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Eddie Carle - Tech Blog

Edmonton, Alberta, Canada
📧 eddie@isatec.ca
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Ten years of fastcgi++

April 10, 2016

It’s been about ten years since I started the fastcgi++ project and over these last couple months I’ve been thrust back into it and forced to reflect upon it’s development and usage. Doing a quick Google search reveals what I consider be to many misconceptions regarding the project, it’s motivations, it’s design choices, it’s status, and it’s future. I am writing this with the intention of addressing much of this and bringing to light some of softer non-technical realities of fastcgi++.

Talking to my Scopemeter

December 29, 2015

For some time now I’ve been meaning to write some simple software to pull data off of my Fluke ScopeMeter 199C. I tackle this by writing a simple python script to talk to the oscilloscope and query it’s measurement and waveform data. The code then generates pretty reports in both HTML/SVG and LaTeX/tikz.

Ceramic Filter SPICE Model

October 1, 2015

As part of a larger project I’m working on, I’ve found myself needing to use a ceramic filter on a 10.7 MHz IF (intermediate frequency) signal. Specifically, I’m using a Murata CERAFIL SFECF10M7GA00-R0 to provide 230 kHz of bandwidth in a ~40 dB IF amplifier. To test the design, I opted to do a SPICE simulation. Murata does not publish a SPICE model of their filters so I had to approximate one myself. This post discusses that model.