High-gain cryogenic amplifier assembly employing a commercial CMOS operational amplifier

Autor:	A. W. Smith, Timothy M. Jung, Solomon I. Woods, J. E. Proctor
Rok vydání:	2015
Předmět:	Transimpedance amplifier Materials science Physics::Instrumentation and Detectors business.industry Amplifier Differential amplifier Y-factor Low-noise amplifier law.invention law Operational amplifier Optoelectronics Instrumentation amplifier Direct-coupled amplifier business Instrumentation
Zdroj:	Review of Scientific Instruments. 86:073102
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.4923277
Popis:	We have developed a cryogenic amplifier for the measurement of small current signals (10 fA-100 nA) from cryogenic optical detectors. Typically operated with gain near 10(7) V/A, the amplifier performs well from DC to greater than 30 kHz and exhibits noise level near the Johnson limit. Care has been taken in the design and materials to control heat flow and temperatures throughout the entire detector-amplifier assembly. A simple one-board version of the amplifier assembly dissipates 8 mW to our detector cryostat cold stage, and a two-board version can dissipate as little as 17 μW to the detector cold stage. With current noise baseline of about 10 fA/(Hz)(1/2), the cryogenic amplifier is generally useful for cooled infrared detectors, and using blocked impurity band detectors operated at 10 K, the amplifier enables noise power levels of 2.5 fW/(Hz)(1/2) for detection of optical wavelengths near 10 μm.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::05987342a6817fa945d4ddfe22f598f8 https://doi.org/10.1063/1.4923277 Zobrazit plný text záznamu