W
whit3rd
Today we use LVD (low voltage differential) logic, at low voltage levels; before
that, there was HVD (RS-485), ECL, TTL, DTL, and a few odd items
like the high-voltage DTL of MC1488, and CML (current-mode
logic?) and such.
But 'WAY back there was a system with high power supply voltages
(about 450V) and very peculiar antenna-based sensing
<http://phenomena.nationalgeographic...ees-can-move-each-other-with-electric-fields/>
that, there was HVD (RS-485), ECL, TTL, DTL, and a few odd items
like the high-voltage DTL of MC1488, and CML (current-mode
logic?) and such.
But 'WAY back there was a system with high power supply voltages
(about 450V) and very peculiar antenna-based sensing
<http://phenomena.nationalgeographic...ees-can-move-each-other-with-electric-fields/>