Compact low noise signal readout circuit having at least one open-loop amplifier and method for operating thereof
US8563916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Apr 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a solid-state electric charge sensor (200, 600) comprising at least one signal-readout circuit (205, 605) that comprises a current source (140, 640) and a column line (120, 620). The sensor also comprises at least one charge detector circuit (210, 610) that is operatively coupled with the at least one signal-readout circuit (205, 605). The at least one signal-readout circuit (205, 605) is characterized by further comprising at least one open-loop amplifier (250, 650), the input of which is operatively connectable with the at least one column signal line (220, 620) and with the at least one current source (240, 640); at least one feedback line (230, 630) that is operatively connectable with the output (254, 654) of the at least one open-loop amplifier (250, 650); and operative to selectively form a negative feedback loop; and wherein the open-loop amplifier (250, 650) has an inverting voltage gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.