JPS5814279U - Servo truck writer - Google Patents
Servo truck writerInfo
- Publication number
- JPS5814279U JPS5814279U JP10597781U JP10597781U JPS5814279U JP S5814279 U JPS5814279 U JP S5814279U JP 10597781 U JP10597781 U JP 10597781U JP 10597781 U JP10597781 U JP 10597781U JP S5814279 U JPS5814279 U JP S5814279U
- Authority
- JP
- Japan
- Prior art keywords
- reference clock
- level
- servo pattern
- servo
- gain control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Position Or Direction (AREA)
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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
、第１図は本考案の一実施例を示すブロック図である。
１・・・・・・基準クロック用ヘッド、２・・・・・・
前置増幅器、３・・・・・・増幅部、４および５・・・
・・・レベル検出器、６および７・・・・・・カウンタ
、８・・・・・・演算器、９・・・・・・ディジタルア
ナログコンバータ、１０・・・・・・パルス整形部、１
１・・・中サーボパターン用ヘッド、１２・・・・・・
サーボパターン書込回路、１００・・・・・・入力端子
、１０１・・・・・・ゲインコントロール端子。, FIG. 1 is a block diagram showing an embodiment of the present invention. 1...Reference clock head, 2...
Preamplifier, 3...Amplification section, 4 and 5...
... Level detector, 6 and 7 ... Counter, 8 ... Arithmetic unit, 9 ... Digital analog converter, 10 ... Pulse shaping section, 1
1... Head for medium servo pattern, 12...
Servo pattern writing circuit, 100...input terminal, 101...gain control terminal.
Claims (1)
された基準クロックをゲインコントロール端子に供給さ
れるゲインコントロール信号に応じて増幅する増幅部と
、増幅された前記基準クロ゛ ツクのレベルが予め定
められた第１のレベルよりも大のときに計数する第１の
カウンタと、増幅された前記基準クロックのレベルが前
記第１のレベルよりも小さな予め定められた第２のレベ
ルよりも大のときに計数する第２のカウンタと、前記第
１のカウンタ値が前記基準クロックのクロック数から前
記第２のカウンタ値を差し引いた値より大であるか否か
を示すディジタル信号を発生する演算器と、前記ディジ
タル信号に応じたゲインコントロール信号を発生するデ
ィジタルアナログコンバータと、増幅された前記基準ク
ロックを整形するパルス整形部と、整形された前記基準
クロックに従ってサーボパターンを前記サーボパターン
領域に書き込むサーボパターン書込回路とを含びことを
特徴とするサーボトラックライタ。an amplifying section that amplifies a reference clock read out and supplied from a track outside the servo pattern area in accordance with a gain control signal supplied to a gain control terminal; and a level of the amplified reference clock is predetermined. a first counter that counts when the level of the amplified reference clock is greater than a predetermined second level that is less than the first level; a second counter for counting; and an arithmetic unit for generating a digital signal indicating whether the first counter value is greater than a value obtained by subtracting the second counter value from the number of clocks of the reference clock; a digital-to-analog converter that generates a gain control signal according to the digital signal; a pulse shaping section that shapes the amplified reference clock; and a servo pattern writer that writes a servo pattern in the servo pattern area in accordance with the shaped reference clock. A servo track writer characterized by comprising a built-in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10597781U JPS5814279U (en) | 1981-07-16 | 1981-07-16 | Servo truck writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10597781U JPS5814279U (en) | 1981-07-16 | 1981-07-16 | Servo truck writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5814279U true JPS5814279U (en) | 1983-01-28 |
Family
ID=29900492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10597781U Pending JPS5814279U (en) | 1981-07-16 | 1981-07-16 | Servo truck writer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814279U (en) |
-
1981
- 1981-07-16 JP JP10597781U patent/JPS5814279U/en active Pending
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