An electronic equivalent scheme of a Josephson junction

Abstract

It is shown that a phase-locked loop is a rather close approximation to a real junction. A lot of phenomena observed in Josephson junctions are easily identified in the « equi- valent circuit ». It is further shown that the inclusion of an upper cut-off frequency in the loop gain causes a conductivity term similar to the cos ~-term experimentally observed in plasma resonance experiments. CURRENT-VOLTAGE CHARACTERISTICS.