Preamplifier and AD converter system for infrared focal plane arrays

Journal Article · Sun Oct 01 00:00:00 EDT 2000 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1311943· OSTI ID:40204895

Penegor, G; Wishnow, E H; Danchi, W C

We describe a precision preamplifier and analog-to-digital (AD) converter system for use with infrared focal plane arrays. The system uses a correlated double sampling integrated circuit which performs an analog subtraction of each full pixel level from its respective reset level prior to digitization by a 14-bit AD converter; this process is also known as ''delta-reset'' sampling. The system was designed to have good immunity to electrical noise interference and it has a measured dynamic range of better than 16384. A four channel version of this system is used to read out a 128x128 pixel Si:As array at a rate of 2.4 {mu}s/pixel for the Long Wavelength InfraRed Camera a 7--13 {mu}m camera designed and built for the Keck 10 meter telescope.

• Sponsoring Organization: (US)
• OSTI ID: 40204895
• Journal Information: Review of Scientific Instruments, Vol. 71, Issue 10; Other Information: DOI: 10.1063/1.1311943; Othernumber: RSINAK000071000010003921000001; 007011RSI; PBD: Oct 2000; ISSN 0034-6748
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CAMERAS
IMMUNITY
INTEGRATED CIRCUITS
PHYSICS
PREAMPLIFIERS
SAMPLING
WAVELENGTHS