18 Jun
2011
18 Jun
'11
5:20 p.m.
On 18 Jun 2011 at 15:38, Brent Hilpert wrote:
I have early calculators where flip-flops are built
from a single
physical OR gate. The output feeds back to one input so the gate will
latch-up on itself.
I've seen that done with CMOS logic as well.
Or a neon lamp, biased just below firimg, with the trigger
capacitively coupled in. (I believe there were also some 3-lead neon
lamps (wire-lead) where the third electrode could be used for
triggering).
Whatever happened to AC-coupled (pulse) logic anyway?
--Chuck