Design of low noise preamplifers for characterization of LSCO bolometers

Details Design of low noise preamplifers for characterization of LSCO bolometers Design of low noise preamplifers for characterization of LSCO bolometers

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5957..286w&link_type=abstract

Integrated Optics: Theory and Applications. Edited by Pustelny, Tadeusz; Lambeck, Paul V.; Gorecki, Christophe. Proceedings of

Physics

Optics

Scientific paper

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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