Towards 10−10-Accurate Resistance Bridge at LNE

This paper describes the new resistance bridge based on a cryogenic current comparator which is developed at LNE to measure ratios of resistances having values in the range from 1 Ω up to 1 MΩ. The target combined standard uncertainty for the calibration of the 100 Ω/(R
_K
/2) ratio (R
_K
is the von Klitzing constant) is a few parts in 10
¹⁰
.