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Address technical questions and general correspondence to:

info03@sigcon.com

Dr. Johnson receives literally thousands of requests for technical information annually. While he cannot guarantee a timely response to every inquiry, he does his best, time permitting, to respond to technical questions.

HSDD Newsletter

The High-Speed Digital Design: Black Magic Newsletter originally evolved as a Q & A forum for students of Dr. Johnson's seminars. Now open to everybody, at present about 10,000 people regularly subscribe to this pithy missive. If you like to read about other people's SI challenges and stories, sign up for our newsletter here:

This list has a privacy policy.

The HSDD newsletter is a moderated forum. You will receive only a few issues annually, and only from us here at Signal Consulting. We will not flood your mailbox with junk. Each issue investigates an issue related to a recent question, and includes a thoughtful answer.

Newsletter articles range deeper, and run longer, than is permitted in the confines of the single-page magazine editorials Dr. Johnson writes for EDN. Here's an example: Charge Unleashed.

Newsletters usually include brief announcements about upcoming public events.

SI Mailing List

This is an "open-mike" email reflector dealing with high-speed digital design issues. Last time I checked, it was still administered by the very capable Ray Anderson at Xilinx.

The topics are excellent, but prepare yourself for a deluge of low-information-density messages. These links may help: