A pixel circuit for detecting time-dependent visual data comprises a photo sensing device detecting a light intensity and generating a signal representing the detected light intensity. The pixel circuit further comprises: - a voltage amplifier (3) configured for amplifying the signal representing the detected light intensity (VPh) and generating an amplified signal (Vo), the amplified signal being generated by taking into account a control signal (VqDc) which shifts an input voltage offset of said voltage amplifier, - a hysteresis comparing module (4) configured for comparing the amplified signal to at least one threshold value (θο+, θο- ) and to a reference value (Vref ) and for generating at least one output signal (Vο+, Vο-;Vο1+, Vο1-) based on said comparison, and - a feedback control module configured for generating said control signal of said voltage amplifier based on said at least one output signal generated by said hysteresis comparing module.

Chronocam, Consejo Superior de Investigaciones Científicas (España)

A1 Solicitud de patente con informe sobre el estado de la técnica

Peer reviewed