LOFIC anti-lag methods with reverse bias optimization, and associated systems, devices, and methods

An image sensor, comprising:

• a pixel circuit, including—
• a photodiode configured to photogenerate signal charge based on incident light,
• a floating diffusion configured to receive the signal charge from the photodiode,
• a lateral overflow integration capacitor (LOFIC) having (i) a first metal electrode selectively coupled to the floating diffusion and (ii) a second metal electrode,
• a first reset transistor configured to selectively couple (a) the first metal electrode of the LOFIC and the floating diffusion to (b) a power source, based at least in part on a first reset control signal applied to a gate of the first reset transistor, and
• a second reset transistor configured to selectively couple the second metal electrode of the LOFIC to the power source based at least in part on a second reset control signal applied to a gate of the second reset transistor;
• and
• a switch configured to selectively couple the second metal electrode of the LOFIC to a bias voltage source, wherein a voltage level of a bias voltage provided by the bias voltage source is less than a voltage level of a power supply voltage supplied by the power source,
• wherein the image sensor is configured, during a pixel LOFIC idle period of a frame, to:
• apply a reverse bias to the LOFIC of the pixel for a first time period, and applying a 0V bias to the LOFIC of the pixel for a second time period.