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February Issue 











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Table of Contents
Innovation in Wireless Techonology inside February's Issue
Share your Hot Idea During the DesignSpark chipKITTM Challenge
Win an Analog Devices's ADuC841 QuickStart Development System
Save 15% on Microprocessor Design Using Verilog HDL by Monte Dalrymple
From the Archives - Embedded IP-PBX Switch Analog and VoIP Calls



Innovation in Wireless Technology inside February's Issue 


Wireless technology is everywhere and has come a long way since we first published articles about it back in 1988. The topic of wireless technology is further explored in the February issue of Circuit Cellar


In this issue Steve Lubbers describes how to build his "KartTracker," which is a standalone GPS-based timing system. The LCD on the system's development board operates as the user interface, an integrated accelerometer records G forces, a serial port provides connections to a GPS receiver and a wireless transmitter, and removable flash memory stores data.  


You will also find Ed Nisley tackling the topics of capacitor self-resonance, GPS technology, RF energy, and data transmission in the first part of his series titled "RFI Bypassing." To read these articles and more visit to download your digital issue.   



Microchip November 2011


Share your Hot Idea During the DesignSpark chipKITTM Challenge

DesignSpark chipKIT Challenge logoThis competition is open to anyone who wants to develop with a chipKITTM Max32TM development board. Don't forget to keep the community updated on the progress of your project. There have been fantastic arrays of projects submitted, so make sure yours stands out! Here are some tips to make your design more appealing to the community and really wow the judges: 


  • Select a category that best fits your project
  • Update your project regularly by editing your project's detail or making a comment on your progress
  • Include images and videos via the image or the video filter
  • Engage with other contestants

For more entry tips visit:

If you get stuck with an element in your design, why not ask the community for help? Visit the ASK section to post a question or e-mail us at   

Register before time runs out at!   





Win an Analog Devices's ADuC841 QuickStart Development System with the Purchase of Shlomo Engelberg's New Book!  

In ADuC841 Microcontroller Design Manual: From Microcontroller Theory to Design Projects, Shlomo Engelberg presents a comprehensive guide to designing and programming with the Analog Devices ADuC841 microcontroller and other microcontrollers in the 8051 family.


Twelve lucky readers will be selected to receive a free Analog Devices ADuC841 QuickStart development system. If you would like to be entered into the random prize drawing, click here to read the terms and conditions and then enter Coupon Code KITDRAW2012 at checkout. Don't delay. Enter to win before February 29, 2012!



Save 15% on Microprocessor Design Using Verilog HDL by Monte Dalrymple

With the information from this book, designing a microprocessor can be easy! Monte Dalrymple has taken his years of experience designing embedded architecture and microprocessors and compiled his knowledge into one all-inclusive guide to processor design in the real world.

Monte demonstrates how Verilog hardware description language (HDL) enables you to depict, simulate, and synthesize an electronic design, therefore increasing productivity by reducing workload with any given project.

Purchase this book before March 15, 2012, and save 15% off the cover price!

To purchase these books and more, visit the CC-Webshop today!  



As SuperSpeed USB adoption gains momentum, USB developers must quickly upgrade their protocol test equipment to address the new 5-Gbps signaling scheme. A key consideration when evaluating protocol analyzers is the accuracy of the analog front on the equipment. All SuperSpeed 3.0 analyzers rely on PHY silicon to perform the critical role of LFPS detection and data deserialization.  There are two basic approaches to designing the analyzers data recovery circuitry.  Some USB 3.0 analyzers use dedicated SuperSpeed PIPE PHYs while others rely on general purpose deserializer components.
The main limitation when considering test equipment that uses USB 3.0 PIPE PHYs, like the Texas Instruments TUSB1310, is that the PIPE interface on this chip does not preserve the 10-bit symbols on the bus. This PHY converts the data stream to 8-bit patterns before transferring to the analyzer logic.  In the process, it discards the original 10-bit patterns including running disparity. Without the running disparity information, it becomes impossible to accurately recreate the 10b code, especially when an invalid 10 bit symbol is received. Read why 10 bits are better than 8 bits in this new technical brief.

While the TI PIPE PHY can indicate receipt of an invalid 10-bit code, it cannot identify which 10b code was received. Also, a PIPE PHY can indicate a running disparity error, but cannot identify the disparity value that was received or the previous symbol's running disparity.

From the Archives - Embedded IP-PBX Switch Analog and VoIP Calls

In this article, David Rowe describes the design of a μClinux-powered IP-PBX capable of switching both analog and VoIP calls. With an Analog Devices Blackfin processor, some custom hardware, and Asterisk PBX software, you can build a similar system.  To read the complete article, please click here.


News Notes is a monthly e-mail newsletter created for the hands-on embedded design engineers who read Circuit Cellar magazine. News Notes also serves as a notification to Digital 2.0 and Combo 2.0 subscribers that monthly issue PDFs are available.