Z3 builders?

From: allisonp_at_world.std.com <(allisonp_at_world.std.com)>
Date: Fri Mar 5 15:41:18 1999

> It's large enough to make reliable flip-flops, n-state circuits, shift
> registers, etc quite possible...

True. It's problem is they are not consistant so yo have to design to a
narrower Vi, Ve. They also age and that set of numbers changes.

Neons are relitively slow devices.

> But a neon will do a lot more than a diode (well, maybe a tunnel diode
> will do some of the things a neon will do...). You can't make a flip-flop
> with just diodes, for example.

The use of both would be more practical as the diodes are desireable for
steering and gating logic but for bistable elements the neon would do ok.

Also a comment on older relay logic. When relays are used with relays
the problem of contact bounce is not a problem as they are slow enough to
NOT respond. You can also build a bistable using two simple relays rather
than a hard to find latching relay. Switching speeds are easily in the
several hundred hertz region though for combinational there will be
propagation delay.

Allison
Received on Fri Mar 05 1999 - 15:41:18 GMT