ANALYSIS OF A DIGITAL SQUID ELECTRONICS SYSTEM

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Authors
  1. Wilson, H.S.
  2. Dustan, B.W.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Esquimalt Defence Research Detachment of Defence Research Establishment Atlantic has developed a SQUID electronics package for flight tests of a superconducting magnetic gradiometer. We present here the results of an extensive, detailed study of the electronics which was done to ensure that output noise originating in the SQUID electronics would be understood before any flight tests were performed. The report describes in general terms of the operation of SQUID feedback electronics and the microprocessor-based digital system used by EDRD. There are detailed discussions of noise levels, maximum slew rates and nonlinear effects originating in the SQUID and in the electronics. To aid in understanding the system, the electronics were simulated with a computer program. The agreement between the simulation program and the observed electronic performance indicates that the system is understood. It is concluded that the digital system will be adequate, but that special care will be required to reduce noise due to reverse-gain errors and digital-to-analogue converter errors.
Report Number
DREA-TM-96-249 — Technical Memorandum
Date of publication
01 Oct 1996
Number of Pages
50
DSTKIM No
97-03024
CANDIS No
503120
Format(s):
Hardcopy;Document Image stored on Optical Disk

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