Data acquisition
US8735832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2010 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2006
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An imaging detector includes a scintillator array (202), a photosensor array (204) optically coupled to the scintillator array (202), a current-to-frequency (I/F) converter (314), and logic (312). The I/F converter (314) includes an integrator (302) and a comparator (310), and converts, during a current integration period, charge output by the photosensor array (204) into a digital signal having a frequency indicative of the charge. The logic (312) sets a gain of the integrator (302) for a next integration period based on the digital signal for the current integration period. In one instance, the gain is increased for the next integration period, relative to the gain for the current integration period, which allows for reducing an amount of bias current injected at an input of the I/F converter (314) to generate a measurable signal in the absence of radiation, which may reduce noise such as shot noise, flicker noise, and/or other noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.