Patent ID: 9207065
Filing Date: 2015-12-08
Classification: G01B,G01S

Abstract:
1. A depth sensing apparatus, comprising: a controller to reset, to a reference voltage value, a voltage of each of a first floating diffusion node and a second floating diffusion node of a sensor pixel for a first time period, to control the first floating diffusion node to store a voltage of a photodiode in a first phase interval for a second time period, and to control the second floating diffusion node to store the voltage of the photodiode in a second phase interval for the second time period, wherein a difference between the first phase interval and the second phase interval is 180 degrees, and wherein, for the first time period, the controller resets, to the reference voltage value, the voltage of each of the first floating diffusion node and the second floating diffusion node by shorting an output node of a correlated double sampling (CDS) amplifier of a sensor column from the first floating diffusion node and the second floating diffusion node; and a calculator, using one or more processors, to calculate a difference between the voltage of the first floating diffusion node and the voltage of the second floating diffusion node for a third time period.