Timeline for Limiting current through Zener shunt reference by PNP current source
Current License: CC BY-SA 3.0
2 events
| when toggle format | what | by | license | comment | |
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| Aug 14, 2015 at 13:24 | comment | added | Dave Tweed | I agree. At 5V in, R2 is carrying only about 100 uA, about half of which is being supplied by the base of Q2, which means that Q1's collector current is only abut 50 uA. I think the whole thing would be more stable if R2 were reduced to 10K or less. | |
| Aug 14, 2015 at 12:46 | history | answered | Spehro 'speff' Pefhany | CC BY-SA 3.0 |