ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Using typical values of cable parameters and typical connections used in Johnson noise thermometry, a comparison was made between a two-wire and a three-wire transmission line model of a 30-m-long, shielded, twisted-pair cable over a range of frequencies from 0 to 300 kHz. For a 200-Ω source impedance and a 1-MΩ load impedance, the maximum difference between the voltage transfer functions calculated from the two models was 0.415%. For a 500-Ω source impedance, the maximum difference was 0.607%. For a 200-Ω source impedance and a 1-Ω load impedance, the maximum difference between the current transfer functions calculated from the two models was 4.24%. For a 500-Ω source impedance, the maximum difference was approximately 4.47%.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1140244
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