JPS62147148U - - Google Patents
Info
- Publication number
- JPS62147148U JPS62147148U JP1986160203U JP16020386U JPS62147148U JP S62147148 U JPS62147148 U JP S62147148U JP 1986160203 U JP1986160203 U JP 1986160203U JP 16020386 U JP16020386 U JP 16020386U JP S62147148 U JPS62147148 U JP S62147148U
- Authority
- JP
- Japan
- Prior art keywords
- output signal
- low
- peak value
- outputs
- turned
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
- G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
Description
第１図は、本考案の正トラツキング表示回路の
全体ブロツク図、第２図は、第１図のピーク値検
出及び維持回路、レベルシフト回路及び、低域通
過フイルターの一例を示す詳細回路図、第３図は
、テープのローデイング及び走行初期においてサ
ーボシステム及び、走行系が不安定な状態になる
場合のビデオヘツドのトレース軌跡と、この場合
の再生出力信号波形を示す図、第４図は、サーボ
システム及び走行系が安定して、それぞれのビデ
オヘツドがテープの該当トラツクを正確にトレー
スする場合のビデオヘツドのトレース軌跡と、こ
の場合の再生出力信号波形を示す図、第５図は、
第１図の低域通過フイルターの出力信号波形を示
す図である。
図中、１：ピーク値検出及び維持回路、２：レ
ベルシフト回路、３：低域通過フイルター、４：
差動増幅器、Ｑ１：トランジスター、ＬＥＤ：ト
ラツキング表示用発光ダイオード。
FIG. 1 is an overall block diagram of the positive tracking display circuit of the present invention, and FIG. 2 is a detailed circuit diagram showing an example of the peak value detection and maintenance circuit, level shift circuit, and low-pass filter of FIG. FIG. 3 is a diagram showing the trace locus of the video head when the servo system and running system become unstable at the beginning of tape loading and running, and the playback output signal waveform in this case. FIG. 5 is a diagram showing the tracing locus of the video head and the playback output signal waveform in this case when the servo system and running system are stable and each video head accurately traces the corresponding track on the tape.
FIG. 2 is a diagram showing an output signal waveform of the low-pass filter of FIG. 1; In the figure, 1: peak value detection and maintenance circuit, 2: level shift circuit, 3: low pass filter, 4:
Differential amplifier, Q1 : transistor, LED: light emitting diode for tracking display.
補正 昭６２．４．１４
実用新案登録請求の範囲を次のように補正する
。Amendment April 14, 1982 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
ビデオヘツドから再生されて出力される再生出
力信号Ｒ０のピークツーピーク値を検出した後、
その状態を一定時間維持して、出力するピーク値
検出及び維持回路１と、該ピーク値検出及び維持
回路１の出力信号を一定レベル低下させて出力す
るレベルシフト回路２と、前記再生出力信号Ｒ０
中、低域周波数信号だけ通過させる低域通過フイ
ルター３と、前記レベルシフト回路２の出力信号
と該低域通過フイルター３の出力信号との差電圧
を増幅して出力する差動増幅器４と、該差動増幅
器４から出力される高電位信号又は、低電位信号
によりオン又は、オフされるトランジスターＱ１
と、該トランジスターＱ１のオン又はオフにより
点燈又は、消燈されるトラツキング状態表示用発
光ダイオードＬＥＤとで構成されたことを特徴と
するビデオテープレコーダのトラツキング状態表
示回路。[Claims for Utility Model Registration] After detecting the peak-to-peak value of the reproduced output signal R0 reproduced and output from the video head,
A peak value detection and maintenance circuit 1 that maintains this state for a certain period of time and outputs it, a level shift circuit 2 that reduces the output signal of the peak value detection and maintenance circuit 1 by a certain level and outputs it, and the reproduced output signal R 0
A low pass filter 3 that passes only middle and low frequency signals, and the output signal of the level shift circuit 2.
and a differential amplifier 4 that amplifies and outputs the difference voltage between the output signal of the low-pass filter 3 and the output signal of the low-pass filter 3, and is turned on or off by a high potential signal or a low potential signal output from the differential amplifier 4. Transistor Q 1
1. A tracking state display circuit for a video tape recorder, comprising: and a tracking state display light emitting diode LED which is turned on or off when the transistor Q1 is turned on or off.
Claims (1)
力信号Ｒ０のピークツーピーク値を検出した後、
その状態を一定時間維持して、出力するピーク値
検出及び維持回路１と、該ピーク値検出及び維持
回路１の出力信号を一定レベル低下させて出力す
るレベルシフト回路２と、前記再生出力信号Ｒ０
中、低域周波数信号だけ通過させる低域通過フイ
ルター３と、前記レベルシフト回路２の出力信号
及び該低域通過フイルター３の出力信号との差電
圧を増幅して出力する差動増幅器４と、該差動増
幅器４から出力される高電位信号又は、低電位信
号によりオン又は、オフされるトランジスターＱ
１と、該トランジスターＱ１のオン又はオフによ
り点燈又は、消燈されるトラツキング状態表示用
発光ダイオード（ＬＥＤ）とで構成されたことを
特徴とするビデオテープレコーダのトラツキング
状態表示回路。 After detecting the peak-to-peak value of the reproduced output signal R0 reproduced and output from the video head,
A peak value detection and maintenance circuit 1 that maintains this state for a certain period of time and outputs it, a level shift circuit 2 that reduces the output signal of the peak value detection and maintenance circuit 1 by a certain level and outputs it, and the reproduced output signal R 0
a low-pass filter 3 that passes only middle and low frequency signals; a differential amplifier 4 that amplifies and outputs the difference voltage between the output signal of the level shift circuit 2 and the output signal of the low-pass filter 3; A transistor Q that is turned on or off by a high potential signal or a low potential signal output from the differential amplifier 4.
1 , and a tracking state display light emitting diode (LED) that is turned on or off when the transistor Q1 is turned on or off.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019850013743U KR900008853Y1 (en) | 1985-10-21 | 1985-10-21 | Fine tracking indicator in video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62147148U true JPS62147148U (en) | 1987-09-17 |
| JPH054111Y2 JPH054111Y2 (en) | 1993-02-01 |
Family
ID=19245991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986160203U Expired - Lifetime JPH054111Y2 (en) | 1985-10-21 | 1986-10-21 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH054111Y2 (en) |
| KR (1) | KR900008853Y1 (en) |
-
1985
- 1985-10-21 KR KR2019850013743U patent/KR900008853Y1/en not_active IP Right Cessation
-
1986
- 1986-10-21 JP JP1986160203U patent/JPH054111Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR900008853Y1 (en) | 1990-09-28 |
| KR870007268U (en) | 1987-05-11 |
| JPH054111Y2 (en) | 1993-02-01 |
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