IMNS Seminar Series - Salvatore Gnecchi & Luca Parmesan


Conference Room 1:03/1:04, SMC


Thursday, March 19, 2015 - 13:00 to 14:00


Talk 1:   SALVATORE GNECCHI - A Simulation Model for Digital Silicon Photomultipliers

We propose a simulator model to estimate the performance of digital Silicon Photomultipliers (dSiPM) based on Single Photon Avalanche Diodes (SPADs) in terms of detection rate of photons incident on the sensor. The work provides guidelines for efficient array structure depending on: the number of SPADs, fill factor, area of both SPADs and array. A comparison of the main techniques present in the literature to digitally combine multiple outputs into single channel is included.

Talk 2:   LUCA PARMESAN - A 256x256 SPAD array with in-pixel Time to Amplitude Conversion for Fluorescence Lifetime Imaging Microscopy

A 8 μm pitch SPAD-based pixel is presented with a scalable Sample and Hold (S/H) Time to Amplitude Converter (TAC) pixel architecture enabling high spatial resolution Time Correlated Single Photon Counting (TCSPC) image sensors. The NMOS-only TAC pixel is designed in a 256x256 array with a differential analogue readout and a fast parallel 2bits digital readout.  The TCSPC SPAD array performance is measured optical experimental setup. 66.6 ps LSB time resolution is obtained over 50 ns dynamic range. Dynamic range configurability and limitation are discussed and improvements suggested.


Event Contact Name: 

Dr Jonathan Terry

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