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PCB Design
Chirped Automotive Radar Sensor Systems Design and Analysis
Thanks to the German inventor Christian Huelsmeyer, radar has been around since 1904, the year he patented his telemobiloscope. This simple radar device could detect ships up to 3000 m away and operated at wavelengths from 40-50 cm with a separate receiver antenna. The device could only be used to determine the presence of a distant object, but later versions could be used to calculate range. Today’s semi-autonomous vehicles, and upcoming fully
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Damping and Reflection Transfer with a Series Termination Resistor
Trace, source, and load impedance matching are important in boards that contain transmission lines. To reach these conditions, you may see some designs that use a series termination resistor on single-ended transmission lines. The reasoning for doing this is sometimes to slow down a signal, or sometimes to set the driver's output impedance, depending who you ask. As surprising as it might be, the placement of series resistors for termination are
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High Density Interconnects - A Design and Manufacturing Guidebook
A compilation of Happy Holden's expert advice on high density interconnect design, routing, layout, and manufacturing for HDI PCBs.
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Rules Verification in Agile PCB Design and Development
Agile development relies on a unique workflow that can benefit from PCB design rule verification I used to think that agile development is just a software development methodology with specific rules and processes. Agile hardware design processes seem to be rigid when viewed from the surface, but any agile design process is designed to allow a team to adapt to change throughout the product development cycle. In reality, the central ideas in agile
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Signal Integrity Simulations for Backplane Bus and Connectors
Modern embedded computing systems that interconnect a large number of modules in a single enclosure will probably need a backplane, and the buses connecting these systems run at multi-Gbps data rates. The connectors, PCB, and interfaces in total contribute to losses throughout the bus, and a system-level simulation will need to account for all of these elements to ensure a working design. As part of a design and verification flow, simulations are
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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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BOM Management and PCB Design Data Synchronization
Cloud-based tools for data management can keep your design and production data synchronized If you lead a design team, then your job is already difficult enough. Your design teams need to adhere to a development schedule and manage requirements changes as they create a new product. Collaboration is key in any environment with multiple players, and your design tools play an important role in creating a productive environment. Ensuring that all
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Embedded Optical Interconnects in PCBs for Ultra High Speed Design
Most PCB designers—except those that work on optical transceivers—are probably not aware of the coming revolution in silicon photonic integrated circuits (PICs), electronic-photonic integrated circuits (EPICs), and greater proliferation of embedded optical systems outside of telecom. Applications outside of telecom (for example, military and aerospace systems) that require massive data transfer rates already make use of fiber optics for embedded
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Agile Product Lifecycle Management Methods in PCB Design
Supercharge your productivity with agile product lifecycle management Any industry that relies heavily on new technologies must frequently reinvent itself and address product obsolescence. Every piece of technology has a finite lifecycle that ends due to obsolescence or malfunction. Electronics and the PCBs that support them are no different; components on PCBs eventually wear out and malfunction, or the product can no longer compete with a
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Landless Vias
One persistent myth is that PCB vias MUST have annular rings. I thought this for many years until our Japanese partners introduced us to landless vias. We said, “You can’t do that, the vias have to have lands!” They replied, “Try it out and test it?” So, we created a test vehicle and tested thousands of vias with various diameters against numerous annular ring vias. Guess what? They were right!! As the annular ring got smaller, the failures
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2:03
Has the Minimum Wrap at the Knee of the Hole Changed?
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1:29
Gerry Partida on Epoxy Filling for Heat Sinks
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1:36
How Does Epoxy Fill Affect Peel Strength?
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3:09
What Does "No Butt Joints" Mean?
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1:49
Gerry Partida on Multiple Wrap Plating
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58
Why Does Wrap Plating Increase Costs?
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