A new A/D converter with quantum flux parametron
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6090851
A new flash-type superconducting A/D converter has been proposed. Basic low frequency operation of this converter, which comprises a Quantum Flux Parametron (QFP) and an rf SQUID, has been observed. The rf SQUID consists of a Josephson junction and a load inductor which is part of the QFP. It converts an analog signal to periodical digital signals of one quantum flux (2.07x10/sup -15/W b) per cycle. The QFP works as both an amplifier and a comparator of the periodical digital signals, by adding an exciting signal. This A/D converter is expected to achieve high speed operation of 20GHz by computer simulation. 4bit-A/D converter circuits were fabricated using the conventional Nb/Pb alloy process with a junction size of 5..mu..mx5..mu..m and supercurrent density of 200A/cm/sup 2/. Basic operation at 100kHz was confirmed experimentally.
- Research Organization:
- Quantum Magneto Flux Logic Project, Research Development Corp. of Japan, Kokubunji, Tokyo (JP); Dept. of information science, Univ. of Tokyo, Bunkyo, Tokyo (JP)
- OSTI ID:
- 6090851
- Report Number(s):
- CONF-880812-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: 25:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ALLOYS
AMPLIFIERS
ANALOG-TO-DIGITAL CONVERTERS
COMPUTERIZED SIMULATION
CURRENT DENSITY
DATA
DESIGN
DIGITAL SYSTEMS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
FLUXMETERS
INFORMATION
INTEGRATED CIRCUITS
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD ALLOYS
MAGNETIC FLUX
MEASURING INSTRUMENTS
MECHANICS
MICROELECTRONIC CIRCUITS
MICROWAVE EQUIPMENT
NIOBIUM ALLOYS
NUMERICAL DATA
QUANTUM MECHANICS
SIMULATION
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
420201* -- Engineering-- Cryogenic Equipment & Devices
656100 -- Condensed Matter Physics-- Superconductivity
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ALLOYS
AMPLIFIERS
ANALOG-TO-DIGITAL CONVERTERS
COMPUTERIZED SIMULATION
CURRENT DENSITY
DATA
DESIGN
DIGITAL SYSTEMS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
FLUXMETERS
INFORMATION
INTEGRATED CIRCUITS
JOSEPHSON JUNCTIONS
JUNCTIONS
LEAD ALLOYS
MAGNETIC FLUX
MEASURING INSTRUMENTS
MECHANICS
MICROELECTRONIC CIRCUITS
MICROWAVE EQUIPMENT
NIOBIUM ALLOYS
NUMERICAL DATA
QUANTUM MECHANICS
SIMULATION
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS