Timeline for Phototransistor bandwidth issue
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 15, 2014 at 14:20 | history | edited | ythey | CC BY-SA 3.0 |
schematic
|
| Dec 15, 2014 at 9:47 | vote | accept | ythey | ||
| Dec 12, 2014 at 4:18 | comment | added | George Herold | Re light level, OK I perhaps shouldn't have commented. I don't know photo-transistors... (the only time I looked photo-diodes were better.. more area, photons.) | |
| Dec 11, 2014 at 22:38 | comment | added | ythey | Supply is not an option. Reducing resistors was my primary solution, and it worked; however, DC is relatively low, %33. Contradiction to what you say, increasing the distance, meaning less light I think also improves propagation delay. I finally make R2&R3 1.1k. How much are they decreased, and what may be the effects? @GeorgeHerold | |
| Dec 11, 2014 at 17:41 | comment | added | George Herold | I've hardly ever used a photo-transistor, But for more speed I'd want more light and less resistance... (reduce R2/ R3 maybe) A bigger supply voltage may help also. | |
| Dec 11, 2014 at 15:38 | answer | added | Andy aka | timeline score: 1 | |
| Dec 11, 2014 at 15:29 | history | asked | ythey | CC BY-SA 3.0 |