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The Pulse: Tangential Thoughts--Loss Tangent Values
Numbers are fascinating things, and the way they are presented can influence our thinking far more than we would like to admit, with $15.99 seeming like a much better deal than $16. Likewise, a salary of $60,000 sounds better than one of $0.061 million, even though the latter is a larger number. Our brain has been programmed to suppress the importance of numbers to the right of the decimal point. Such is the case with the loss tangent of materials. It is a tiny number and so to our minds looks insignificant, but it has a directly proportional effect on the energy loss suffered by a dielectric.















  

HDI: Today, Tomorrow and the Future
For the November issue of The PCB Magazine, our editorial team interviewed some of the top HDI experts in the PCB supply chain. Joining us on the conference call were Steve Bird, PCB/flex technology manager at Finisar, and Tony Torres of APCT.

I-Connect007 Launches The Printed Designer's Guide to… Power Integrity by Example - Written by Fadi Deek of Mentor, A Siemens Business, this new micro eBook investigates power distribution network performance. This book is a follow-up to Deek’s previous book on signal integrity, which is also available in our eBook library. Deek addresses problematic issues within electronic transmissions, and presents a variety of simulations and analyses in every chapter. Readers will gain a better understanding of cause-effect relationships between varying factors and how to consider these when making design decisions.Download free today!

 

Beyond Design: When Do Traces Become Transmission Lines?
At low frequencies, traces and components on a PCB behave simply as lossless lumped elements—as taught in Circuit Theory 101. But as the frequency increases, the copper trace and adjacent dielectric(s) become a transmission line, the skin effect forces current into the outer regions of the conductor and frequency dependant losses impact on the quality of the signal. The PCB trace now behaves as a distributed system with parasitic inductance and capacitance characterized by delay and scattered reflections. The behavior we are now concerned about occurs in the frequency domain rather than the familiar time domain. This is the real world of high-speed design.

  


Who Really owns the PCB Layout?
In order to understand the current climate, we have to look at the division of labor that took place in electronic design about 40 years ago. The labor was divided into two processes, with the first being the design itself. This process was (and still is) owned by the electrical engineers. Though circuit design has changed, the methods for representing the circuit have not. Paul Taubman of Nine Dot Connects explains.

 

Design News & Additional Information


Register for Nine Dot Connects' December 20 Webinar: Spelunking in the Altium Schematic Preferences, Part 2
In November Nine Dot Connects began their exploration of the Altium Designer schematics preferences. This included a thorough look at the general, grids, break wire and default units pages.


Ventec Proudly Supports 'Skate for the 22' Foundation
Ventec International Group is proud to support the "Skate for the 22" Eagles vs. Boston Bruins Alumni hockey game on December 17 at the Edge Sports Center in Bedford, Massachusetts.


CadenceAllegro Pulse Extends Team Collaboration
CadenceAllegro Pulse is the PCB industry’s first solution to enable extended team collaboration by providing near-real-time insights into the complexities of the electronic design process. Allegro Pulse connects management, engineering, procurement and other business stakeholders to up-to-date work-in-progress design data in a single, unified web-based platform.


Ucamco Upgrades Gerber Format Specification Manual
Ucamco has released version 2017.11 of the Gerber format specification and version 2017.10 of the proposal to include fabrication documentation in the Gerber format.

For all the latest Printed Circuit Board Design news and information, go to PCBDesign007 right now!



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