JPS623607U

JPS623607U -

Info

Publication number: JPS623607U
Application number: JP9317685U
Authority: JP
Priority date: 1985-06-20
Filing date: 1985-06-20
Publication date: 1987-01-10

Description

[Brief explanation of the drawing]

第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案の一実施例に係る磁気再生装置の
構成を示すブロツク図、第３図は第２図の一部を
詳細に示す回路図、第４図は第２図の一部を詳細
に示すブロツク図、第５図及び第６図は第２図の
装置の動作を説明するための信号タイミング図、
第７図はＭＲ再生ヘツドの構造を示す斜視図、第
８図はマルチトラツクＭＲ再生装置の従来例を示
す回路図、第９図はＩＣ内蔵再生ヘツドの構造を
示す斜視図、第１０図は時分割マルチトラツク再
生装置の従来例を示す構成ブロツク図である。Ｘ……ＭＲ再生ヘツドチツプ、Ｙ……内蔵用Ｉ
Ｃチツプ、Ｚ……出力端子群、ＭＲ_１〜ＭＲｎ、
Ｈ……ＭＲ素子、ａ……前置増幅回路、ｂ……マ
ルチプレクサ、ｃ……終段増幅回路、ｄ……制御
回路、ｆ……順次選択制御回路、ｏｐ……演算増
幅器、Ｑ_２１〜Ｑ_２８……スイツチングトランジ
スタ、ＳＲ_１〜ＳＲ_４……シフトレジスタ、ＣＮ
……カウンタ、ＳＣＬＫ……クロツク信号、ＳＲ
ＳＴ……リセツト信号、Ａ……磁性基板、Ｂ，Ｃ
……ヨーク、Ｇ……バイアス用電流導体、ｇ……
磁気ギヤツプ、Ｓ_１〜Ｓｎ……定電流源、Ｘ_１…
…ＭＲ再生ヘツド群、ＡＭ_１〜ＡＭｎ……再生増
幅回路、Ａ_１……ＭＲ再生ヘツドチツプ、Ｂ_１…
…マルチプレクサＩＣ。 Figure 1 is a functional block diagram showing the configuration of the present invention.
Fig. 2 is a block diagram showing the configuration of a magnetic reproducing device according to an embodiment of the present invention, Fig. 3 is a circuit diagram showing a part of Fig. 2 in detail, and Fig. 4 shows a part of Fig. 2. A detailed block diagram, FIGS. 5 and 6 are signal timing diagrams for explaining the operation of the device shown in FIG.
FIG. 7 is a perspective view showing the structure of an MR playback head, FIG. 8 is a circuit diagram showing a conventional example of a multi-track MR playback device, FIG. 9 is a perspective view showing the structure of a playback head with built-in IC, and FIG. 1 is a configuration block diagram showing a conventional example of a time-division multitrack playback device; FIG. X...MR reproduction head chip, Y...Built-in I
C chip, Z...output terminal group, _MR1 to MRn,
H...MR element, a...preamplifier circuit, b...multiplexer, c...final stage amplifier circuit, d...control circuit, f...sequential selection control circuit, op...operational amplifier, _Q21 ~ _Q28 ...Switching transistor, _SR1 to _SR4 ...Shift register, CN
... Counter, SCLK ... Clock signal, SR
ST...Reset signal, A...Magnetic substrate, B, C
... Yoke, G ... Current conductor for bias, g ...
Magnetic gap, S ₁ to Sn...constant current source, X ₁ ...
...MR reproduction head group, _AM1 to AMn...Reproduction amplifier circuit, _A1 ...MR reproduction head chip, _B1 ...
...Multiplexer IC.

Claims

[Claims for Utility Model Registration] 1. n magnetoelectric conversion elements for reproducing digital signals recorded on n tracks of a magnetic medium, and a device provided corresponding to each of the n magnetoelectric conversion elements. a switching means for sequentially selecting and multiplexing output signals from the n preamplifiers, and dividing the n magnetoelectric conversion elements and preamplifiers into m pieces. The magnetic regenerative amplifier, which includes a magnetic regenerative amplifier, a selection means for selecting the m magnetic regenerative amplifiers, and the preamplifier sequentially selected by the switching means, is selected before being selected by the switching means. and a control means for controlling the selection means to make a selection by the selection means. 2. The magnetic reproducing device according to claim 1, wherein the magnetoelectric conversion element is a magnetoresistive element. 3. The magnetic reproducing device according to claim 1, wherein the magnetic medium is a magnetic tape. 4. The magnetic reproducing device according to claim 1, wherein the magnetic medium is a magnetic disk.