Title :
An interface circuit for a Josephson-CMOS hybrid digital system
Author :
Suzuki, M. ; Maezawa, M. ; Takato, H. ; Nakagawa, H. ; Hirayama, F. ; Kiryu, S. ; Aoyagi, M. ; Sekigawa, T. ; Shoji, A.
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
For broadband data communication between Josephson and CMOS digital systems, amplification of small Josephson-output signals and synchronization between the systems are important issues. We present an interface circuit for a Josephson-CMOS hybrid digital system. The interface circuit consists of a parallel-in-parallel-out (PIPO) circuit and built-in Josephson-MOS amplifiers. The PIPO circuit, implemented based on 4JL latching logic technology, performs synchronized data transfer between the Josephson and CMOS circuits. The Josephson-MOS amplifiers consists of stacked Josephson junctions (Suzuki stacks) and MOS inverters which are monolithically integrated on a chip. The circuits have been designed, fabricated and tested. We have successfully confirmed correct operation of the circuits.
Keywords :
CMOS logic circuits; flip-flops; hybrid integrated circuits; logic gates; superconducting logic circuits; synchronisation; CMOS logic gates; Josephson-CMOS hybrid digital system; MOS inverters; Suzuki stacks; amplification; broadband data communication; built-in Josephson-MOS amplifiers; clock divider; interface circuit; latching logic technology; monolithically integrated; parallel-in-parallel-out circuit; small Josephson-output signals; stacked Josephson junctions; synchronization; synchronized data transfer; Broadband amplifiers; Broadband communication; CMOS logic circuits; CMOS technology; Circuit testing; Data communication; Digital systems; Integrated circuit technology; Inverters; Josephson junctions;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
