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Method for obtaining minimum noise in a general purpose hot wire amplifier

Rao, GNV (1961) Method for obtaining minimum noise in a general purpose hot wire amplifier. In: Journal of Scientific Instruments, 38 (12). pp. 491-492.

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Official URL: http://iopscience.iop.org/0950-7671/38/12/318


It has been shown that the conventional practice of designing a compensated hot wire amplifier with a fixed ceiling to floor ratio results in considerable and unnecessary increase in noise level at compensation settings other than optimum (which is at the maximum compensation at the highest frequency of interest). The optimum ceiling to floor ratio has been estimated to be between 1.5-2.0 ωmaxM. Application of the above considerations to an amplifier in which the ceiling to floor ratio is optimized at each compensation setting (for a given amplifier band-width), shows the usefulness of the method in improving the signal to noise ratio.

Item Type: Journal Article
Publication: Journal of Scientific Instruments
Publisher: Institute of Physics
Additional Information: Copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 23 Jun 2010 05:54
Last Modified: 19 Sep 2010 06:09
URI: http://eprints.iisc.ac.in/id/eprint/28445

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