A cryogenic front-end preamplifier operating at 120 K for bolometric detector

Please use this identifier to cite or link to this item: http://dspace.iitrpr.ac.in:8080/xmlui/handle/123456789/1541

Title:	A cryogenic front-end preamplifier operating at 120 K for bolometric detector
Authors:	Reza, A. Vatsa, V. Pose, M.S. Mazumdar, A. Garai, A. Krishnamoorthy, H. Gupta, G. Nanal, V. Pillay, R.G. Shrivastava, A.
Keywords:	Cryogenic amplifier Bolometer detector Low-noise amplifier
Issue Date:	16-Mar-2020
Abstract:	In this paper, the design and test results of a front-end cryogenic amplifier for a bolometer detector are presented. The amplifier is implemented with two low-noise Si JFETs, where the first FET is configured as a source follower amplifier and the second FET provides a high dynamic resistance to keep the voltage gain very close to unity. A 3 dB bandwidth over a wide range from DC to 10 MHz is achieved in this design. The input voltage noise density is ~ 1.9 nV/√Hz at 300 K, which further reduces to 1.6 nV/√Hz at 120 K. The flicker corner frequency observed is below 50 Hz.
URI:	http://localhost:8080/xmlui/handle/123456789/1541
Appears in Collections:	Year-2020

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