Stable Josephson reference voltages between 0.1 and 1.3 V for high-precision voltage standards
Abstract
A new series array of 1440 Josephson tunnel junctions has been developed and tested as a reference voltage standard. It yields microwave induced quantized voltage steps up to 1.3 V. The steps are usually stable for more than 5 h with a microwave driving frequency of either 70 or 90 GHz. A high-resolution comparison of a constant voltage step at the 1-V level with the electromotive force of a saturated Weston cell is described. The comparison shows that the step voltage is constant to within ±1 nV over the full step width.
- Publication:
-
Applied Physics Letters
- Pub Date:
- December 1985
- DOI:
- 10.1063/1.96335
- Bibcode:
- 1985ApPhL..47.1222N
- Keywords:
-
- Electric Potential;
- Josephson Junctions;
- Microwave Circuits;
- Arrays;
- Electromotive Forces;
- Integrated Circuits;
- Standardization;
- Electronics and Electrical Engineering