For other models, a slightly different factor might apply.Ĭhanging IS accordingly, however, is not a particularly good idea as this parameter affects not only the leakage currents of both junctions, but also the 'Ie vs. The specified maximum is about 2.5 times the average leakage current for all temperatures. For the AC128, the maximum values of the collector-base leakage current can indeed be found in the Valvo datasheet minimum values are not specified, though. I've made a few heuristical studies in this direction. In a 9V world there may be little need to specify a reverse Early voltage but that's not hard. I think if it matters to your designs you need to measure the devices you can get and work them into *your* copy of the model. And as the processes improved a given device may have different actual parameters in different eras. Such techniques give no or some control of the two junctions.Īnd since the "reverse" properties were rarely interesting, they were not specified (don't promise more than the customer demands). Another is to put two P pills on a slice of N and bake the whole thing until it almost diffuses-through. Then saw between alternate N stripes so you get P-N-P slices. One is to pull a crystal from the melt while alternating N and P dopants so you get a zebra-stripe sausage. Not that it is is material related, but "all" Silicon will have refined junction processing, heavier on Collector.īack in the beginning there were several crude ways to make transistors, and some of them made Collectors and Emitters the same.
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