DocumentCode
1012974
Title
AC erase head for cassette recorder
Author
Sawada, Takeshi ; Yoneda, Ko
Author_Institution
Canon Research Center, Canon, Inc., Meguro-ku, Tokyo Japan
Volume
21
Issue
5
fYear
1985
fDate
9/1/1985 12:00:00 AM
Firstpage
2104
Lastpage
2110
Abstract
A 70 dB erase ratio, the minimum practical for metal tapes, was obtained with ac erase magnetic heads of audio compact cassette recorders. Prerequisites for obtaining this level were the prevention of a "re-recording effect" and the selection of a gap configuration that would generate a highly efficient erase field. The relation between the erase effect and gap length has been clarified by the use of the finite element method; the number, depth, and length of the gaps have been determined. A practical design method for erase heads is also described.
Keywords
Magnetic recording/reading heads; Magnetic tape recording; Computer simulation; Design methodology; Dynamic range; Ferrites; Finite element methods; Frequency; Magnetic cores; Magnetic flux; Magnetic heads; Saturation magnetization;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.1985.1064047
Filename
1064047
Link To Document