Maximizing the Resolution of a Dual RF Drive Programmable Josephson Voltage Standard

A dual radio frequency drive programmable Josephson voltage standard can generate quasi-continuous voltages with quantum accuracy. This paper focuses on the mathematical methods used to maximize the achievable voltage resolution and describes two algorithms that can be employed. Quasi-continuous voltages with a resolution of a few nanovolts have been achieved using Josephson junction arrays with missing junctions and an almost arbitrary segment structure.