John Watson on Available Resources to Keep up to date

Created: January 17, 2019
Updated: March 16, 2020

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4-layer circuit board stackup

Two Alternative 4 Layer PCB Stackups With 50 Ohms Impedance Need a 4-layer PCB stackup that can support high speed components on both sides of the board? Consider these alternatives to the typical 4-layer stackup. Read Article

Finger touching screen

Design to Manufacturing with a Single Mouse Click Imagine if you could design your circuit board, run simulations, source your parts, generate an accurate BOM, generate your output files and simply press a “send to manufacturing” button all within your design environment? While that may sound like a far-off dream, this interview with Misha Govshteyn from Macrofab will give you insight into how they are partnering with Altium to make this dream a reality very soon. Judy Warner: Misha, please Read Article

microstrip to ground clearance

Microstrip Ground Clearance Part 2: How Clearance Affects Losses In a previous article, I provided a discussion and some simulation results on the necessary clearance between impedance controlled traces and nearby grounded copper pour. What we found was that, once the spacing between the pour and the trace becomes too small, the trace becomes an impedance-controlled coplanar waveguide (with or without ground). We also saw that the 3W rule for the spacing between the trace and the grounded copper pour is a bit Read Article

Differential Pairs and Differential Signals

What Are Differential Pairs and Differential Signals? Differential pairs and differential signals are the mainstay of high speed digital communication and data transfer. Read Article

what is signal integrity

What is Signal Integrity? Learn about the basics of signal integrity and how you can ensure your PCB layout complies with best practices for signal integrity. Read Article

MCAD CoDesigner - Rejection Comments

MCAD CoDesigner - Rejection Comments MCAD CoDesigner now displays the complete history of accepted and rejected changes, along with any comments the engineer has entered if a change is rejected. The history of changes is shown in MCAD CoDesigner's panel, making the interaction between the electrical and mechanical engineers more transparent. As soon as changes are applied/rejected on one side, the engineer on the other side is notified, and any rejection comments are displayed Read Article

ISM Bands Around the World

ISM Bands Around the World ISM bands (industrial, scientific, and medical) are parts of the RF (radio-frequency) spectrum reserved for general use by, as the name suggests, scientific, medical, and industrial devices. Their creation was in response to specific demands by these industries for access to the RF spectrum to perform functions without having to compete with the traditionally intensive users of RF, the communications, and defense sectors. The critical thing to Read Article

Project History in Altium 365

Project History in Altium 365 Altium 365’s Project History shows changes to the project's documents and the timeline since the project was launched. Read Article

Interactive Commenting in Altium 365

Interactive Commenting in Altium 365 With Altium 365 Interactive Commenting, your comments provide you instant access and complete visibility to any design changes, so your explanations are all in one place. Read Article

ESD Protection Circuit Design

Beginner’s Guide to ESD Protection Circuit Design for PCBs Circuit protection from transient voltages and currents can be applied with ESD protection circuit designs. Learn more about these circuits in our guide for new engineers. Read Article

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