JPS6283260U - - Google Patents
Info
- Publication number
- JPS6283260U JPS6283260U JP17561885U JP17561885U JPS6283260U JP S6283260 U JPS6283260 U JP S6283260U JP 17561885 U JP17561885 U JP 17561885U JP 17561885 U JP17561885 U JP 17561885U JP S6283260 U JPS6283260 U JP S6283260U
- Authority
- JP
- Japan
- Prior art keywords
- block
- synchronization signal
- gate
- counter
- signal detection
- 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 9
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Description
図面は本考案の一実施例を示すもので、第１図
は回路構成を示すブロツク図、第２図は動作を説
明するためのタイミングチヤートである。
１１…入力端子、１２…ブロツク同期信号検出
回路、１３…ゲート回路、１４…ブロツクカウン
タ、１５…同期信号検出カウンタ、１７…出力端
子、１８…Ｎ―ｍ検出回路、１９…ｍ検出回路、
２０…ｍ設定回路、２３…システムコントローラ
。
The drawings show one embodiment of the present invention; FIG. 1 is a block diagram showing the circuit configuration, and FIG. 2 is a timing chart for explaining the operation. 11...Input terminal, 12...Block synchronization signal detection circuit, 13...Gate circuit, 14...Block counter, 15...Synchronization signal detection counter, 17...Output terminal, 18...N-m detection circuit, 19...m detection circuit,
20...m setting circuit, 23...system controller.
Claims (1)
生する磁気記録再生装置で、上記デジタル信号が
ブロツク化され、各ブロツクにブロツク同期信号
が付加されたものにおいて、再生デジタル信号か
らブロツク同期信号を検出するブロツク同期信号
検出回路と、再生データに同期したクロツクで、
データビツト数をカウントするブロツクカウンタ
と、このブロツクカウンタのカウント値を検出し
て所定のタイミングでゲート信号を発生するゲー
ト信号発生手段と、この手段から出力されるゲー
ト信号によりゲート制御され、上記ブロツク同期
信号検出回路から出力されるブロツク同期信号を
正規の位置で検出するゲート回路と、このゲート
回路により正規のブロツク同期信号が検出されな
かつた回数をカウントする同期信号検出カウンタ
と、この同期信号検出カウンタのカウント値に応
じて上記ゲート信号発生手段から出力されるゲー
ト信号の幅を順次広げる手段とを具備したことを
特徴とするブロツク同期信号検出装置。 In a magnetic recording and reproducing device that reproduces a digital signal recorded on a magnetic recording medium, the digital signal is divided into blocks and a block synchronization signal is added to each block, and the block synchronization signal is detected from the reproduced digital signal. With a block synchronization signal detection circuit and a clock synchronized with the reproduced data,
A block counter that counts the number of data bits, a gate signal generation means that detects the count value of this block counter and generates a gate signal at a predetermined timing, and is gate-controlled by the gate signal output from this means, and the block A gate circuit that detects a block synchronization signal output from a synchronization signal detection circuit at a regular position, a synchronization signal detection counter that counts the number of times a regular block synchronization signal is not detected by this gate circuit, and this synchronization signal detection circuit. A block synchronization signal detection device comprising means for sequentially widening the width of the gate signal output from the gate signal generation means in accordance with the count value of the counter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17561885U JPS6283260U (en) | 1985-11-15 | 1985-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17561885U JPS6283260U (en) | 1985-11-15 | 1985-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6283260U true JPS6283260U (en) | 1987-05-27 |
Family
ID=31115110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17561885U Pending JPS6283260U (en) | 1985-11-15 | 1985-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6283260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07296517A (en) * | 1994-04-26 | 1995-11-10 | Nec Ic Microcomput Syst Ltd | Disk controller |
-
1985
- 1985-11-15 JP JP17561885U patent/JPS6283260U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07296517A (en) * | 1994-04-26 | 1995-11-10 | Nec Ic Microcomput Syst Ltd | Disk controller |
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