JPS5939423U

JPS5939423U - Write circuit in flexible disk device

Info

Publication number: JPS5939423U
Application number: JP13430282U
Authority: JP
Inventors: 谷添　利生
Original assignee: 株式会社日立製作所
Priority date: 1982-09-06
Filing date: 1982-09-06
Publication date: 1984-03-13

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の書込、読出し回路図、第２
図は同じくヘッド模型図、第３図は同じく信号書込、読
出し波形図である。１・・・ＡＮＤゲート、２・・・分周器、３・・・イン
バーター、４・・・トランジスタ、５・・・トランジス
タ、６゜７、　８．　９・・・抵抗器、１０・・・半固
定抵抗器、１１゜１２・・・抵抗器、１３・・・半固定
抵抗器、１４・・・抵抗器、１５・・・信号ヘッド、１
６・・・消去ヘッド、１７・・・読出し増幅器、１８・
・・比較器、１９・・・ＡＮＤゲート、２０・・・切替
スイッチ、２１．２２・・・抵抗器、１５ａ・・・信号
ヘッドコイル、１６ａ・・・消去ヘッドコイル。Fig. 1 is a write/read circuit diagram of an embodiment of the present invention;
This figure is also a head model diagram, and FIG. 3 is a signal write and read waveform diagram. 1...AND gate, 2...Frequency divider, 3...Inverter, 4...Transistor, 5...Transistor, 6°7, 8. 9...Resistor, 10...Semi-fixed resistor, 11°12...Resistor, 13...Semi-fixed resistor, 14...Resistor, 15...Signal head, 1
6... Erase head, 17... Read amplifier, 18.
... Comparator, 19... AND gate, 20... Selector switch, 21.22... Resistor, 15a... Signal head coil, 16a... Erasing head coil.

Claims

[Scope of utility model registration request]

In a flexible disk drive having a magnetic head having a structure in which a write/read head and an erase head having a center tap coil are located close to each other, a circuit for writing digital signals thereto, a circuit for reading digital signals therefrom, and an erasing circuit that performs erasing using direct current, A write circuit in a flexible disk device, characterized in that the write currents flowing through the separate write and rad coils are unbalanced.