Recent content by haminous

chroot, ... ...thanks for the suggestion, but in this case it's specifically harmonic generation due to nonlinear effects that I'm interested in analyzing so an FIR wouldn't quite do it here. AlephZero, ... ...it's precisely those aliasing 'artifacts' that I would like to avoid for exactly...

So I've been having a bit of fun with FFT's of some nonlinear functions applied to sine waves and I noticed 'reflection' of the harmonics due to generation of frequencies beyond the Nyquist frequency. This comes as no surprise, but it left me wondering how one might model nonlinear systems...

Interesting. It might be fun to try to implement with tubes just for kicks someday. I need a healthy amount of gain, but a just a flat, wide response. I think I may have found my error with the graph, but I haven't sat down to work out the math yet. Thanks for all the advice

Hmmm..OK. Thanks for the input. So, just out of curiosity, what about a cascode configuration? Would be the advantages and disadvantages?

Thanks for your suggestions, vk6kro. I am indeed interfacing with a low impedance source, probably in the range of tens to hundreds of ohms with not much power, so I am trying to design a preamp utilizing the maximum power transfer theorem. Interestingly, you noted that a low impedance input...

Greetings. I am trying to understand the common base amplifier better so I can build a preamp for a low impedance guitar pickup. In order to explore its operation, I tried to model it with the "approximated" Ebers-Moll model (from the wikipedia page on BJT's) and the graphing program in Mac OSX...