Operation of Nist Josephson Array Voltage Standards (Classic Reprint)

Angebote / Angebote:

Excerpt from Operation of Nist Josephson Array Voltage StandardsAlthough the ac Josephson effect provides a bet ter voltage reference than standard cells, the first Josephson standards were difficult to use, mainly because a single junction produces a very low voltage-from 1 to 10 mv. Early Josephson voltage standards were unique systems, custom built for national standards laboratories.The accuracy of Josephson voltage standards improves substantially when many junctions are connected in series to generate a large voltage. This approach has been used to achieve a level of 100 mv from 20 individually biased junctions Extension of this approach to larger voltages rapidly becomes impractical because it is necessary to bias each junction onto one of the constant voltage steps shown in figure 1.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.