Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
In superconductor technology, interferometers are often used in the design of logic circuits. One of these is a "stepped" interferometer which uses a multilayered insulator between the interferometer loops and the ground plane in order to obtain a large inductance. It is a rather large device. Another interferometer is the "holey" interferometer which is much smaller because its inductance primarily arises from holes in the groundplane beneath the interferometer loops. However, the holey interferometer is much more susceptible to trapped flux than the stepped interferometer. The proposed interferometer is as compact as the holey interferometer and as immune to trapped flux as the step device.