Transistors 101: Identifying an unknown transistor
ฝัง
- เผยแพร่เมื่อ 29 ก.ย. 2024
- We discuss how BJT's perform out of circuit, and how to identify an unknown BJT.
00:11 Intro
00:43 BJT's when out of a circuit
02:05 Identifying an unknown pair of BJT's
05:15 Did we get it right?
05:53 Conclusion
Music:
"Light Sting" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
creativecommons...
The engineer of that pinout woke up in the morning and chose violence.
The dual transistors all seem to come in strange pinouts. DMMT5401 and its complementary partner, DMMT5551, even have more than one choice for them, both peculiar. www.diodes.com/assets/Datasheets/ds30436.pdf
It's actually not horrible for layout. Common emitter (as for a differential pair or exponential converter) and common base (as for a current mirror) both put the connected pads right next to one another.
@@KludgesFromKevinsCave Mmm. True. That makes sense for a current mirror layout. I see onsemi has a different layout that is EBC EBC, but the EBC on each side do not all belong to the same transistor (which is also confusing to me in a different way). For me, it would make sense to just have each side be EBC or CBE for each transistor, both for most layouts and conceptually, but that's just me. No doubt there's a reason not to do this on the die.
Bye Bye.(Just like me)
Ok, here's a like. Bye!
Excellent tutorial. It is may be worthwhile to recognise that the difference of diode forward voltage drops is of the order of 2.5%, i.e. neither very significant nor insignificant.
Hmm. I suppose. I think the important point is that the difference is always there, so you can tell emitter from collector that way. Sometimes at the bench it's quicker to use a multimeter than look up the data sheet for the transistor.
@@KludgesFromKevinsCave True
Спасибо!
Очень плзнавательный ролик!
Very good
Glad you liked!