Photosensitive device including an integrator circuit per group of at least two photosensitive elements

An ambient light sensor comprising a photosensitive device, the photosensitive device comprising:

• a peripheral circuit semiconductor region;
• a photosensitive circuit semiconductor region comprising a group of at least two photosensitive elements used to measure a respective optical component of ambient light, each photosensitive element configured to generate a photoelectric signal on a respective critical node of a corresponding photosensitive element;
• and
• an integrator circuit per group of photosensitive elements, each integrator circuit comprising:
• an amplification circuit located in the peripheral circuit semiconductor region, the amplification circuit comprising input nodes and an output node,
• a differential circuit for each photosensitive element of the group, the differential circuit located in the photosensitive circuit semiconductor region, the differential circuit coupled between a respective critical node and the input nodes of the amplification circuit, each differential circuit having a differential pair of transistors, a corresponding conduction terminal of the differential pair of transistors is coupled in parallel between a supply current source and differential channels, and a corresponding control terminal of the differential pair is coupled to a reference voltage terminal and to the respective critical node, and
• a feedback circuit for each photosensitive element of the group, the feedback circuit comprising a capacitive element located in the photosensitive circuit semiconductor region, the feedback circuit coupled between the output node of the amplification circuit and the respective critical node.

A photosensitive device, comprising:

• a photosensitive circuit semiconductor region comprising a set of photosensitive elements used to measure a respective optical component of ambient light, each photosensitive element configured to generate a photoelectric signal on a critical node of a corresponding photosensitive element;
• an amplification circuit having a plurality of input nodes and an output node;
• a differential circuit coupled between the critical node and the input nodes of the amplification circuit, wherein each differential circuit includes a differential pair of transistors, a corresponding conduction terminal of the differential pair of transistors coupled in parallel between a supply current source and differential channels, and a corresponding control terminal of the differential pair coupled to a reference voltage terminal and to the critical node;
• and
• a feedback circuit comprising a capacitive element, the feedback circuit coupled between the output node of the amplification circuit and the critical node.