Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1983-07-25
1986-12-23
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307277, 307306, H03K 1792
Patent
active
046314237
ABSTRACT:
A circuit is provided for sampling and accurately reproducing unknown signals with picosecond resolution, which could be electrical, optical, x-ray, gamma ray, or particle signals. The circuit comprises a superconductive monitor gate having at least two states which are distinguishable from one another. The monitor gate could be, for example, comprised of a Josephson device or a superconducting quantum interference device (SQUID). Switching means, including a source of the unknown signal, are provided to switch the state of the monitor gate. This switching means includes a sampling pulse source and a bias current source which are combined with the unknown signal to change the state of the monitor gate. A noise elimination means is also provided including a lock-in amplifier, a comparator, and a feedback loop. A time averaging technique eliminates any incorrect indications resulting from noise. A timing means establishes a timing reference and sampling delay, and includes the sampling pulse source, delay lines, and a trigger pulse source connected to the source of the unknown signal and to the sampling pulse source. A display, such as an x-y recorder or oscilloscope, indicates the unknown signal. The circuit has applications in all devices where fast unknown waveform must be measured exactly, and in the field of non-equilibrium superconductivity, where exceptionally high resolution and sensitivity are required.
REFERENCES:
patent: 3689780 (1972-09-01), Meissner et al.
patent: 3761798 (1973-09-01), Silver et al.
patent: 3764905 (1973-10-01), Zappe
patent: 3913120 (1974-10-01), Lahiri
patent: 3983419 (1976-09-01), Fang
patent: 4401900 (1983-08-01), Faris
International Business Machines - Corporation
Stanland Jackson E.
Zazworsky John
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