境界変位型磁気録音ヘツド

抄録

This report describes boundary displacement typemagnetic recording, mainly its BD heads. The magneti ccircuits of BD head were analyzed and then what spoils the linearity of BD head was explained theoretically and experimentally. Thus, god linearity of BD head was obtained by saturating laminated core tip and by contacting the biasing magnet on the core directly without yoke. This saturation increased the sensitivity of boundary displacement vs. signal current. As to the frequency response of BD head, the Ioss was decreased up to the value of-4.5 db at 10kc byusing ferrite coreinstead ofnon-laminated core. Aiso reported inthis paperare multi-channel headsand special BD head.