DocumentCode
1023036
Title
Chaos and bifurcation in Josephson voltage-controlled oscillators
Author
Smith, A.D. ; Sandell, R.D. ; Silver, A.H. ; Burch, J.F.
Author_Institution
TRW Space and Technology Group, Redondo Beach, CA
Volume
23
Issue
2
fYear
1987
fDate
3/1/1987 12:00:00 AM
Firstpage
1267
Lastpage
1270
Abstract
We report the performance of a Josephson Voltage-controlled oscillator consisting of a tunnel junction shunted by a small inductor in series with a small bias resistor (a resistive SQUID circuit). The circuit displayed regions of stability, bifurcation, and chaos as a function of bias conditions and circuit parameters. We measured narrow band coupled power levels of 25 pW in the fundamental mode and 50 pW in the first subharmonic mode over a 10% frequency band at approximately 9 GHz. Linewidths were dominated by the thermal noise of the bias resistor. These results are in qualitative agreement with numerical simulations, which also show progressive bifurcations from fundamental to chaotic trajectories.
Keywords
Chaos; Josephson device oscillators; VCO; Voltage-controlled oscillator (VCO); Bifurcation; Chaos; Circuit stability; Frequency measurement; Inductors; Narrowband; Power measurement; Resistors; SQUIDs; Voltage-controlled oscillators;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1987.1064914
Filename
1064914
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