JPH0352839U

JPH0352839U -

Info

Publication number: JPH0352839U
Application number: JP11200689U
Authority: JP
Priority date: 1989-09-25
Filing date: 1989-09-25
Publication date: 1991-05-22

Description

[Brief explanation of drawings]

第１図はこの考案のトラツキング制御装置の一
実施例の構成を示す回路図、第２図は第１図の実
施例のアフターレコーデイング時における動作を
説明するタイミングチヤート、第３図は第１図の
アンプの通常再生時における出力特性図、第４図
は第１図のアンプのアフターレコーデイング時に
おける出力特性図、第５図はＲ−ＤＡＴのトラツ
キング制御用のパイロツト信号の記録パターンを
説明する図、第６図は回転ヘツドとトラツクのト
レース状態を説明する図、第７図は通常再生時に
おける回転ヘツドとトラツクのトレース状態を説
明する図、第８図はアフターレコーデイング時に
おける回転ヘツドとトラツクのトレース状態を説
明する図、第９図は従来のトラツキング制御装置
の一例の構成を示す回路図、第１０図は第９図の
例の通常再生時における動作を説明するタイミン
グチヤート、第１１図は第９図の例のアフターレ
コーデイング時における動作を説明するタイミン
グチヤート、第１２図は第９図の例のアンプの出
力特性図である。３……スイツチ、４……基準電圧発生器、５…
…アンプ、６……スイツチ、７……コンデンサ、
８……アンプ、１１……スイツチ、１２……基準
電圧発生器、１３……アンプ、２１……基準電圧
発生器、２２……スイツチ。 FIG. 1 is a circuit diagram showing the configuration of an embodiment of the tracking control device of this invention, FIG. 2 is a timing chart illustrating the operation of the embodiment of FIG. 1 during after-recording, and FIG. 3 is a diagram similar to the one shown in FIG. FIG. 4 is an output characteristic diagram of the amplifier shown in FIG. 1 during normal playback, FIG. 4 is an output characteristic diagram of the amplifier shown in FIG. 1 during after-recording, and FIG. 5 is a diagram explaining the recording pattern of the pilot signal for tracking control of R-DAT. , FIG. 6 is a diagram explaining the trace state of the rotary head and track, FIG. 7 is a diagram explaining the trace state of the rotary head and track during normal playback, and FIG. 8 is a diagram explaining the trace state of the rotary head and track during after-recording. 9 is a circuit diagram illustrating the configuration of an example of a conventional tracking control device, FIG. 10 is a timing chart illustrating the operation of the example in FIG. 9 during normal playback, and FIG. 11 is a diagram illustrating the trace state. FIG. 9 is a timing chart illustrating the operation during after-recording in the example shown in FIG. 9, and FIG. 12 is an output characteristic diagram of the amplifier in the example shown in FIG. 3...Switch, 4...Reference voltage generator, 5...
...Amplifier, 6...Switch, 7...Capacitor,
8...Amplifier, 11...Switch, 12...Reference voltage generator, 13...Amplifier, 21...Reference voltage generator, 22...Switch.

Claims

[Claims for Utility Model Registration] Pilot signals for tracking are recorded between three adjacent tracks so that most of their recording positions do not overlap when viewed from a direction substantially perpendicular to the tracks. A tracking control device for controlling the position of the head relative to the track that has been tracked, comprising: a clamp circuit that clamps a signal corresponding to a tracking error of the head relative to the track to a predetermined clamp potential at a predetermined timing; and an output of the clamp circuit. , and a sample hold circuit that samples and holds the sample at a predetermined timing, the clamp circuit includes a first reference voltage generator that sets the clamp potential to a first reference potential during normal playback, and a first reference voltage generator that sets the clamp potential to a first reference potential during after-recording mode. A tracking control device comprising: a second reference voltage generator that sets the clamp potential to a second reference potential; and a switch that switches between the first reference potential and the second reference potential.