JPS6235469U - - Google Patents
Info
- Publication number
- JPS6235469U JPS6235469U JP12264885U JP12264885U JPS6235469U JP S6235469 U JPS6235469 U JP S6235469U JP 12264885 U JP12264885 U JP 12264885U JP 12264885 U JP12264885 U JP 12264885U JP S6235469 U JPS6235469 U JP S6235469U
- Authority
- JP
- Japan
- Prior art keywords
- stylus
- circuit
- stylus pressure
- signal
- pressure
- 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 8
- 241001422033 Thestylus Species 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Description
第１図は本考案のデイスク再生装置の針圧回路
の実施例を示すブロツク図、第２図は再生針とデ
イスクとの関係を拡大して示す斜視図、第３図は
再生針の駆動機構を示す斜視図、第４図は従来の
装置についてデイスクの面振れに対する針の追従
特性を測定した結果を示すグラフである。
２２……デイスク、２４……再生針、２５……
信号検出・増幅回路、３２……同調回路、３３…
…検波回路、３４……針圧調整回路、３５……シ
ステムコントローラ、３６……針圧コイル、３７
……基準電圧源。
Fig. 1 is a block diagram showing an embodiment of the stylus pressure circuit of the disc reproducing device of the present invention, Fig. 2 is an enlarged perspective view showing the relationship between the reproducing stylus and the disc, and Fig. 3 is the drive mechanism of the reproducing stylus. FIG. 4 is a graph showing the results of measuring the follow-up characteristics of the needle with respect to the surface runout of the disk for the conventional device. 22...Disc, 24...Regeneration needle, 25...
Signal detection/amplification circuit, 32... Tuning circuit, 33...
...Detection circuit, 34...Stylus pressure adjustment circuit, 35...System controller, 36...Stylus pressure coil, 37
...Reference voltage source.
Claims (1)
に接触して記録信号をピツクアツプするための再
生針と、この再生針を前記デイスク面に対して接
触させ針圧を加え又はその針圧を減少させるため
の針圧コイルと、前記再生針にてピツクアツプし
た信号を電気的な検出信号に変換するための検出
回路と、この検出回路からの検出信号を入力し前
記デイスクの特定の面振れ周波数の信号成分を取
り出すための同調回路と、この同調回路の出力を
検波するための検波回路と、再生時に通常は前記
針圧コイルに適正な針圧電流を供給すると共に前
記検波回路の出力レベルが基準レベル以上になつ
た時は前記針圧電流を増加させるための針圧調整
回路と、この針圧調整回路に針降下用及び針上昇
用の制御信号を与えて前記針圧調整回路の制御を
行うための制御手段とを具備したことを特徴とす
るデイスク再生装置の針圧回路。 A disk on which a signal is recorded, a playback stylus that contacts the disk surface to pick up the recorded signal, and a playback stylus that contacts the disk surface to apply stylus pressure or reduce the stylus pressure. a stylus pressure coil, a detection circuit for converting the signal picked up by the regeneration stylus into an electrical detection signal, and a detection signal from this detection circuit is inputted to detect a signal component of a specific surface runout frequency of the disk. and a detection circuit for detecting the output of this tuning circuit. During playback, normally an appropriate needle pressure current is supplied to the needle pressure coil and the output level of the detection circuit is equal to or higher than a reference level. a stylus pressure adjustment circuit for increasing the stylus pressure current; and a stylus pressure adjustment circuit for controlling the stylus pressure adjustment circuit by giving control signals for needle lowering and needle raising to this stylus pressure adjustment circuit. A stylus pressure circuit for a disc playback device, characterized in that it comprises a control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12264885U JPS6235469U (en) | 1985-08-12 | 1985-08-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12264885U JPS6235469U (en) | 1985-08-12 | 1985-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6235469U true JPS6235469U (en) | 1987-03-02 |
Family
ID=31013034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12264885U Pending JPS6235469U (en) | 1985-08-12 | 1985-08-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6235469U (en) |
-
1985
- 1985-08-12 JP JP12264885U patent/JPS6235469U/ja active Pending
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