Readout circuits for multi-channel photomultiplier arrays

摘要

A readout circuit for multi-channel photomultiplier arrays, such as SiPM arrays, is proposed. It comprises a current mode input stage (15) with distinct gain paths. The current mode input stage (15) comprises a dual loop feedback circuit (40, 50). The first feedback is a high frequency loop feedback (40) and the second is a low frequency feedback circuit (50). The resulting readout circuit is a wideband readout circuit with improved resolution of timing and energy measurements. Furthermore, a dedicated pile-up measurement path (300) allows independent detection of pile-up readings.