JPH0436661U - - Google Patents
Info
- Publication number
- JPH0436661U JPH0436661U JP7557190U JP7557190U JPH0436661U JP H0436661 U JPH0436661 U JP H0436661U JP 7557190 U JP7557190 U JP 7557190U JP 7557190 U JP7557190 U JP 7557190U JP H0436661 U JPH0436661 U JP H0436661U
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- reproducing apparatus
- sector
- comparator
- signal
- 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 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案を実施した情報記録再生装置の
２値化回路の回路図、第２図は第１図に示す回路
の動作を示した信号波形図、第３図は従来例の情
報記録再生装置の２値化回路の回路図、第４図は
従来の回路の信号波形図である。
１……加算回路、２……微分回路、３……ヒス
テリシスコンパレータ、Ｒ１〜Ｒ３……抵抗。
Fig. 1 is a circuit diagram of a binarization circuit of an information recording/reproducing apparatus implementing the present invention, Fig. 2 is a signal waveform diagram showing the operation of the circuit shown in Fig. 1, and Fig. 3 is a conventional information recording circuit. FIG. 4 is a circuit diagram of the binarization circuit of the reproducing device, and is a signal waveform diagram of the conventional circuit. 1...Addition circuit, 2...Differential circuit, 3...Hysteresis comparator, R1 to R3...Resistance.
Claims (1)
前記セクター検出をセクターマークの２値化検出
に基づいて行なう情報記録再生装置において、 情報記録媒体の再生信号を微分する手段と、 この微分信号を２値化する手段からなることを
特徴とする情報記録再生装置。 ２ 前記微分された再生信号をヒステリシスを持
つ比較演算器により２値化をすることを特徴とす
る請求項第１項記載の情報記録再生装置。 ３ 前記比較演算器のヒステリシス特性を前記微
分信号の直流成分に対して対称な特性とすること
を特徴とする請求項第２項記載の情報記録再生装
置。[Claims for Utility Model Registration] 1. In an information recording and reproducing apparatus that records and reproduces information sector by sector and detects sectors based on binary detection of sector marks, there is provided a means for differentiating a reproduced signal of an information recording medium; , An information recording and reproducing apparatus comprising means for binarizing this differential signal. 2. The information recording and reproducing apparatus according to claim 1, wherein the differentiated reproduction signal is binarized by a comparator having hysteresis. 3. The information recording and reproducing apparatus according to claim 2, wherein the hysteresis characteristic of the comparator is symmetrical with respect to the DC component of the differential signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7557190U JPH0436661U (en) | 1990-07-18 | 1990-07-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7557190U JPH0436661U (en) | 1990-07-18 | 1990-07-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436661U true JPH0436661U (en) | 1992-03-27 |
Family
ID=31616260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7557190U Pending JPH0436661U (en) | 1990-07-18 | 1990-07-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436661U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797182A (en) * | 1980-12-05 | 1982-06-16 | Brother Ind Ltd | Photoelectric reader |
-
1990
- 1990-07-18 JP JP7557190U patent/JPH0436661U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797182A (en) * | 1980-12-05 | 1982-06-16 | Brother Ind Ltd | Photoelectric reader |
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