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October 2006
Photo Resolution and DPI
Tuesday, 31 October 2006 8:59 P GMT-06
I recently wanted to scan in some old family photos that were fading to preserve them. I became confused by the scanner software settings. The first confusing term is DPI. The software makes it sound like this is a measure of resolu
Category: Computers
Recent Communication Bus Statistics
Thursday, 19 October 2006 8:22 P GMT-06
The following table contains some statistics about digital communication busses that I have recently seen in designs, notably the bus length to bit period statistic that I have talked about in the past (the higher the bus length to bit period ratio,
Autism and Engineering
Thursday, 12 October 2006 7:58 P GMT-06
Autism is a disorder affecting a person's ability to communicate and socialize. I had known that the incidence rates of autism have been on the rise in recent years, especially since having children in the ages where it is usually diagnosed.&nb
Category: Engineering Profession
Switching Power Supply Frequency Response
Tuesday, 10 October 2006 8:00 P GMT-06
One aspect of power distribution system design that is not discussed in signal integrity books is how the system behaves at very low frequencies. Bulk capacitance is effective in the 100+ KHz to 1 MHz region, decoupling capacitance is effective
Category: High Speed Digital Design
Power Distribution System Impedance
Thursday, 5 October 2006 1:20 P GMT-06
One key to designing reliable and robust electronic products is the power distribution system. Power supplies in digital systems provide DC voltage sources to digital devices such as 3.3 V, 2.5 V, 5 V or whatever is needed. Digital device
Category: High Speed Digital Design
ECC Paper Featured on Cadence User Community Site
Thursday, 5 October 2006 5:13 A GMT-06
The ECC paper that I wrote and presented for Designcon 2006 (mentioned in ECC Papers Published blog entry) has been featured on the Cadence User Community this week. I was contacted a couple of months ago by Cadence for permission to feature th
Category: High Speed Digital Design