to check, heatsinks can generate EMI when they are connected to a switching element. This is a common problem in power supply design, and whenever a heatsink is placed in contact with a component that switches with high current draw at high frequency. Reducing EMI from heatsinks requires balancing the