Friday, August 23rd
Off

Trace Routing for a 0.5mm Pitch BGA

Trace Routing for a 0.5mm Pitch BGA

Dog-bone routing is preferred as it is lower cost and less risk of soldering issues.  It also provides space for 0201 decoupling caps to be placed directly opposite the BGA pins.  You should be able to use a 6 mil via drill and route the signals on the inner layers using ~3.3 mil traces.  The trace can increase width or join a diff pair as soon as it exists the… Read More

Off

Measuring Structural Resonances – Part 2, Printed Wiring Board Traces (A Simple Technique for Determining the Resonant Frequencies of a PWB Trace)

Measuring Structural Resonances – Part 2, Printed Wiring Board Traces (A Simple Technique for Determining the Resonant Frequencies of a PWB Trace)

Figure 1. Measuring the Resonant Frequency of a PWB Trace Abstract: Using a shielded magnetic loop to measure the resonant frequencies of printed wiring board (PWB) traces can be a useful tool in scanning a PWB for potential problems as part of an overall evaluation of a board. A method of doing this along with an example are given. Discussion: Most traces on a printed wiring board should not be resonant, especially digital… Read More

Off

Measuring Structural Resonances in the Time Domain – Part 1

Measuring Structural Resonances in the Time Domain – Part 1

Figure 1. Experimental Setup with Parallel Plates and Connecting Wire   Abstract: Oscilloscopes are more common in most engineering labs than network analyzers or spectrum analyzers, so measurement methods that use oscilloscopes maximize the return on lab equipment for many companies. A method of measuring structural resonances using an inexpensive pulse generator and an oscilloscope is described and results are presented. Discussion: In the June 2006 Technical Tidbit, I described a method of using… Read More

Off

Common Circuit Design Flaws That Cause Operational Problems (problems fixed long ago are still showing up in designs)

Common Circuit Design Flaws That Cause Operational Problems (problems fixed long ago are still showing up in designs)

Figure 1. Circuit Board With Common Design Flaw Abstract: Common circuit design flaws at the board and system level cause many operational problems. Some of these flaws were understood and fixed years ago, yet still show up in designs. A few common problems of this type are discussed and examples given. Discussion: In my consulting work, I see a lot of operational problems in systems that are caused by common circuit design flaws.… Read More

Off

Reshoring of Printed Circuit Board Manufacturing

Reshoring of Printed Circuit Board Manufacturing

For many people, the words “Made in the USA” have become a rallying cry. In fact, a survey done in 2012 found that 83% of US citizens disapprove of companies that manufacture their goods overseas and they are interested in initiatives that strengthen the US manufacturing base*. Their wishes are finally being granted. The Reshoring Trend Reshoring is the return of manufacturing jobs to the US from countries such as… Read More

Off

PCB Creator Interview on Real Time with IPC

PCB Creator Interview on Real Time with IPC

At this years IPC-APEX show in San Diego we were interviewed by Kelly Dack with PCB007. We were able to talk about PCB Creator, our new PCB Design software. If you have not had a chance to give it a try be sure to check it out in action by Clicking Here. Below is the video as well as the transcript. Hi! Thanks for being with us I’m Kelly Dack for Real… Read More

Off

The Digispark Arduino Enabled USB Board

The Digispark Arduino Enabled USB Board

Digispark Digispark: I wanted to share with you a cool new product for the hobbyist and test engineers out there. Bay Area Circuits has had the privilege to be building the bare PCBs in this project. Many are familiar with the Arduino test chips used to make all kinds of little electronics projects. Erik Kettenburg over at Digispark thought there would be a better way to make use of these… Read More

Off

Embedded Magnetics Technology Overview

Embedded Magnetics Technology Overview

This is a blog post of a recent paper written by Jim Quilici.  Jim is an electrical engineer working on new technology uses for magnetics in electronics.  This is post is a recent paper Jim wrote for the IPC Apex show.  He is also a Bay Area Circuits customer. Jim Quilici Radial Electronics El Dorado Hills, Ca. Abstract — Inductors and transformers are basic building blocks in electronic systems. Their… Read More

Off

Rout and Fabrication of Printed Circuit Boards

Rout and Fabrication of Printed Circuit Boards

For the next in our PCB101 series we will be talking about the final fabrication on the board. Once we finished applying the board finishes mentioned in our last post in this series it is time to cut our rout out the individual boards. The boards can be routed out as individual small boards or they may be an array (multiple boards) still connected via tabs or score lines.  This… Read More

Off

PCB Protection Can be Compromised by Ground Structure

PCB Protection Can be Compromised by Ground Structure

This post is a guest post from Doug Smith.  Doug is an electrical engineer who trains other electrical engineers in EMC Design.  His website emcesd.com is a wealth of information.  We appreciate his contribution to our site. Figure 1. PCB Layout with Noise and Signal Ground Areas Abstract: Printed Circuit Board designers sometimes place protective devices on external signals as they enter a PCB and shunt the current from these devices to… Read More

Off

Can Ferrite Cores Increase Emissions

Can Ferrite Cores Increase Emissions

This post is a guest post from Doug Smith.  Doug is an electrical engineer who trains other electrical engineers in EMC Design.  His website emcesd.com is a wealth of information.  We appreciate his contribution to our site. If you have any comments or questions please post them below and we will have Doug answer them for you. Ferrite cores are often installed on cables to insert a common mode impedance.… Read More

RS274D vs RS274X Gerber file format

RS274D vs RS274X Gerber file format

Gerber File Extension For those that are not familiar with the Gerber file extension designation of rs274d vs rs274x we put together some basic information to help you understand the difference and why it is important in the PCB ordering and manufacturing process. How can just a letter make such a big difference? At first glance the “d” would seem like it would be better than the “x”. After all… Read More