JPS6133275U - track access device - Google Patents

track access device

Info

Publication number
JPS6133275U
JPS6133275U JP11508684U JP11508684U JPS6133275U JP S6133275 U JPS6133275 U JP S6133275U JP 11508684 U JP11508684 U JP 11508684U JP 11508684 U JP11508684 U JP 11508684U JP S6133275 U JPS6133275 U JP S6133275U
Authority
JP
Japan
Prior art keywords
pickup
moving speed
current moving
current
access device
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
Application number
JP11508684U
Other languages
Japanese (ja)
Inventor
弘行 平野
文彦 横川
Original Assignee
パイオニア株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社 filed Critical パイオニア株式会社
Priority to JP11508684U priority Critical patent/JPS6133275U/en
Publication of JPS6133275U publication Critical patent/JPS6133275U/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例を示すブロック図、第２図は
本考案の一実施例におけるトラック横切信号検出回路の
回路図、第３図は本考案の一実施例における方向判別回
路の回路図、第４図および第５図は本考案の一実施例の
作用の説明に供する波形図、第６図は本考案の一実施例
の変形例における主要部の回路図、第７図は本考案の一
実施例における方向判別回路の他の例を示す回路区、第
８図は従来例の回路図、第９図はトラックアクセス装置
の作用説明図である。 １・・・ディスク、２・・・スピンドルモータ、３・・
・ピッ−クアップ、４・・・リニアモータ、６・・・検
出回路、７・・・半径差カウンタ、８・・・制御回路、
９・・・変換回路、１０・・・速度検出回路、１１・・
・差動増幅回路、１２・・・．ドライブ回路、１３・・
・速度交差検出回路、１４・・・一定加速度信号発生回
路、１５・・・切換スイツチ。FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a circuit diagram of a track crossing signal detection circuit in one embodiment of the present invention, and FIG. 3 is a direction discrimination circuit in one embodiment of the present invention. FIGS. 4 and 5 are waveform diagrams for explaining the operation of an embodiment of the present invention. FIG. 6 is a circuit diagram of main parts in a modified example of an embodiment of the present invention. FIG. 8 is a circuit diagram showing another example of the direction determining circuit according to an embodiment of the present invention, FIG. 8 is a circuit diagram of a conventional example, and FIG. 9 is an explanatory diagram of the operation of the track access device. 1...Disc, 2...Spindle motor, 3...
・Pickup, 4... Linear motor, 6... Detection circuit, 7... Radius difference counter, 8... Control circuit,
9... Conversion circuit, 10... Speed detection circuit, 11...
・Differential amplifier circuit, 12... Drive circuit, 13...
- Speed crossing detection circuit, 14... constant acceleration signal generation circuit, 15... changeover switch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 同心円またはスパイラル状のトラックを有する記録媒体
から前記記録媒体の情報を読み取るピックアップを前記
トラックを横切る方向に駆動する駆動手段を備え、ピッ
クアップの目標位置と現在位置との相対位置を検出し、
検出した前記相対位置に対応した目標速度信号とピック
アップの現移動速度信号とが一致するまでピックアップ
を所定の加速度にて駆動し、目標速度信号とピックアッ
プの現移動速度とが一致したとき目標速度にピックアッ
プの現移動速度を追従させるように前記駆動手段を制御
するトラックアクセス装置において、ピックアップの現
在位置と現移動速度とをピックアップからの再生出力中
から検出することを特徴とするトラックアクセス装置。comprising a driving means for driving a pickup that reads information on the recording medium from a recording medium having concentric or spiral tracks in a direction across the tracks, detecting the relative position between the target position and the current position of the pickup;
The pickup is driven at a predetermined acceleration until the target speed signal corresponding to the detected relative position matches the current moving speed signal of the pickup, and when the target speed signal and the current moving speed of the pickup match, the target speed is reached. A track access device that controls the driving means to follow the current moving speed of the pickup, characterized in that the current position and current moving speed of the pickup are detected from the reproduction output from the pickup.
JP11508684U 1984-07-30 1984-07-30 track access device Pending JPS6133275U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11508684U JPS6133275U (en) 1984-07-30 1984-07-30 track access device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11508684U JPS6133275U (en) 1984-07-30 1984-07-30 track access device

Publications (1)

Publication Number Publication Date
JPS6133275U true JPS6133275U (en) 1986-02-28

Family

ID=30674074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11508684U Pending JPS6133275U (en) 1984-07-30 1984-07-30 track access device

Country Status (1)

Country Link
JP (1) JPS6133275U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172296U (en) * 1983-05-02 1984-11-17 小松ゼノア株式会社 fracturing pump
JPH0871505A (en) * 1994-09-06 1996-03-19 Miike Tekkosho Kk Selector rotor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5564661A (en) * 1978-11-08 1980-05-15 Toshiba Corp Self-compensator for magnetic disk memory unit
JPS5641535A (en) * 1979-09-07 1981-04-18 Toshiba Corp Recording track detection circuit of optical disk
JPS57176568A (en) * 1981-04-22 1982-10-29 Pioneer Electronic Corp Relative movement controller between pickup and recording track for information reader

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5564661A (en) * 1978-11-08 1980-05-15 Toshiba Corp Self-compensator for magnetic disk memory unit
JPS5641535A (en) * 1979-09-07 1981-04-18 Toshiba Corp Recording track detection circuit of optical disk
JPS57176568A (en) * 1981-04-22 1982-10-29 Pioneer Electronic Corp Relative movement controller between pickup and recording track for information reader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59172296U (en) * 1983-05-02 1984-11-17 小松ゼノア株式会社 fracturing pump
JPS6235909Y2 (en) * 1983-05-02 1987-09-11
JPH0871505A (en) * 1994-09-06 1996-03-19 Miike Tekkosho Kk Selector rotor

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