NDLI: 3.69 GHz single flux quantum pseudorandom bit sequence generator fabricated with Nb/AlO/sub x//Nb

Content Provider	IEEE Xplore Digital Library
Author	Kang, J.H. Przybysz, J.X. Martinet, S.S. Worsham, A.H. Miller, D.L. McCambridge, J.D.
Copyright Year	2002
Abstract	A 4 bit 15 sequence SFQ (Single Flux Quantum) pseudorandom bit sequence generator was built with an eight-level Nb/AlO/sub x//Nb Josephson junction integrated circuit process. An SFQ circuit was built into the code generator to enable a rapid restart. The test results showed that the circuit operated correctly at the seed of 3.69 GHz. The XNOR gate and shift register worked correctly at 5 GHz. However, the back delay was longer than 200 psec and the generator acted as a 5 bit 21 sequence code generator at this frequency. At 200 MHz, the code generator was operated continuously to observe its stability. Over the course of two and one half hours, the circuit made only five code errors, indicating a bit error rate of 3/spl times/10/sup -12/. At 2 GHz we collected 10 million samples on the 4023rd bit of the sequence. No wrong signal values were observed, indicating the bit error rate is less than 5/spl times/10/sup -11/ at this frequency.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2673
Ending Page	2676
Page Count	4
File Size	846925
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Niobium Shift registers Josephson junctions Switches Circuit testing Logic circuits Frequency Bit error rate Spread spectrum communication Modems
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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