Patent ID: 11956413
Assignee: META PLATFORMS TECHNOLOGIES, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The apparatus of claim 1, further comprising:
a charge sensing unit comprising a capacitor and a buffer, the buffer being coupled with the quantizer;
a first transfer switch coupled between the first photodiode and the capacitor; and
a second transfer switch coupled between the second photodiode and the capacitor;
wherein the controller is configured to:
control the first transfer switch, while disabling the second transfer switch, to transfer first overflow charge of the first charge from the first photodiode to the capacitor to generate a first voltage;
control the quantizer to measure, based on the first voltage, a time of saturation of the capacitor by the first overflow charge as the first digital output;
control the quantizer to measure, based on the first voltage, a quantity of the first overflow charge transferred by the first photodiode as the second digital output;
control the second transfer switch, while disabling the first transfer switch, to transfer second residual charge of the second charge from the second photodiode to the capacitor to generate a second voltage; and
control the quantizer to measure, based on the second voltage, a quantity of the second residual charge transferred by the second photodiode as the third digital output.