In-pixel differential transconductance amplifier for ADC and image sensor architecture
US10142575B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 2016 |
| Grant date | Nov 27, 2018 |
| Priority date | — |
| Expiry date | Jun 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/811
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor comprises a first die with an array of pixels and a second die. The first die and second die are stacked together. A first in-pixel part of an analog-to-digital converter (ADC) outputs at least one current signal. The first in-pixel part of the ADC is a Differential Transconductance Amplifier includes a first differential input for receiving the analog signal and a second differential input for receiving a reference signal. There is at least one output bus connected between the first in-pixel part of the ADC on the first die and the second part of the ADC on the second die. The first part of the ADC is adapted to output the at least one current signal to the at least one output bus, and the second part of the ADC is adapted to receive the at least one current signal and to generate a digital signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.