Signal processing method for histogram generation, and corresponding device and use comprising a current injection module connected to plural capacitors assigned to a plurality of bins

A signal processing device for histogram generation from a plurality of event detectors, wherein said histogram is of the kind that includes a plurality of bins, wherein each of said event detectors generates an event signal as a response to an external event, comprising:

• a circuit including a current injection module, a plurality of capacitors connected to said current injection module, each of said capacitors intended to be assigned to a bin, and a reading circuit for reading a charge accumulated in each of said capacitors;
• wherein said circuit is configured to carry out the following steps for generating said histogram:
• [a] during an event time interval corresponding to a bin, said plurality of event detectors generates a plurality of said event signals as a response to a plurality of external events,
• [b] said current injection module detects said event signals,
• [c] for each one of said event signals, said current injection module generates a corresponding current signal, and said current signal is injected in a capacitor assigned to said bin, and stored therein during a pre-defined injection time interval associated to said capacitor and to said bin which is different in terms of start time and/or duration from said event time interval corresponding to the same bin,
• [d] repeating steps [a] to [c] for each successive bin of said histogram,
• and reading the charge accumulated in each of said capacitors for the bin assigned to said capacitor.