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January 2009
Loose vs. Tight Coupling for Differential Pairs
Thursday, 15 January 2009 10:52 P GMT-06
Based on the influence of some signal integrity experts and my own intuition and simulation experience over the years in signal integrity, I am convinced that loosely coupled differential routing is usually the preferred method for routing differenti
Category: High Speed Digital Design
Article One Partners Patent Review
Wednesday, 14 January 2009 9:02 P GMT-06
About a year and half ago I wrote an article about a new organization called PeerToPatent , dedicated to reviewing patent applications for prior art in the software industry to help improve the quality if patents. This site opened up patent ap
Category: Engineering Profession
History of Transatlantic Cables
Tuesday, 13 January 2009 9:03 P GMT-06
One of the most interesting articles for me in the IEEE Communications magazine last year was about the history of transatlantic cables [1]. The article was written to commemorate the 150th anniversary of the first telegraph transmission across
Category: Digital System Architecture
Low Cost 12 GHz Sampling Oscilloscope
Sunday, 11 January 2009 8:41 P GMT-06
Verification and testing of high speed digital designs requires a lot of expensive test equipment. To design with 5.0 Gbps technologies such as PCI-E 2.0, a design team would need to have access to a 20 GHz TDR with advanced S-parameter softwar
Category: High Speed Digital Design
Package Design for Signal Integrity
Sunday, 11 January 2009 8:04 P GMT-06
I have been doing some research into signal integrity design for electronic packages.Tool VendorsApache Design Solutions - PakSi-E - This tool does 3D field solution for package designs.Supports extraction from Cadence Allegro, Encore BGA, Mentor Gr
Category: High Speed Digital Design
Ansoft HFSS Forum
Thursday, 8 January 2009 9:09 P GMT-06
Ansoft HFSS is a very powerful 3D field solver tool. It is a general purpose field solver tool that can be used for any electromagnetic field application. It is used in signal integrity design for simulating and optimizing transmission c
Category: High Speed Digital Design
Hubdub Results 7
Saturday, 3 January 2009 4:46 P GMT-06
My previous cumulative results for Hubdub predictive markets was 15-10-2 (correct-wrong-draw). Here are some more predictive market results from Hubdub.com for bets that I have participated in.Will GM and Chrysler be announced to merge before
Category: Predictive Markets
My Toaster Reflow Oven Project - Part 2
Thursday, 1 January 2009 11:46 P GMT-06
This is a continuation of my toaster reflow oven project. I disassembled my toaster oven project and moved the controller away from the oven to test the theory that it was overheating. I monitored the temperature at the controller and at variou
Category: Electronics Hobby