Dwell Time Technique for AC Power of Josephson Circuits
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
In Josephson circuitry powered by an AC waveform, it can be the situation that the Josephson devices stay in their voltage state when the power supply waveform changes polarity, rather than resetting. This phenomenon is called punchthrough, and is an undesirable event. In order to solve this problem, it has been previously proposed to provide a dwell time in the AC waveform near the zero crossing of the waveform. This article describes a specific technique to provide a dwell time in which the Josephson regulator junctions are placed in series with the AC power supply, while a current dump is placed in parallel with the AC supply.