High-speed switching and logic circuits using Josephson devices
The use of Josephson devices as switching components for computer circuits was investigated including a study of the switching properties of the superconductor-semiconductor-superconductor junction. The switching speeds of a single junction and a basic memory cell computed by numerical methods are comparable with the corresponding values for oxide-barrier junctions. Having a much lower Q than the conventional oxide-barrier junction, the junction should not show the previously experienced difficulties caused by junction resonances. The damping of plasma oscillations in the semiconductor junction is also more effective, leading to a shorter switching time. A new type of logic gate employing Josephson devices was investigated. This circuit would automatically unlatch after each operation, thus requiring no external means for resetting. Numerical analysis predicts subnanosecond switch-reset operation for appropriate parameter choices. The qualitative behavior of the circuit was also shown with a mechanical analog. (auth)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-33-017099
- OSTI ID:
- 4107146
- Journal Information:
- IEEE Trans. Magn., v. MAG-11, no. 2, pp. 770-773, Conference: Applied superconductivity conference, Oakbrook, Illinois, USA, 30 Sep 1974; Other Information: See CONF-740957--. Orig. Receipt Date: 30-JUN-76
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420201* -Engineering-Facilities & Equipment-Cryogenic & Superconducting Equipment & Devices
*JOSEPHSON JUNCTIONS- ELECTRICAL PROPERTIES
*LOGIC CIRCUITS- JOSEPHSON JUNCTIONS
COMPUTERS
EQUIVALENT CIRCUITS
MEMORY DEVICES
OSCILLATIONS
QUALITY FACTOR
SOLID-STATE PLASMA
SWITCHING CIRCUITS