JPS6399340U - - Google Patents
Info
- Publication number
- JPS6399340U JPS6399340U JP19514386U JP19514386U JPS6399340U JP S6399340 U JPS6399340 U JP S6399340U JP 19514386 U JP19514386 U JP 19514386U JP 19514386 U JP19514386 U JP 19514386U JP S6399340 U JPS6399340 U JP S6399340U
- Authority
- JP
- Japan
- Prior art keywords
- tape
- speed
- drum
- magnetic tape
- search
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Description
図面はこの考案の一実施例を示すもので、第１
図はその回路構成を示すブロツク図、第２図は早
送りサーチ時の動作処理の内容を示すタイミング
チヤートである。
１１……再生釦、１２……早送りサーチ釦、１
３……巻戻しサーチ釦、１４……制御部、１５…
…テープ残量検出回路、１６……プリセツト値メ
モリ、１７……相対速度検出回路、１８，２５…
…ドライバ、１９，２０……ゲート回路１９、２
１……加減算回路、２２，２４……ラツチ回路、
２３……速度誤差検出カウンタ、２６，２８……
リール、２７，２９……周波数ジエネレータ、３
０……ドラムモータ、３１……Ｄ／Ａ変換回路３
１、３２……周波数ジエネレータ（ＦＧ）、３３
……フイルタ、３４……リールモータ。
The drawing shows one embodiment of this invention.
The figure is a block diagram showing the circuit configuration, and FIG. 2 is a timing chart showing the contents of the operation processing during fast forward search. 11...Play button, 12...Fast forward search button, 1
3...Rewind search button, 14...Control unit, 15...
...Tape remaining amount detection circuit, 16...Preset value memory, 17...Relative speed detection circuit, 18, 25...
...Driver, 19, 20...Gate circuit 19, 2
1... Addition/subtraction circuit, 22, 24... Latch circuit,
23... Speed error detection counter, 26, 28...
Reel, 27, 29...Frequency generator, 3
0...Drum motor, 31...D/A conversion circuit 3
1, 32...Frequency generator (FG), 33
...Filter, 34...Reel motor.
Claims (1)
出して供給側リールあるいは巻取側リールに巻装
されている磁気テープ量を演算により算出するテ
ープ量演算手段と、 該テープ量演算手段で算出されたテープ量から
テープ終端の近傍を判定し、回転ヘツドドラムの
回転速度を高速サーチ時の回転速度から低速サー
チ時の回転速度へと段階的に移行させるドラム制
御手段と、 再生信号から磁気テープとドラムの相対速度を
検出する相対速度検出手段と、 相対速度検出手段の検出結果に応じて相対速度
が略一定となるように高速サーチ時の磁気テープ
速度をドラムの回転速度変化に対応して徐々に低
速サーチ時の磁気テープ速度へと移行させるテー
プ移送手段と を具備したことを特徴とするサーボ制御装置。[Scope of Claim for Utility Model Registration] In a rotating head type magnetic tape playback device, the amount of magnetic tape wound on the supply reel or the take-up reel is determined by detecting the rotational speed of the supply reel or the take-up reel. A tape amount calculation means that calculates the tape amount by calculation, and determines the vicinity of the end of the tape from the tape amount calculated by the tape amount calculation means, and changes the rotation speed of the rotary head drum from the rotation speed during high speed search to the rotation speed during low speed search. a drum control means for detecting the relative speed of the magnetic tape and the drum in stages; a relative speed detection means for detecting the relative speed of the magnetic tape and the drum from a playback signal; A servo control device comprising tape transport means for gradually shifting the magnetic tape speed during a search to the magnetic tape speed during a low-speed search in response to changes in the rotational speed of a drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19514386U JPS6399340U (en) | 1986-12-18 | 1986-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19514386U JPS6399340U (en) | 1986-12-18 | 1986-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6399340U true JPS6399340U (en) | 1988-06-28 |
Family
ID=31152762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19514386U Pending JPS6399340U (en) | 1986-12-18 | 1986-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6399340U (en) |
-
1986
- 1986-12-18 JP JP19514386U patent/JPS6399340U/ja active Pending
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