Timeline for BJT circuit with base emitter shorted
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 5, 2015 at 12:56 | vote | accept | K.Csaba | ||
| Oct 5, 2015 at 12:49 | comment | added | got trolled too much this week | One thing I did find is that the BVCER (collector to emitter voltage breakdown voltage with resistor between base and emitter) is maximized when this resistor is minimized. So that's why the base is shorted to the emitter. The base-emitter resistance is not zero though. | |
| Oct 5, 2015 at 12:40 | comment | added | user16324 | I wouldn't put it past Jim Williams to know something about where low-current breakdown starts in a specific transistor that makes this a pretty safe circuit for everyday use. However I'm with Andy : I wouldn't rely on it anywhere critical, and if I used it elsewhere I'd 100% test it in production, and look at the prototypes pretty closely across temperatures... | |
| Oct 5, 2015 at 12:07 | comment | added | Andy aka | @RespawnedFluff - that link is about reverse breakdown of base - emitter junction and not collector-emitter breakdown. | |
| Oct 5, 2015 at 12:04 | comment | added | got trolled too much this week | According to cr4.globalspec.com/thread/72501 the knee is even sharper than for a Zener. Possibly they wanted to use this effect? | |
| Oct 5, 2015 at 11:47 | history | answered | Andy aka | CC BY-SA 3.0 |