NDLI: Test and evaluation of bubble memories

Content Provider	IEEE Xplore Digital Library
Author	Bahm, E.
Copyright Year	1965
Abstract	Since January, 1977, a test and evaluation program has been conducted at the Jet Propulsion Laboratory to determine the potential usefulness of bubble memories for spacecraft and commercial applications. The memories evaluated were commercially available units which are similar to a NASA-developed memory cell. It is planned to also test other memories as they become available from manufacturers. Objectives of the test program were to determine: (1) Long-term stability of memory performance. (2) Margins of power supply voltages and bias field. (3) Data pattern sensitivity. (4) Memory performance over specified temperature range. (5) Memory performance in vacuum. The memory was found to operate reliably over long periods of time. No aging or wear-out was detected during one year of operation. Margins of power supply voltages and bias field were acceptable, but quite narrow at the low end of the temperature range. In addition, the error rate was found to be strongly data-pattern sensitive. The error rate of one memory improved considerably if it was operated continuously for long periods of time. The other memory did not show this characteristic. With the evaluated memories comparing favorably with other mass memories, such as tape recorders, bubble memories are now considered viable candidates for future spacecraft applications.
Sponsorship	IEEE Magnetics Society
Starting Page	300
Ending Page	302
Page Count	3
File Size	446489
File Format	PDF
ISSN	00189464
Volume Number	14
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1978-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Testing Power supplies Voltage Temperature distribution Temperature sensors Error analysis Propulsion Laboratories Aircraft manufacture Manufacturing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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