5
Early in my career, I switched from microwave and RF de-
sign to computer design. When this happened, I was privileged
to work with two very good engineers at Amdahl Corporation,
Dan Murphy and John Zasio.
With Dan, I later founded a design company known as
Shared Resources. Dan was a great router developer and we used
his skills to put together a design company and a PCB router
that set the standards for how to route high speed PCBs. Many
of the features in today’s PCB routers came from the work that
Dan did. He made it possible for Shared Resources to design
PCBs that could not be attempted with any of the then available
design tools. Many of the design concepts in this book came
from the work we did designing hundreds of high speed PCBs.
With John, I was able to work on many high-speed designs
and to see how he performed analysis of some fairly complex
problems. He has always had a design and analytical discipline
that stands out among all the engineers I have known and with
whom I have worked. I could always count on him to put to-
gether good analyses and to perform measurements with the
rigor necessary to prove concepts in a conclusive way. He has
been working at engineering since the early sixties and is still
actively working on new and more complex designs. Whenever
I needed a reliable ear to explore an idea, John has been there.
For this book, he did the lab experiments that support the state-
ments about bypass capacitors and he also wrote the section on
that topic. We still fi nd new things to explore.
In the fall of 1989, I was writing design articles for the early
version of Printed Circuit Design magazine. A new editor came
on the scene who did major damage to the articles I submitted.
Some of them were sent back to me with so much red ink, it
looked as though someone had been slain on them. This editor
was Kella Knack who had come from Martin Marrietta where
RIGHT THE FIRST TIME
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