Niclass, C.Charbon, E.Besse, P. A.Rochas, A.2009-07-132009-07-132009-07-132007https://infoscience.epfl.ch/handle/20.500.14299/41300Integrated circuit (1) comprising: an array of single photon avalanche diodes (SPADs), a plurality of read-out circuits, each SPADs being coupled to one read-out circuit, wherein at least some of the read-out circuits comprise time-to-digital converters (TDC) and/or a digital asynchronous counter, wherein a plurality of SPADs are coupled to one single read-out circuit. The read-out circuit may comprise a transformer for decoupling the SPAD from other parts of said read-out circuit.patentUS8168934US2010127160US7547872US7501628US7262402US2006202121US2006202129US200619208636931212