Apparatus and method for low dark current floating diffusion
US10103193B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2017 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Aug 3, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/80373
Abstract
An apparatus and method for a low dark current floating diffusion is discussed. An example method includes coupling a photodiode to a floating diffusion through a transfer gate where a gate terminal of the transfer gate is provided a first voltage, resetting the floating diffusion, repetitively sampling image charge on the photodiode a plurality of times, where the sampled image charge is coupled to the floating diffusion, and where the gate terminal of the transfer gate is provided a second voltage less than the first voltage during each sampling of the image charge, while repetitively sampling the image charge, coupling an additional capacitance to the floating diffusion, where a first capacitance voltage is applied to the additional capacitance during the sampling, and performing correlated double sampling of the sampled image charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.