GENERATING CIRCUIT OF SUPERCONDUCTION TIMING SIGNAL

摘要

PURPOSE:To make leading edges of a rectangular wave timing signal steep even when there is variance in the critical current values of Josephson junctions by supplying an input signal in a trigger pulse shape which synchronizes with a sine wave input signal and has a steep leading edge. CONSTITUTION:Input signals S1 and S2 are applied between input terminals T1 and T2, and the ground respectively; the input signal S1 uses a sine wave with enough amplitude for turnovers of Josephson junctions J1-J4 of a series circuit U1 of and the input signal S2 uses a trigger pulse which synchronizes with the signal S1 and has a steep leading edge. A resistance R1 is set to a proper value, and consequently even if all the Josephson junctions J1-J4 have slight variance in critial current value, the rectangular wave timing signal which has desired steep leading edges appears at an output terminal TO.