Transistors, Anyone?
I don’t think the following questions are quite addressed but anyhow…. “Would you please tell me what transistors do and how they do so? What is the difference between PNP and NPN transistors? What is the concept of using a transistor as a switch? Thanks a lot.” (From: Gareth Alun Evans (gareth@cemetery.demon.co.uk).) A transistor is rather like the human alimentary canal, after the typical USA diet of burgers and chips; – it constipates, as do semiconductor diodes with no appled bias – the available holes get filled in and nothing can move. The base current is like a small application of laxative; some of the constipation passes through, until the effect of the laxative wears off. The total throughput depends upon the Mobility. By applying a continuous feed of laxative, then a continuous current passes through. Applying too much laxative results in saturation – i.e., there is a limit to the maximum throughput, depending on the external circuit; in this case, the maximum rate at whic
