Patent ID: 7541964

Claim:
A microelectronic imaging device comprising at least one detector comprising a photodetector, at least one integration capacitor associated to the detector and adapted to provide at least one analogue signal that is variable at least according to a current supplied by the detector, and analogue/digital conversion means comprising: a comparator adapted to receive an analogue signal from an integration capacitor and to provide a two-states output signal for adopting, according to the analogue signal, a first state called the “stable state” or a second state, charge injector means for modifying the analogue signal by at least one injection of a given quantity of charge into the capacitor following a change of state at the output of the comparator, from the first state to the second state, command means for controlling the charge injector means, wherein the command means are adapted to modulate the given quantity of charge according to the intensity of said current.