Vortex motion for device applications

We show experimentally and theoretically (numerical simulations) that the flux-flow branch of a long Josephson junction can be modulated by a control current. This phenomenon is exploited in making an inverting, non-latching switching device capable of analog as well as digital signal amplification. It is shown that current gain of the order of 4 can be achieved in a 2.5 μm technology, for small resistive loads of the order of 0.5 Ω. © 1982.