In article <7v1k7ffip...@mid.individual.net>, David Lord <sn...@lordynet.org> wrote:
> unruh wrote: > > On 2010-03-01, Kelsey Cummings <k...@microshaft.org> wrote: > >> David J Taylor wrote: > >> ... > >>> I would knock something up if there were enough interest, but it would > >>> be a Windows program so of limited interest to the OP. > >> That's the idea anyway. At the time, I was convinced the PPS signal was > >> showing clearly and it was but with the led transistor in backwards the > >> PPS line was getting pulled down to 1.4v or thereabouts. Not enough for > > > > Hard to know how it would do that. > > Transistor inserted with reversed C/E have low Vce breakdown, > very low gain and possibly higher Vce_sat. They still operate > as transistors and long time ago I've used in that mode but I > can't remember what that was for (not so long after red spot > or white spot transistors were sold in a box of one which cost > a quid = eight weeks pocket money). Inverted bipolar transistors were widely used as choppers (in synchronous detectors), as the offset is lower in that configuration. Joe Gwinn _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
