Pixel of image sensor and image sensor

An image sensor, comprising an array of a plurality of pixels, wherein at least one pixel of the plurality of pixels comprises:

• an optical-to-electrical conversion circuit, configured to generate a first current based on incident light that is incident on the pixel;
• and
• a composite measurement circuit, coupled to the optical-to-electrical conversion circuit, wherein
• the composite measurement circuit comprises a configuration signal receiving unit, an integration unit, a comparison unit, and a delay sampling unit;
• a first end of the configuration signal receiving unit is coupled to the optical-to-electrical conversion circuit, a second end of the configuration signal receiving unit is coupled to a first end of the integration unit and an input end of the comparison unit, and
• wherein the configuration signal receiving unit is configured to:
• output the first current to the integration unit;
• or receive a plurality of sampling signals, and periodically output the first current to the integration unit based on signal periods of the plurality of sampling signals;
• a second end of the integration unit is coupled to a first level, and the integration unit is configured to integrate the first current to obtain a measured voltage, and provide the measured voltage to the comparison unit;
• an input end of the comparison unit is coupled to the first end of the integration unit, and is configured to:
• compare the measured voltage with a preset reference voltage, and send a comparison result signal to the delay sampling unit,
• wherein based on the measured voltage being less than a reference level, a level of the comparison result signal is a second level;
• based on the measured voltage being greater than or equal to the reference level, a level of the comparison result signal is a third level;
• and the second level is greater than the third level;
• and
• the delay sampling unit is coupled to an output end of the comparison unit, and the delay sampling unit is configured to perform sampling processing on the comparison result signal to generate a first pulse signal or a plurality of second pulse signals,
• wherein the first pulse signal represents intensity information of the incident light, the plurality of sampling signals are in a one-to-one correspondence with the plurality of second pulse signals, the plurality of second pulse signals represent a phase offset between a phase of the incident light and a specified phase, and the incident light is a reflected light ray that is of the specified phase and that is incident to a target object.