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Title: Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components

Abstract

Architecture for frequency multiplexing multiple flux locked loops in a system comprising an array of DC SQUID sensors. The architecture involves dividing the traditional flux locked loop into multiple unshared components and a single shared component which, in operation, form a complete flux locked loop relative to each DC SQUID sensor. Each unshared flux locked loop component operates on a different flux modulation frequency. The architecture of the present invention allows a reduction from 2N to N+1 in the number of connections between the cryogenic DC SQUID sensors and their associated room temperature flux locked loops. Furthermore, the 1.times.N architecture of the present invention can be paralleled to form an M.times.N array architecture without increasing the required number of flux modulation frequencies.

Inventors:
 [1]
  1. Independence, MO
Publication Date:
Research Org.:
Kansas City Plant (KCP), Kansas City, MO (United States)
OSTI Identifier:
874279
Patent Number(s):
US 6356078
Assignee:
Honeywell International Inc. (Morris Township, NJ)
DOE Contract Number:  
AC04-76DP00613
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
frequency; multiplexed; flux; locked; loop; architecture; providing; array; dc; squids; shared; unshared; components; multiplexing; multiple; loops; comprising; squid; sensors; involves; dividing; traditional; single; component; operation; form; complete; sensor; operates; modulation; allows; reduction; 2n; n1; connections; cryogenic; associated; temperature; furthermore; 1timesn; paralleled; mtimesn; increasing; required; frequencies; /324/505/

Citation Formats

Ganther, Jr., Kenneth R., and Snapp, Lowell D. Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components. United States: N. p., 2002. Web.
Ganther, Jr., Kenneth R., & Snapp, Lowell D. Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components. United States.
Ganther, Jr., Kenneth R., and Snapp, Lowell D. Tue . "Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components". United States. https://www.osti.gov/servlets/purl/874279.
@article{osti_874279,
title = {Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components},
author = {Ganther, Jr., Kenneth R. and Snapp, Lowell D},
abstractNote = {Architecture for frequency multiplexing multiple flux locked loops in a system comprising an array of DC SQUID sensors. The architecture involves dividing the traditional flux locked loop into multiple unshared components and a single shared component which, in operation, form a complete flux locked loop relative to each DC SQUID sensor. Each unshared flux locked loop component operates on a different flux modulation frequency. The architecture of the present invention allows a reduction from 2N to N+1 in the number of connections between the cryogenic DC SQUID sensors and their associated room temperature flux locked loops. Furthermore, the 1.times.N architecture of the present invention can be paralleled to form an M.times.N array architecture without increasing the required number of flux modulation frequencies.},
doi = {},
url = {https://www.osti.gov/biblio/874279}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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Works referenced in this record:

A Digital Flux-Locked Loop for High Temperature SQUID Magnetometer and Gradiometer Systems with Field Cancellation
book, January 2000


Sequential read-out architecture for multi-channel SQUID systems
journal, June 1999


Integrated dc SQUID magnetometer with a high slew rate
journal, June 1984


Squid Fundamentals
book, January 1996


Advanced Squid Read-Out Electronics
book, January 1996


Some Broad-Band Transformers
journal, August 1959