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Accession Number:
AD0670157
Title:
RELAXATION OSCILLATIONS IN JOSEPHSON JUNCTIONS.
Corporate Author:
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Report Date:
1968-02-01
Abstract:
Investigation of the characteristics of Josephson tunneling in tintin oxidetin junctions showed that pulse voltages with sharp rise times were being generated. Pulse amplitude across the junction remained constant and equal to the energy gap voltage V sub g, but pulse frequency could be changed over a 251 range by a change in bias voltage from 0 to an upper limit approximately equal to V sub g2. The oscillation mechanism is that of switching between the pair-current state of the junction at V 0 and the quasi-particle current state at V V sub g. The external circuit maintains the switching cycle and determines the output frequency characteristics. Using the LR time constant of the external circuit and the assumed basic dc IV curve of the junction in the absence of relaxation oscillations, calculations were made that accurately describe the observed dc IV curves, frequency, and waveforms, including their dependence on bias voltage and magnetic field. Author
Descriptive Note:
Rept. for Jun-Oct 67,
Pages:
0021
Contract Number:
F04695-67-C-0158
File Size:
0.00MB
