AN EXPERIMENTAL IMPLEMENTATION OF HIGH-T(C)-BASED RSFQ SET-RESET TRIGGER AT 4.2-K

A rapid single-flux quantum (RSFQ) Set-reset trigger circuit has been implemented using YBaCuO grain boundary junctions on an asymmetric 32- degrees Y-ZrO2 bicrystal. The circuit contains 18 Josephson junctions aligned along the grain boundary and required six film layers: a YBaCu O base electrode, two amorphous SrTiO3 insulating layers, a supercondu cting Pb/Au/Cr ground plane and Au/Cr wiring. It consists of two DC-to -SFQ converters, two Josephson transmission lines and an SFQ-to-DC con verter. Two pulse trains, 'signal' and 'clock, were applied to change the state of the trigger from '0' to '1' and vice versa, and registere d at the SFQ-to-DC output. All experiments were performed at 4.2 K.