On 2022-Apr-01, at 5:54 AM, Paul Koning via cctalk wrote:
On Apr 1,
2022, at 2:56 AM, Mark Huffstutter via cctalk <cctalk at classiccmp.org> wrote:
That Corning document is also interesting because of its comparison of memory
technologies it shows. Tunnel diode memories? Hm. And cryogenic, in 1962? Hm again.
Are you alluding to a question of actual use in a practical large-scale implementation?
Tunnel diodes did work as storage (state-holding elements), at least on a small scale. I
have a frequency counter that uses a 5-stage tunnel-diode counter for the first high-speed
counting stage. That is the most tunnel diodes I've seen in use in one place.
As two-terminal negative-resistance devices, I wonder if there were some design attempts
to put them in a matrix, something along the lines of providing the matrix axes in whole
with a 'holding current' to retain state, along with 2D addressed R/W.
Cryotrons I only know of from reading the period 'laboratory announcements',
don't know how far they got in any practical use.