Low-Frequency Noise of Resistively Coupled Charge Amplifiers

In resistive wire position sensitive neutron detector systems two charge sensitive preamp inputs are connected via the tube impedance. Due to this coupling the output noise increases significantly. This work investigates the behavior of that kind of coupling induced noise using a technique called "noise gain calculation". The output noise correlation is analyzed analytically. Attained results are cross checked via simulations and measurements. Conclusions are drawn to better understand system resolution estimation for coupled preamplifier designs.