For a project I'm starting, I am trying to create an array of silicon photomultipliers (start small, 4 or 6) which can be connected to one channel, and when they fire, you can detect which photomultiplier fired. I apologize, but I never designed anything like this before, so perhaps my description might be too abstract.
In a sense, this is a step-up from my previous work done with SiPMs: one/multiple SiPMs going through a pre-amp in a channel. You can see the associated schematic below:
Sorry for the small schematic. This was just to give you an idea of my previous work with SiPMs. This schematic is based off of the SensL Read out circuit: http://sensl.com/products/j-series/. I'm using their J-series photomultiplier, though with one photomultiplier rather than two. You can see their schematic in the user manual. Reading from the cathode instead of the anode provides a negative current signal, and the feedback circuit filters out noise while inverting it, and turning the current signal into a voltage signal.
I'm still debating whether to have my 'array/network' of SiPMs go through multiple channels or if they will go through preamp circuits such as with the previous schematic. I'm really just trying to get some ideas on how to approach this. Logically speaking, if all the SiPMs go through one channel with a PreAmp, the voltage level from the output won't really tell which SiPM fired, just probably how many fired depending on the summing configuration. Therefore, how might I go about this?