JPH03115915U - - Google Patents
Info
- Publication number
- JPH03115915U JPH03115915U JP2185590U JP2185590U JPH03115915U JP H03115915 U JPH03115915 U JP H03115915U JP 2185590 U JP2185590 U JP 2185590U JP 2185590 U JP2185590 U JP 2185590U JP H03115915 U JPH03115915 U JP H03115915U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- output
- reproduced
- peak hold
- 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
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000002401 inhibitory effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案の一実施例にかかる信号再生回
路を示すブロツク図、第２図は第１図の回路の動
作を説明するための動作波形図、第３図はＣＬＶ
方式で駆動する光デイスクのセクタ配置を説明す
るための概略図、第４図は隣接トラツクのプリフ
オーマツト部により未記録領域の再生信号に生じ
るクロストーク成分を説明するための動作波形図
、第５図は信号再生回路の従来例を示すブロツク
図、第６図は第５図の回路の動作を説明するため
の動作波形図、第７図は信号再生回路の他の従来
例を示すブロツク図である。
１……二値化回路、２……信号弁別回路、３…
…アンド回路、６，７……抵抗、１１……ピーク
ホールド回路、１２……ゼロクロスコンパレータ
、１３，１５……コンパレータ、１４……モノマ
ルチ回路、１６……アナログスイツチ、１７……
ダイオード、１８……充電抵抗、１９……コンデ
ンサ、２０……放電抵抗、２１……ボルテージフ
オロワ回路。
FIG. 1 is a block diagram showing a signal reproducing circuit according to an embodiment of the present invention, FIG. 2 is an operation waveform diagram for explaining the operation of the circuit in FIG. 1, and FIG. 3 is a CLV.
FIG. 4 is a schematic diagram for explaining the sector arrangement of an optical disk driven by this method, and FIG. 4 is an operation waveform diagram for explaining the crosstalk component generated in the reproduced signal of the unrecorded area by the preformat section of the adjacent track. 6 is a block diagram showing a conventional example of a signal reproducing circuit, FIG. 6 is an operation waveform diagram for explaining the operation of the circuit in FIG. 5, and FIG. 7 is a block diagram showing another conventional example of a signal reproducing circuit. . 1...Binarization circuit, 2...Signal discrimination circuit, 3...
...AND circuit, 6,7...Resistor, 11...Peak hold circuit, 12...Zero cross comparator, 13,15...Comparator, 14...Mono multi circuit, 16...Analog switch, 17...
Diode, 18...Charging resistor, 19...Capacitor, 20...Discharging resistor, 21...Voltage follower circuit.
Claims (1)
二値化する二値化回路と、再生信号のピーク値を
検出するピークホールド回路と、このピークホー
ルド回路の出力レベルを所定の分割比で分圧する
分圧回路と、上記ピークホールド回路のピーク値
検出動作を光ピツクアツプ装置のデータ書込期間
で禁止する禁止手段と、再生信号の信号レベルが
上記分圧回路の出力レベルよりも大きいときには
ゲート信号を出力する信号弁別回路と、この信号
弁別回路からゲート信号が出力されているときに
は上記二値化回路の出力データを再生データとし
て出力するゲート回路を備えたことを特徴とする
信号再生回路。 A binarization circuit that binarizes the reproduced signal output from the optical pickup device, a peak hold circuit that detects the peak value of the reproduced signal, and a voltage divider that divides the output level of this peak hold circuit at a predetermined division ratio. a circuit, an inhibiting means for inhibiting the peak value detection operation of the peak hold circuit during the data writing period of the optical pickup device, and outputting a gate signal when the signal level of the reproduced signal is higher than the output level of the voltage dividing circuit. A signal reproducing circuit comprising: a signal discriminating circuit; and a gate circuit that outputs output data of the binarization circuit as reproduced data when a gate signal is output from the signal discriminating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2185590U JPH03115915U (en) | 1990-03-06 | 1990-03-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2185590U JPH03115915U (en) | 1990-03-06 | 1990-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03115915U true JPH03115915U (en) | 1991-12-02 |
Family
ID=31524886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2185590U Pending JPH03115915U (en) | 1990-03-06 | 1990-03-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03115915U (en) |
-
1990
- 1990-03-06 JP JP2185590U patent/JPH03115915U/ja active Pending
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