Timeline for MOSFET symbol - direction of source terminal
Current License: CC BY-SA 4.0
21 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Aug 11, 2022 at 18:32 | comment | added | Mathieu Krisztian | @BrtH : ok thanks | |
| Aug 11, 2022 at 17:55 | comment | added | BrtH | @MathieuKrisztian the symbol in the fourth column (above the text 'no bulk') has it in the same style as you, on the source. They are not both correct, the image in this question is wrong. | |
| Aug 11, 2022 at 15:54 | comment | added | Mathieu Krisztian | @BrtH : it is not 100 % sure that you are right, because the arrow is not on the same position : for my schematic : it is on the source, while in your example, it is on the gate, so it is still possible than the two schematics would be both correct. What is your opinion ? | |
| Aug 4, 2022 at 12:09 | comment | added | BrtH | @MathieuKrisztian en.wikipedia.org/wiki/MOSFET#Circuit_symbols (i.imgur.com/qIjjKmc.png) | |
| Aug 3, 2022 at 12:58 | comment | added | Mathieu Krisztian | @BrtH : would you have a link on the web that shows the correct image for this, and stating that it is a PMOS ? | |
| Aug 2, 2022 at 16:49 | comment | added | BrtH | The image for 'PMOS with arrow' is not correct, the arrow should be pointing inwards. At the moment it is showing an upside-down NMOS. | |
| Aug 17, 2021 at 17:17 | history | edited | Mitu Raj | CC BY-SA 4.0 |
edited tags; edited title
|
| Aug 16, 2021 at 17:02 | comment | added | jsotola |
@MathieuKrisztian .... double dollar sign works in comments ... $$V_{GS}$$ ... $$V_{GS}$$
|
|
| Aug 16, 2021 at 16:47 | answer | added | user57037 | timeline score: 1 | |
| Aug 16, 2021 at 16:13 | vote | accept | Mathieu Krisztian | ||
| Aug 16, 2021 at 16:08 | comment | added | vir | Don't assume a convention such as "left = source" or "down = source". As @DaveTweed said, in these types of circuits, the source and drain are interchangeable, all you need to know for the analysis is that the device becomes a short (or open, for depletion mode) when activated. | |
| Aug 16, 2021 at 16:04 | answer | added | nanofarad | timeline score: 2 | |
| Aug 16, 2021 at 16:04 | answer | added | Elliot Alderson | timeline score: 4 | |
| Aug 16, 2021 at 16:02 | comment | added | Mathieu Krisztian | other example : courses.engr.illinois.edu/ece110/sp2021/content/courseNotes/… figure 2, 3, 4, 5 : no arrow written. So there should be a convention ? | |
| Aug 16, 2021 at 16:01 | comment | added | Mathieu Krisztian | example of wikipedia for logic circuit with NMOS : the source and drain are not written : en.wikipedia.org/wiki/NMOS_logic | |
| Aug 16, 2021 at 16:00 | comment | added | Mathieu Krisztian | The point is that depending on $V_{GS}$, the behaviour of a circuit schematic is not the same if we change S by D, so if it is not written, we should know where is the source. | |
| Aug 16, 2021 at 15:58 | comment | added | Dave Tweed | The source and drain are functionally interchangeable; the only reason an arrow is required is if the source is also tied to the substrate. So, the symbols with arrows are typically used for discrete transistors, where such a connection exists, and the symbols without arrows are typically used in IC schematics, where the substrate is connected to a common point on the chip. | |
| Aug 16, 2021 at 15:58 | comment | added | Elliot Alderson | Those symbols do not look like standard MOSFET symbols to me. The source and drain need to be clearly indicated in some way, do not assume "up or down". | |
| Aug 16, 2021 at 15:57 | comment | added | Mathieu Krisztian | see for example :circuitbread.com/tutorials/how-to-read-a-mosfet-symbol | |
| Aug 16, 2021 at 15:53 | comment | added | vir | The source should always be explicitly marked on the schematic symbol with an arrow that also shows the channel type. Where are you seeing these symbols? | |
| Aug 16, 2021 at 15:51 | history | asked | Mathieu Krisztian | CC BY-SA 4.0 |
