darenager wrote:Hmm could be analogue realised using FPGA devices
http://en.wikipedia.org/wiki/Field-programmable_gate_arrayUnlikely - FPGAs are Gate Arrays. The magic thing about digital is that you can reduce any digital design to a series of NAND gates. So if you have a large array of NAND gates you just need to be able to modify their interconnection to build any desired digital circuit.
There isn't a universal analog circuit element that allows you to emulate any other. Capacitors, resistors, transistors and the rest are all unique devices. Even though transistors are theoretically similar devices among themselves the actual behavior of different transistors plays a significant role in the design of an analog circuit.
Elektron's best bet would be to build low-voltage, low-current devices with the smallest SMD parts possible. The JoMoX T-Resonator does this with its filters on tiny little daughterboards.