3 Feb
2023
3 Feb
'23
2:41 p.m.
On 02/03/2023 8:25 AM CST Paul Koning via cctalk
<cctalk(a)classiccmp.org> wrote:
It's puzzling that temperature would matter.
Obviously, when you hit the Curie temperature the data goes away, but for typical magnetic
materials that is in the hundreds of degrees. Does the hysteresis curve shift enough at
moderate temperatures (a bit over room temperature) to matter?
paul
Yes. The thresholds shift with temperature. Some companines (DEC?) used
temperature-compensated amplifiers to address the issue. IBM, on some models like the
1620, kept the cores at a constant (elevated) temperature.
https://en.wikipedia.org/wiki/Magnetic-core_memory#Physical_characteristics
Will
I do not think you can name many great inventions that have been made by married men.
Nikola Tesla