JPS62186205U

JPS62186205U -

Info

Publication number: JPS62186205U
Application number: JP7303986U
Authority: JP
Priority date: 1986-05-15
Filing date: 1986-05-15
Publication date: 1987-11-26

Description

[Brief explanation of the drawing]

第１図はこの考案の磁気記録再生装置における
書き込み電流自動調整装置のブロツク図、第２図
はこの書き込み電流自動調整装置で使用するマイ
コンのフローチヤート、第３図は磁気記録媒体で
ある磁気デイスクのオーバーライト特性を示す図
、第４図は同じくレゾリユーシヨン特性を示す図
である。１……ライトロジツク回路、２……ライトドラ
イブ回路、３……コモンドライブ回路、４……メ
カニズム装置、５……リード／ライトヘツド、６
……磁気記録媒体である磁気デイスク、７……リ
ードアンプ、８……信号発信回路、９……書き込
み電流設定回路、１０……マイコン、１１……オ
ーバーライト特性のＮＧ表示装置、１２……レゾ
リユーシヨン特性のＮＧ表示装置。 Fig. 1 is a block diagram of the automatic write current adjustment device in the magnetic recording/reproducing device of this invention, Fig. 2 is a flowchart of the microcomputer used in this automatic write current adjustment device, and Fig. 3 is a magnetic disk which is a magnetic recording medium. FIG. 4 is a diagram showing the overwrite characteristics, and FIG. 4 is a diagram also showing the resolution characteristics. DESCRIPTION OF SYMBOLS 1...Write logic circuit, 2...Write drive circuit, 3...Common drive circuit, 4...Mechanism device, 5...Read/write head, 6
. . . Magnetic disk as a magnetic recording medium, 7 . . . Read amplifier, 8 . . . Signal transmission circuit, 9 . NG display device with resolution characteristics.

Claims

[Scope of utility model registration request]

a write logic circuit having respective input terminals for a write pulse and a write gate pulse; a write drive circuit having an input terminal to which an output signal from one output terminal of the write logic circuit is applied; and another output terminal of the write logic circuit. A common drive circuit has an input terminal to which output signals from the common drive circuit are applied, and a read/write head to which output signals from the write drive circuit and the common drive circuit are respectively applied, and drives the read/write head and the magnetic recording medium. A magnetic recording/reproducing device comprising a mechanism device for amplifying a read signal from the read/write head, and a signal generating circuit for generating a signal having a frequency twice that of a reference signal applied to the write logic circuit; a write current setting circuit that sets a write current using a control signal and applies the same to the write drive circuit;
A microcomputer is added that operates to apply a control signal for the write current to the write current setting circuit when it is determined that both the overwrite characteristics and the resolution characteristics have become optimal by changing the write current in stages. A write current automatic adjustment device in a magnetic recording/reproducing device.