Compact ultra-low noise high-bandwidth pixel amplifier for single-photon readout of photodetectors
US6417504B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Jan 1, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/773
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An ultra-low noise, high gain interface pixel amplifier is provided with capability for single-photon readout of known photodetectors at high electrical bandwidths for diverse spectral bandpass from the x-ray to long IR bands. The detector charge modulates a source follower whose output is double sampled to remove correlated noise by a compact stage that also provides optimum level shift for subsequent amplification of the full signal excursion. The level-shifted signal finally drives a compact amplifier that generates a robust end-to-end transimpedance. Single-photon readout of photodetectors at high electrical bandwidths in small pixel areas is thereby facilitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.