ASIC for CPG sensors with grid-only depth-of-interaction sensing

A new version of the front-end application specific integrated circuit (ASIC) for coplanar-grid sensors is presented. Compared to the first version the ASIC is optimized for signal/noise performance, modified in peaking time, and it implements timing signals to measure the depth of interaction using the grids signals only. Experimental results using state-of-the-art CPG sensors and different approaches for reducing the error due to electron trapping are reported. A new technique that makes use of the sum and difference of the grids signals is also presented