ABSTRACT
Superconducting digital circuits have two advantages compared with their competitive semiconductor circuits, such as Josephson junctions and superconducting microstrip transmission lines. The Josephson junction can switch its zero-voltage state to a finitevoltage one within a few picoseconds and power dissipation of the switching is extremely low because the voltage state is less than a few millivolts. The superconducting microstrip transmission line is able to transfer picosecond waveforms over virtually any interchip distance with a speed approaching that of light and low attenuation and dispersion. Superconducting microstrip lines can be laid out densely because there is little cross-talk between them, and the junctions can be impedance matched with the strip lines to ensure the ballistic transfer of the generated waveforms along the lines.
