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Reduce Common-Mode Noise in Your Power Supply with Impedance Balancing
Simple switching regulator circuits that operate in compact spaces, like on a small PCB, can usually be deployed in noisy environments without superimposing significant noise on the output power level. As long as you lay out the board properly, you’ll probably only need a simple filter circuit to remove EMI on the inputs and outputs. As the regulator becomes larger, both physically and electrically, noise problems can become much more apparent, namely radiated EMI and conducted EMI in the PCB layout.
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Part 1: Why Your PCB Design Review Process Is Obsolete and What You Can Do About It
A PCB design review is a practice to review the design of a board for possible errors and issues at various stages of product development. It can range from a formal checklist with official sign-offs to a more free-form inspection of schematic drawings and PCB layouts. For this article, we will not delve into what to check during a design review process but rather look at how a review process itself usually unfolds and how to optimize it to get the most out of your time.
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Part 2: Why Your PCB Design Review Process Is Obsolete and What You Can Do About It
As we established in Part 1, the PCB design review and collaboration practices have room for improvement in many organizations. To address this, we developed Altium 365. Let's examine how running a PCB project through Altium 365 compares to other methods.
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What is PCB Star Grounding and Why Would Anyone Use It?
If you look on the internet, you'll find some interesting grounding recommendations, and sometimes terminology gets thrown around and applied to a PCB without the proper context or understanding of real electrical behavior. DC recommendations get applied to AC, low current gets applied to high current, and vice versa... the list goes on. One of the more interesting grounding techniques you'll see as a recommendation, including on some popular engineering blogs within the industry, is the use of PCB star grounding.
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Your Guide to PCB Silkscreen
Every PCB has silkscreen on the surface layer, and you’ll see a range of alphanumeric codes, numbers, markings, and logos on PCB silkscreen. What exactly does it all mean, and what specifically should you include in your silkscreen layer? All designs are different, but there are some common pieces of information that will appear in any silkscreen in order to aid assembly, testing, debug, and traceability
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What Causes Gibbs Ringing in High-speed Channel Simulations?
Designing high-speed channels on complex boards requires simulations, measurements on test boards, or both to ensure the design operates as you intend. Gibbs ringing is one of these effects that can occur when calculating a channel’s response using band-limited network parameters. Just as is the case in measurements, Gibbs ringing can occur in channel simulations due to the fact that network parameters are typically band-limited.
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Efficient Heat Dissipation with SMD Heat Sinks Keeps You From Dropping PCBs
In electronics, there is the possibility that your PCB can get pretty hot due to power dissipation in certain components. There are many things to consider when dealing with heat in your board, and it starts with determining power dissipation in your design during schematic capture. If you happen to be operating within safe limits in a high power device, you might need an SMD heat sink on certain components. Ultimately, this could save your components, your product, and even the operator.
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RF Power Supply Design and Layout Guide
One thing is certain: power supply designs can get much more complex than simply routing DC power lines to your components. RF power supply designs require special care to ensure they will function without transferring excessive noise between portions of the system, something that is made more difficult due to the high power levels involved. In addition to careful layout, circuitry needs to be designed such that the system provides highly efficient power conversion and delivery to each subsection of the system.
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Methods to Protect your Circuit
Overvoltage, overcurrent, and heat are the three most likely events that can destroy our expensive silicon-based components or reduce our product’s life expectancy. The effects are often quite instant, but our product might survive several months of chronic overstress before giving up the ghost in some cases. Without adequate protection, our circuit can be vulnerable to damage, so what should we do? Or do we need to do anything?
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SUBCKT Sharing: The Fastest Ways to Share SPICE Models Online
Today’s PCB designers and layout engineers often need to put on their simulation hat to learn more about the products they build. When you need to perform simulations, you need models for components, and simulation models often need to be shared with other team members at the project level or component level. What’s the best way for Altium Designer users to share this data? Read this article to learn more about sharing your models with other design participants.
On-Demand Webinar
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Designing PCBs 5x Faster Despite the Pandemic | Customer Success | Kinetic Vision
Kinetic Vision, a Cincinnati-based design, engineering, and development firm, is an innovator’s one-stop shop for transforming even the wildest ideas into real products. The company’s design approach keeps everything in-house, including industrial design, mechanical, and electrical design, as well as, engineering, hardware/software development, machine learning, and sometimes even short-run production. Watch this webinar to learn how Kinetic Vision uses the Altium 365 platform to enable a connected and frictionless PCB design experience, increasing their productivity 5 times even
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RF PCB Material Comparison for mmWave Devices
When some designers start talking materials, they probably default to FR4 laminates. The reality is there are many FR4 materials, each with relatively similar structure and a range of material property values. Designs on FR4 are quite different from those encountered at the low GHz range and mmWave frequencies. So what exactly changes at high frequencies, and what makes these materials different? To see just what makes a specific laminate useful as an RF PCB material, take a look at our guide below.
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The IEEE P370 Standard for High Speed PCB Interconnects
High speed PCB interconnects have continued to remain an active challenge in modeling and simulation, particularly when dealing with broadband signals. The IEEE P370 standard is a step towards addressing the challenges faced by many designers in determining broadband S-parameters for high speed structures up to 50 GHz. Although this standard has been in the works since 2015, it finally passed board approval and appears as an active draft standard.
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Class-D Amplifier Design and PCB Layout
Amplifiers can come in all shapes and sizes, depending on their bandwidth, power consumption, and many other factors. A Class-D amplifier design is normally used with high fidelity audio systems, and circuits for a Class-D amplifier are not too difficult to build in a schematic. If you’ve never worked with a Class-D amplifier or you’re looking for a fun audio project, follow along with this PCB layout.
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DDR5 vs. DDR6: Here's What to Expect in RAM Modules
Modern digital systems throw the digital electronics textbooks out the window, and high-speed DDR memories are a perfect example of the paradigm shift that occurs when you jump into IC and PCB design. With DDR5 still being finalized, and DDR6 now being discussed, designers who are already comfortable with DDR4 will need to consider how their design practices should adjust to accommodate the constant doubling of data speeds in these high-speed memory technologies.
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Making the Most of Your Crystal Oscillator
In my experience, the somewhat vague information you might find in a typical crystal datasheet doesn’t enable an engineer to be wholly confident that their design expectations can be met. On the other hand, “blindly” adopting what the crystal datasheet says usually results in adequate frequency stability. If you want to get inside and uncover what is going on, you need to start thinking about the crystal as a phase-shifting network.
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How Antipads Affect Signal Integrity in Your Multilayer PCB
Antipads on vias and landing pads are a point of contention in modern PCB design, and the debate around the use of these elements in a multilayer PCB is framed as a binary choice. Like thermal reliefs, ground plane splits, and orthogonal routing, the debate around antipads on landing pads and vias is framed as an always/never choice. With today’s modern PCBs, it pays to understand the effects of antipads on signal integrity.
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How to Design a Microstrip to Waveguide Transition
RF structures can be complicated to design and layout, particularly because many RF systems lead double lives as digital systems. Getting an analog signal out of a component and into a waveguide for high isolation routing is not so simple as placing a microstrip or stripline coming off your source component. Instead, you need to create a special microstrip to waveguide transition structure to ensure strong coupling into and out of your waveguide.
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Managing PCB Polygon Pour and Copper Features in Complex Layouts
Layouts for complex electrical systems may need to make extensive use of copper pour to provide ground nets, power nets, shielding, and other copper structures for power and signal integrity. Backplanes, motherboards, RF products, and many other complex layouts will make use of copper pour and polygons that can’t be easily placed as custom components. The rules-driven design engine in Altium Designer® also ensures that any PCB polygon pour you place in your PCB layout will comply with clearance rules and will be checked against other electrical design rules.
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High Speed Backplane Design and PCB Layout Tips
If you need to connect multiple boards into a larger system and provide interconnections between them, you’ll likely use a backplane to arrange these boards. Backplanes are advanced boards that borrow some elements from high speed design, mechanical design, high voltage/high current design, and even RF design. They carry their own set of standards that go beyond the reliability requirements in IPC.
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PCIe 5.0 Signal Integrity and Analysis
The upcoming Gen6 version of PCIe is pushing the limits of signal integrity for many computer systems designers. As with any high-speed signaling standard, signal integrity is a major design consideration, which requires the right set of design and analysis techniques. Rather than digging deep to find PCIe 5.0 signal integrity requirements from PCI-SIG, we’ve compiled the important points for today’s PCB layout engineers. Layout engineers should pay attention here as these design requirements will become more stringent in later PCIe generations.
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Top 4 Time Wasters in PCB Design Collaboration
An essential aspect of project management is time management, especially when your design team is working remotely. Your time management strategy is team-based and individual, but time can easily get spent on important tasks when working as part of a team. So how can you streamline important collaboration tasks for your design team to increase productivity?
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Sharing Inside and Outside Your Altium 365 Workspace
In these days of easily-available internet and quarantines, everyone is working remotely. It’s nice being able to spend time with family and regain control over your schedule, but keeping track of projects and revisions while securing user access feels like its own job. With the right set of project and data management tools, you can easily share your data with collaborators without tracking email chains.
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How Your Altium 365 Workspace Keeps You Organized
When I started using my Altium 365 Workspace for collaboration, I found I could make things run more smoothly when I kept things organized. However, I prevented any issues thanks to all the organization tools built into the Explorer panel within Altium Designer. Let’s take a look at how you can get the most value out of your Altium 365 Workspace in terms of organization and access management.
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How to Choose the Best PCB Manufacturer for Your Project
PCB manufacturing is competitive, and there is plenty of worldwide manufacturing capacity for new boards. If you’re looking for a manufacturer for your next project, it can be difficult to determine who is the best option to produce your board. Different fabricators and assemblers offer different levels of service, different capabilities, and access to different processes and materials. There are a lot of options to consider when selecting a manufacturer for your project.
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Getting Started with Revision Control in Altium 365
Ever since I started using Github and Google Docs, I fell in love with revision control. Instead of keeping multiple copies of essential files and time-stamping every revision, revision tracking information gets stored alongside the file. This environment works great for code, spreadsheets, and documents, and Altium brings these same features into PCB design.
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Image Processing Embedded Systems with Modular Hardware
With advances in industrial automation, automotive technology, remote sensing, and much more, image processing is taking center stage in many embedded systems. Image processing with older video systems was difficult or impossible due to the low quality of many imaging systems with perpetual uptime. Newer systems provide video with higher frame rates and higher resolution images, but these systems still needed to connect directly to a computer in order to enable any useful image processing applications.
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Any Angle Routing: When Should You Use It?
EDA tools have come a long way since the advent of personal computing. Now advanced routing features like auto-routers, interactive routing, length tuning, and pin-swapping are helping designers stay productive, especially as device and trace densities increase. Routing is normally restricted to 45-degree or right-angle turns with typical layout and routing tools, but more advanced PCB design software allows users to route at any angle they like. So which routing style should you use, and what are the advantages of any angle routing?
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