Development of an ASIC for 2-D readout of Gas Electron Multiplier detectors

This paper describes an Application Specific Integrated Circuit (ASIC) to be used for readout of large area (30 × 30cm²) Gas Electron Multiplier (GEM) detector. The GEMROC design follows the concept of the previously designed MSGCROC ASIC for 2-D readout of Micro Strip Gas Chamber (MSGC) detector. The architecture and parameters are determined by requirements of 2-D GEM detector used in the Proton Range Radiography system. The circuit has been designed in 0.35μm CMOS process. The basic functionality and parameters have been evaluated using the testability functions implemented in the ASIC design. In the paper we present the architecture of the ASIC, designs of selected circuits, and examples of test results.