Image sensors having boost current control circuitry for column settling speedup

An image sensor comprising:

• imaging pixels, wherein an imaging pixel of the imaging pixels comprises:
• a photosensitive area;
• a floating diffusion region;
• a transfer transistor that is coupled between the photosensitive area and the floating diffusion region;
• a capacitor;
• and
• a dual conversion gain transistor that is coupled between the floating diffusion region and the capacitor;
• a column output line that is coupled to a column of the imaging pixels that includes the imaging pixel;
• and
• control circuitry, wherein the control circuitry comprises a comparator that compares an actual current to a target current and wherein the control circuitry is configured to control the dual conversion gain transistor during readout based on an output of the comparator.

An image sensor comprising:

• an array of imaging pixels;
• a column output line that is coupled to a column of the imaging pixels;
• a current source;
• a first transistor that is interposed between the current source and the column output line;
• a second transistor that is interposed between the column output line and ground;
• and
• control circuitry configured to selectively assert the first transistor during readout based on a comparison between an actual current and a target current.