29 September 2005 Design of low noise preamplifers for characterization of LSCO bolometers
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Abstract
Noise measurement is an important step in characterization of bolometers. Since this measurement is conducted with the bias applied to the bolometer and in most cases the measured noise level is well below the noise floor of FFT spectrum analyzers or other equipment used in this measurement, special pre-amplifiers and biasing circuits are needed. The requirements for these circuits are discussed in the paper along with limitations introduced by their components and the resistance of bolometers under test. Two preamplifiers, capable of measurements of bolometers whose resistance spans over five decades, are presented. Possible improvements to the existing pre-amplifiers are discussed and directions of further work are outlined.
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Pawel Wierzba, Pawel Wierzba, Sylwia Rydzewska, Sylwia Rydzewska, } "Design of low noise preamplifers for characterization of LSCO bolometers", Proc. SPIE 5957, Infrared Photoelectronics, 59571F (29 September 2005); doi: 10.1117/12.622889; https://doi.org/10.1117/12.622889
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