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On Mon, 11 Oct 2004 14:59:11 -0500, "Steve Nosko"
wrote: The Base-Emitter in a transistor is a semiconductor junction just like a diode and in the (higher power) RF amplifiers behaves pretty much like a diode. With RF applied to the base, there will be conduction on the positive peaks only and this will constitute a DC current flow which must have a DC path. The inductor provides such a path since the capacitor can not. Okay, Steve, I'm gonna have to take your explanation in bite-size chunks. Kindly indulge me... I don't see that the inductor is necessary to provide such a path to ground for the signal peaks, since they (the input signal pos. peaks) turn on the transistor and complete the circuit to ground via the base/emitter junction, which will be a low resistance path with sufficient base drive level on the peaks. Can you tell me why this path alone isn't good enough and there has to be an inductor across B/E as well? Thanks! Steve -- Fat, sugar, salt, beer: the four essentials for a healthy diet. |