Preamplifier and AD converter system for infrared focal plane arrays
نویسندگان
چکیده
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 1283128 pixel Si:As array at a rate of 2.4 ms/pixel for the Long Wavelength InfraRed Camera a 7–13 mm camera designed and built for the Keck 10 meter telescope. © 2000 American Institute of Physics. @S0034-6748~00!00711-5#
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