Externally Adjustable Delay Circuit for Use in Cryogenic Environment
Original Publication Date: 1978-Feb-01
Included in the Prior Art Database: 2005-Feb-20
In many applications which utilize Josephson junction circuitry, variable delays are required. Because the circuits are immersed in a liquid helium environment, mechanically adjustable delays are next to impossible to achieve. The present article shows a circuit for obtaining such delays electronically using Josephson device in the same liquid helium environment. One application of such a circuit is in the precise measurement of the time it takes an input signal to traverse a selected path within a functional combinatorial network.