Timeline for Difference between negative terminal and copper ground?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Jul 17, 2019 at 17:50 | history | suggested | Qian Chen | CC BY-SA 4.0 | Fixed some typos. |
| Jul 17, 2019 at 17:27 | review | Suggested edits | |||
| S Jul 17, 2019 at 17:50 | |||||
| Jul 9, 2013 at 12:36 | vote | accept | learningtech | ||
| Dec 17, 2012 at 11:02 | comment | added | user16324 | An example of NPN circuits with a positive ground is ECL logic, where the collectors were connected to the positive terminal as you say, but that terminal was labelled 0V and was the ground reference. The emitters carried the logic levels, with resistors pulling them down to -5.5V. Emitter followers are extremely fast (no Miller capacitance) so ECL was the way supercomputers were built for at least a decade... | |
| Dec 17, 2012 at 3:46 | history | answered | Kaz | CC BY-SA 3.0 |