Punchthrough in a three-junction SQUID
- 1 February 1982
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 40 (3) , 272-274
- https://doi.org/10.1063/1.93035
Abstract
Josephson latching logic devices can be powered by a bipolar trapezoidal waveform. Ideally, switched devices will always reset as the power supply reverses polarity. Under certain conditions, however, punchthrough can occur: a switched logic device fails to reset and proceeds into the next cycle in the nonzero voltage state. Original theory and experiment held that the punchthrough probability P should be identically zero provided the power supply transition time τ is greater than some critical value. The present experiment on a three-junction superconducting quantum interference device (SQUID) demonstrates, as more recent theories and simulations predict, that there is an exponential tail of P(τ) rather than an abrupt cutoff. We also find P can be strongly modulated by a small dc in the control line over the SQUID.Keywords
This publication has 11 references indexed in Scilit:
- Punchthrough in Josephson logic devicesIEEE Transactions on Magnetics, 1981
- Measurements of the effects of asymmetry in an on-chip regulated power distribution system using a dual trace Josephson sampling oscilloscopeIEEE Transactions on Magnetics, 1981
- Low-probability punchthrough in Josephson junctionsIEEE Transactions on Magnetics, 1981
- A Josephson ultrahigh-resolution sampling systemApplied Physics Letters, 1980
- Generation and measurement of ultrashort current pulses with Josephson devicesApplied Physics Letters, 1980
- Fabrication Process for Josephson Integrated CircuitsIBM Journal of Research and Development, 1980
- A 30-ps Josephson current injection logic (CIL)IEEE Journal of Solid-State Circuits, 1979
- Regulated AC power for Josephson interferometer latching logic circuitsIEEE Transactions on Magnetics, 1979
- Sub-100 ps experimental Josephson interferometer logic gatesIEEE Journal of Solid-State Circuits, 1978
- Switching to zero voltage in Josephson tunnel junctionsSolid State Communications, 1971