Frequency divider making use of Josephson junction circuits

摘要

A frequency divider is provided by coupling the gate current paths of a pair of Josephson junction gate circuits in parallel with the control current path of a third Josephson junction gate circuit being connected in series with the gate current path of one of the first pair of Josephson junctions. The gate current path of the third Josephson junction is connected in series with the control current path of the other of the first pair of Josephson junctions, and an input signal to be frequency divided is connected in common to the connection point of the control current path of the first Josephson junction and gate current path of the third Josephson junction. Current flowing through the control current path of the first Josephson junction will be at one-half the frequency of the input current. A plurality of frequency dividers may be cascaded to perform 1/2N frequency division.