Title :
Thin film magnetic head for high definition VCR
Author :
Miura, M. ; Saito, M. ; Arai, N. ; Konishi, K. ; Nagatomo, H.O. ; Tsuchiya, T. ; Takahashi, H.
Author_Institution :
Hitachi Ltd., Yokohama, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
A type of low-noise thin film head has been developed for wide band high-definition (HD) VCR. The head has nearly 0.1% of the yoke volume of conventional metal-in-gap (MIG) heads and a nonmagnetic substrate. The head inductance has been reduced with conservation of the reproducing efficiency. As a result, the head has about 4 dB higher C/√L and 2 to 4 dB higher carrier to noise ratio than those of MIG heads at 25 MHz and 23.2 m/s. The high C/√L ratio is caused not only by minimization of the yoke, but also by the effect of the magnetic anisotropy
Keywords :
magnetic heads; magnetic recording; magnetic thin film devices; video recording; video tape recorders; 25 MHz; head inductance; high definition VCR; inductive head; low-noise thin film head; magnetic anisotropy; magnetic head; nonmagnetic substrate; yoke minimisation; High definition video; Inductance; Magnetic films; Magnetic heads; Magnetic noise; Signal to noise ratio; Substrates; Transistors; Video recording; Wideband;
Journal_Title :
Magnetics, IEEE Transactions on
