Amplifier adapted for CMOS imaging sensors
US9374545B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2013 |
| Grant date | Jun 21, 2016 |
| Priority date | — |
| Expiry date | Jan 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A column readout amplifier and imaging array using the same method are disclosed. The column readout amplifier includes a signal amplifier having an amplifier signal output, a first filter capacitor, a buffer amplifier having a buffer amplifier input and a buffer amplifier output, and a switching network. The switching network connects the amplifier signal output to the buffer amplifier input and the buffer amplifier output to the first filter capacitor during a first time period, and connects the amplifier signal output directly to the first filter capacitor during a second time period. The time periods can be of fixed duration or determined by the difference in potential between the input and output of the buffer amplifier. The column readout amplifier can be used in an imaging array to readout columns of pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.