For a neutrino detector related experiment, I need to design a circuit which generates the pulse similar to the detector. This is required to test the front end electronics.
Here are my final goals:
Pulse shape: Linear rise exponential fall, Rise time: 1-3nS, Pulse width: 10-20nS, frequency: 100Hz-10kHz (user control/ random distribution), amplitude: 0.05-15mV (user control/ random distribution)
But to start on a simple note I am trying to generate a simple linear Rise exponential fall pulse. Currently I am able to generate 1nS to 10nS square pulses (using FPGA), which mimics the linear rise part due to slew, but I need some circuit suggestion for exponential fall part. I tried to go with capacitor discharge but it seems that even RF switches are not that fast in terms of switching frequency.
Any suggestion is welcome.