Image sensor using a global shutter and method for controlling same

A method, comprising:

• controlling an image sensor that includes a matrix of pixels, each including:
• a first transistor and a first switch that are coupled in series between an internal node of the pixel and a first node configured to receive a first potential, a gate of the first transistor being coupled with a floating diffusion node of the pixel;
• a capacitive element having a first terminal coupled to the floating diffusion node of the pixel;
• and
• plural assemblies, each including a capacitance and a second switch coupled in series with the capacitance and coupling the capacitance to the internal node of the pixel, the controlling including:
• storing voltages in the assemblies of the pixels, the storing including, for each pixel, controlling an increase, by a determined value, of a difference in potential between the floating diffusion node and the internal node of the pixel.

An image sensor comprising:

• a matrix of pixels, each including:
• a first transistor and a first switch that are coupled in series between an internal node of the pixel and a first node configured to receive a first potential, the first transistor including a gate coupled with a floating diffusion node of the pixel;
• a capacitive element having a first terminal coupled to the floating diffusion node of the pixel;
• and
• plural assemblies, each including a capacitance and a second switch coupled in series with the capacitance and coupling the capacitance to the internal node of the pixel;
• and
• a control circuit configured to control, for each pixel, each time a voltage is stored in one of the assemblies of the pixel:
• an increase, of a determined value, of a difference in potential between the floating diffusion node and the internal node of the pixel;
• and
• a switching of the potential applied to the first node, from a first level to a second level that is higher than the first level, before the increase.