So, as a total newbie to JFETs (and basically electronics as a whole), I'm trying to design something akin to a Cloud Lifter - a device used to pre-amplify a dynamic microphone's signal to a decent level before the proper preamp stage. It uses 48V phantom power to power the circuit. I believe Phantom power is usually fed via 6.81k resistors to both the hot and cold signal wires to the microphone. In this case, that 48V isn't usually needed for a dynamic mic, but is instead used to power the JFETs in the circuit.
Pic 1 is my circuit.
Pic 2 is simplified circuit.
Pic 3 is also the same simplified circuit but different arrangement.
*Topologies are the same, just arranged differently so you can see how it's all connected.My question is this: How on Earth does it work to amplify the signal?
I can't for the life of me figure out where the gain comes from.
I can't find anything online where people have JFETs in this configuration. i.e. "Back-to-back", or I guess a kind of Darlington Pair but with the power connected to different terminals...
Apologies for such a newbie question, but if anyone could point me in the direction of good resources for JFETs, I'd very much appreciate it! Cheers.
P.S. Pics 4 and 5 are the generated outputs of the TINA-TI simulation. It seems to work, but I'm going to order some JFETs in the meantime so I can make up a PCB in a week or two.