JPH0352867U - - Google Patents
Info
- Publication number
- JPH0352867U JPH0352867U JP11180089U JP11180089U JPH0352867U JP H0352867 U JPH0352867 U JP H0352867U JP 11180089 U JP11180089 U JP 11180089U JP 11180089 U JP11180089 U JP 11180089U JP H0352867 U JPH0352867 U JP H0352867U
- Authority
- JP
- Japan
- Prior art keywords
- rectangular wave
- comparator
- detection circuit
- shapes
- dropout
- 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 5
- 230000000630 rising effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Television Signal Processing For Recording (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
第１図におけるタイミングチヤート、第３図は従
来のドロツプアウト検出回路のブロツク図、第４
図は第３図におけるタイミングチヤート、第５図
は従来における欠落部分をゼロクロス検出した場
合のタイミングチヤートである。
１……ドロツプアウト検出回路、２……入力端
子、３，９，１１……コンパレータ、４，５……
アンドゲート回路、７……出力端子、８，１０…
…積分回路。
Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a timing chart in Fig. 1, Fig. 3 is a block diagram of a conventional dropout detection circuit, and Fig. 4 is a block diagram of a conventional dropout detection circuit.
The figure shows a timing chart in FIG. 3, and FIG. 5 shows a timing chart when a missing portion is detected as a zero cross in the conventional method. 1... Dropout detection circuit, 2... Input terminal, 3, 9, 11... Comparator, 4, 5...
AND gate circuit, 7...output terminal, 8, 10...
...integrator circuit.
Claims (1)
に整形し、該矩形波の周期が所定時間を越えたと
き該記録信号のドロツプアウトを検出するドロツ
プアウト検出回路において、 前記記録信号を矩形波に整形するコンパレータ
と、 該コンパレータの入出力端子間に設けられ、立
上りしきい値及び立下りしきい値間にヒステリシ
スを設定する帰還回路と、 を有する構成としたドロツプアウト検出回路。[Claims for Utility Model Registration] A dropout detection circuit that shapes a recorded signal reproduced from an information recording medium into a rectangular wave and detects a dropout of the recorded signal when the period of the rectangular wave exceeds a predetermined time, A dropout detection circuit comprising: a comparator that shapes a recording signal into a rectangular wave; and a feedback circuit that is provided between input and output terminals of the comparator and sets hysteresis between a rising threshold and a falling threshold. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11180089U JPH0352867U (en) | 1989-09-25 | 1989-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11180089U JPH0352867U (en) | 1989-09-25 | 1989-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0352867U true JPH0352867U (en) | 1991-05-22 |
Family
ID=31660263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11180089U Pending JPH0352867U (en) | 1989-09-25 | 1989-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0352867U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100727571B1 (en) * | 2006-11-23 | 2007-06-14 | 주식회사현대밸브 | A butterfly valve attaching bypass valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935239A (en) * | 1982-08-24 | 1984-02-25 | Nec Corp | Microprogram control system |
| JPS6357873A (en) * | 1986-08-27 | 1988-03-12 | Japan Electronic Control Syst Co Ltd | Ignition device for internal combustion engine |
-
1989
- 1989-09-25 JP JP11180089U patent/JPH0352867U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5935239A (en) * | 1982-08-24 | 1984-02-25 | Nec Corp | Microprogram control system |
| JPS6357873A (en) * | 1986-08-27 | 1988-03-12 | Japan Electronic Control Syst Co Ltd | Ignition device for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100727571B1 (en) * | 2006-11-23 | 2007-06-14 | 주식회사현대밸브 | A butterfly valve attaching bypass valve |
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