Method and device for controlling sensitivity of a spad macro-cell

Abstract

A SPAD macro-cell comprises an array of SPAD unit, each of which comprises a SPAD and a quenching circuit for the SPAD, a combination tree to combine output signals from the SPAD units and a time-to-digital converter (TDC) operably connected to an output of the combination tree. The SPAD macro-cell is divided to a plurality of sub-cells. The SPAD macro-cell further comprises a control circuit configured to enable at least one or some SPAD units in each sub-cell in a time period and enable another one or some other SPAD units in each sub-cell in the next time period.

Dependencies are inferred from the claim text.