Timeline for What is the symbol for this very site? What type of diode?
Current License: CC BY-SA 4.0
8 events
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| May 30, 2020 at 8:38 | comment | added | rackandboneman | Also, I think some 1980s schematics (japanese?) did use circles around diodes to indicate LEDs as opposed to other diodes.... | |
| May 29, 2020 at 9:31 | comment | added | Peter Smith | Many years ago, the circle was used to denote a discrete device. Symbols without them were part of an integrated circuit so when looking at the circuit of a TTL part (to understand how it operated, which is still a good idea) there were no circles. This was almost universal in the 70s and early 80s but slowly fell out of use when ICs started to simply show an equivalent circuit in the datasheets (and designers couldn't be bothered to draw a circle that started to have no real meaning). | |
| May 29, 2020 at 9:02 | comment | added | fraxinus | In a rather informal convention, a circle around the element means a discrete element, no circle means it is a part of an integrated circuit. Transistors are for sure drawn like this and the circle means packaging. One can see a Darlington transistor to be drawn with a circle around both transistors. | |
| May 29, 2020 at 3:49 | comment | added | stib | is the unfilled triangle significant? | |
| May 28, 2020 at 23:20 | history | edited | JYelton | CC BY-SA 4.0 |
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| May 28, 2020 at 22:16 | comment | added | Aaron | @ThePhoton That's interesting! Do you have a link you can share? | |
| May 28, 2020 at 20:27 | comment | added | The Photon | I've seen some styles that call for the circle to indicate a "real" device where the uncircled version is an ideal device. | |
| May 28, 2020 at 19:12 | history | answered | Aaron | CC BY-SA 4.0 |