Driving system for multiple magnetic head

Abstract

Abstract PURPOSE:To simplify circuit constitution by supplying a common bias winding with an AC bias current which has a superposed direct current, and then supplying a unidirectional signal current to each magnetic head. CONSTITUTION:Waveforms of recording currents supplied from amplifiers A1- Ak are supplied as unidirectional pulse currents to signal windings n1-Nk of respective magnetic heads M1-Mk. As an AC bias, the current consisting of the current of a high-frequency bias power source B and a DC current from a DC voltage source E is supplied to a bias winding nb. In this case, the DC current is set to cancel a residual magnetism component, so no residual magnetism component in a polarized state remains on a magnetic tape Ta.

Inventors

• 👤 Satoru Seko
• 👤 悟 世古
• 👤 Junkichi Sugita
• 👤 杉田　順吉
• 👤 Hiroyuki Uchida
• 👤 裕之 内田
• 👤 Tetsuo Sekiya
• 👤 哲夫 関谷

Bibliographic Details