Bell System 1922 "computer logic" 4268

In grad school I learned a lesson from Dr Science: How to attack others where I myself an the weakest.

I count myself as a young student of the clever things that can be done with relays.

There is a thin line between ignorance and arrogance; I have erased that line!

In reality the techniques of relay logic (especially the bidirectionality of transmission in a relay contact which is essential for an iterative network) can in fact be done in solid state logic - there's this handy device called the "bilateral gate". Available in single-pole and double-pole in SSI form.

But rarely used for digital logic, in fact almost all examples of bilateral CMOS switches show them being used for analog (not digital) switching. (There is ONE example from a early 70's RCA databook that shows a CMOS bilateral switch being used as essentially a relay contact in an iterative network, but it is unaccompanied by any descriptive text.)

It is possible that the techniques of iterative networks are completely forgotten today. I only found out about them by reading a book coauthored by the FATHER of a well-respected Bell Labs a.f.c interloper! Google searches (which are not the end of the world) do not turn up any good descriptions of these iterative networks - there are indexes to course sylabi from decades ago but otherwise every reference to "iterative networks" is talking about something completely different.

I should remedy the "doesn't appear anywhere in Google" by writing a summary-perspective on iterative networks (with references to Caldwell and Keister-Ritchie-Washburn).

Tim.