/diy/ - Do It Yourself

I had an idea for a digitally selectable component bank so that you can get a near-arbitrary component value by combining a bunch of different components in parallel or series. I've used resistors in the drawing, but I want it to work with capacitors and inductors as well. (this is supposed to be for a digitally tuneable radio antenna so I can change the resonant frequency without needing a variable capacitor)

Working out the design, it looks like I'm going to need a shitload of select pins. I don't think multiplexing would work (unless I attach some sort of hysteresis/capacitance to the gates) since that would essentially just be a variable load as the transistors turn on/off, which would fuck with the radio application.
And that's just for the serial transistor select. I still need to figure out how to combine the parallel and serial circuits so it's just one circuit with parallel/serial being selectable via another set of transistors (even more select pins)

does anyone more experienced than me have any insights into what I can do? Improvements?