A pixel comprising: - a photo-sensitive element , which is a pinned photodiode, for generating charges in response to incident radiation; - a sense node (FD); - a transfer gate (TG), connected between the photosensitive element and the sense node (FD), for controlling transfer of charges to the sense node (FD); - a reset switch (M1) having its source input connected to the sense node (FD) for resetting the sense node (FD) to a predetermined voltage and its drain input connected to a supply line (Vdd) and to a first control line which is operable to discharge the first and/or the second sample stage ; - a first buffer amplifier (AMP1, M2) having its gate input connected to the sense node (FD) and its drain input connected to the supply line (Vdd) and to the first control line; - a first sample stage comprising a first sample switch (Sample2) connected to an output of the first buffer amplifier (AMP1, M2), and a storage element (C2) for storing a first sample value, in particular a signal value, of the sense node (FD), wherein the first sample stage is selectively operable through the first sample switch (Sample2); - a second sample stage connected in cascade with the first sample stage, the second sample stage comprising a second sample switch (Sample1) connected to an output of the first sample switch (Sample2), and a further storage element (C1) for storing a second sample value, in particular a reset value, of the sense node (FD), wherein the second sample stage is selectively operable through the first sample switch (Sample2) and the second sample switch (Sample 1); and - a second buffer amplifier (AMP2, M4) having an input connected to the second sample stage; - wherein the transfer gate (TG) is adapted for transferring substantially all charge from the photosensitive element to the sense node (FD) when the transfer gate (TG) is opened. - a photo-sensitive element , which is a pinned photodiode, for generating charges in response to incident radiation; - a sense node (FD); - a transfer gate (TG), connected between the photosensitive element and the sense node (FD), for controlling transfer of charges to the sense node (FD); - a reset switch (M1) having its source input connected to the sense node (FD) for resetting the sense node (FD) to a predetermined voltage and its drain input connected to a supply line (Vdd) and to a first control line which is operable to discharge the first and/or the second sample stage ; - a first buffer amplifier (AMP1, M2) having its gate input connected to the sense node (FD) and its drain input connected to the supply line (Vdd) and to the first control line; - a first sample stage comprising a first sample switch (Sample2) connected to an output of the first buffer amplifier (AMP1, M2), and a storage element (C2) for storing a first sample value, in particular a signal value, of the sense node (FD), wherein the first sample stage is selectively operable through the first sample switch (Sample2); - a second sample stage connected in cascade with the first sample stage, the second sample stage comprising a second sample switch (Sample1) connected to an output of the first sample switch (Sample2), and a further storage element (C1) for storing a second sample value, in particular a reset value, of the sense node (FD), wherein the second sample stage is selectively operable through the first sample switch (Sample2) and the second sample switch (Sample 1); and - a second buffer amplifier (AMP2, M4) having an input connected to the second sample stage; - wherein the transfer gate (TG) is adapted for transferring substantially all charge from the photosensitive element to the sense node (FD) when the transfer gate (TG) is opened. <EOS>