A Verilog-A model for the design of devices for fluorescence life-time measurement with CMOS SPADs

Point of care devices for the early diagnosis of current relavant diseases of our society require novel miniature and very effective devices. This contribution focuses on the description of behavioral models aimed to develop custom readout Application-Specific Integrated Circuits (ASICs) for the measurement of Fluorescence and Fluorescence life-time of target substances. The well suited for the ASIC development Verilog-A behavioral description language is used to describe the sensor, an ultra sensitive Single Photon Avalanche Diode (SPAD) fabricated in a conventional CMOS process, and the fluorescence signal.