3 ms·
I think problem in high frequency ternary isn't primarily transistors but interconnection. When using voltage levels like -1, 0, 1 on one wire, switching from -
by rini17 6y ago
I think problem in high frequency ternary isn't primarily transistors but interconnection. When using voltage levels like -1, 0, 1 on one wire, switching from -1 to 1 goes through 0 briefly and you need to guard against that. Binary does not have this problem. Using two wires (which take up 2x space) introduces intermediate states instead by timing differences between individual wires. This case is ubiquitous problem also in binary, called hazards. There are various solutions, like gray code (only one wire changes at a time) but they increase complexity.
Perhaaaaps if we had photonics with polarization signalling in 3 axes....
- drran 6y agoMaybe we should use phase instead of voltage level. For terahertz computations we will need completely different physics anyway. For example, p-p-p can encode 0, p--p-p — +1, p-p--p — -1, where p is pulse.
- sitkack 6y agoI believe Japan produced some computers that ran on phase. Late 50s-60s. Please correct me.
- sitkack 6y agoYou are correct, https://en.wikipedia.org/wiki/Parametron https://en.wikipedia.org/wiki/Parametron http://museum.ipsj.or.jp/en/computer/dawn/0007.html http://museum.ipsj.or.jp/en/computer/dawn/0007.html
- drran 6y agoLooks too good to be true: https://en.wikipedia.org/wiki/Rapid_single_flux_quantum https://en.wikipedia.org/wiki/Rapid_single_flux_quantum