NDLI: Read/write characteristics and noise properties of a thin film VCR head

Content Provider	IEEE Xplore Digital Library
Author	Sugiyama, Y. Ohmori, H. Kobayashi, T. Yamamoto, T. Shoji, M. Okazaki, Y. Hayashi, K.
Copyright Year	1965
Abstract	The read/write characteristics and noise properties of the Embedded Thin Film (ETF) head, in which the size of the magnetic core is minimized by using a thin film coil are investigated and compared with those of a Metal in Gap (MIG) head. The small core size results in a smaller increase of impedance noise and it is clearly indicated that reducing the impedance noise is important in improving the Signal-to-Noise Ratio (SNR) over a wide frequency range, because the impedance noise has a greater effect over 30 MHz. In the writing process, a ghost pattern is found to be recorded by a fringing field from the spacer of the multiple-layered magnetic core, which results in a broadening of the isolated pulse. In spite of the ghost, however, the recording properties at a high frequency are not degraded, probably because the influence of the fringing field is small at a high frequency. As a result, the SNR of the ETF head is improved by 2.7 dB over the range of 1-40 MHz compared with that of the MIG head.
Sponsorship	IEEE Magnetics Society
Starting Page	172
Ending Page	177
Page Count	6
File Size	816834
File Format	PDF
ISSN	00189464
Volume Number	32
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transistors Video recording Magnetic noise Signal to noise ratio Magnetic heads Magnetic cores Impedance Noise reduction Frequency Magnetic films
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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