Low-Level Average Power Measurements: Noise Figure Improvements Through Parallel or Series Connection of Noisy Amplifiers
- 1 August 1973
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 44 (8) , 1049-1052
- https://doi.org/10.1063/1.1686298
Abstract
Four basic configurations suitable for recording low frequency noise from two‐terminal devices‐single voltage and single current amplifiers, dual voltage and dual current amplifiers with cross‐correlation‐are reviewed. Simple signal‐to‐noise ratio comparisons form the basis for the practical selection of the configuration which achieves the best match between the characteristics of the source (including its electrical access) and those of available amplifiers.Keywords
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