NOVEL DESIGN OF RAPID SINGLE FLUX QUANTUM LOGIC-BASED ON A SINGLE-LAYER OF A HIGH-T-C SUPERCONDUCTOR

We suggest a new design of rapid single flux quantum (RSFQ) logic circuits which is based on a single superconducting layer and does not require a superconducting ground plane. Small inductances of about 10 pH, obligatory for RSFQ circuits, are formed as narrow slits of widths comparable to the London penetration depth (≅0.15 μm). The design allows us to decrease the geometric size of the RSFQ cell. Test circuits with YBaCuO grain boundary junctions on asymmetric 32°Y- ZrO2 bicrystals were used to measure the slit inductance per unit length and the mutual inductance of neighboring slits. A typical inductance of a 0.4 μm slit was found to be 0.7-0.8 pH/μm.© 1995 American Institute of Physics.