An integrated CMOS time-to-digital converter for coincidence detection in a liquid xenon PET prototype

A Time to Digital Converter was designed (CMOS 0.35 μm) to perform coincidence detection in a Liquid Xenon PET prototype. This circuit proved to be able to operate at 150 K, while showing a resolution better than 250 ps. The circuit enables a low readout dead time (<90 ns) and provides a fully synchronous digital interface for easy data retrieval.