Monitoring AC Power Distribution
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-13
In Josephson device circuits, AC power distribution networks are used to provide a supply voltage to various components in the circuit. In such a network, it is desirable to be able to check and measure both amplitude and phase variations. The circuits shown herein use conventional Josephson interferometers to measure amplitude and phase variation of high frequency signals. Lateral shrinkage of the interferometer threshold curve is proportional to the amplitude of AC modulation, and is monitored to determine amplitude variations. Phase variations are measured directly by phase shifting a difference signal back to the AC supply phase, and comparing the result with the correct amplitude of the AC supply.