JPS565A - Reproducing unit for recording disc - Google Patents
Reproducing unit for recording discInfo
- Publication number
- JPS565A JPS565A JP7339379A JP7339379A JPS565A JP S565 A JPS565 A JP S565A JP 7339379 A JP7339379 A JP 7339379A JP 7339379 A JP7339379 A JP 7339379A JP S565 A JPS565 A JP S565A
- Authority
- JP
- Japan
- Prior art keywords
- stylus
- signal
- pressure
- change
- disc
- 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
Abstract
PURPOSE: To make constant the pressure relation between the disc surface and the stylus and to lower the mechanical impedance of the reproducing pickup stylus substantially, by picking up the change in the stylus pressure as a signal and operating the driving unit with the signal.
CONSTITUTION: The uneven signal recorded on the disc 2 is traced with the reproducing stylus 7, the pressure change of the stylus produced with the uneven signal is converted into electric signal with the mechanical-electro conversion element, and amplification is made so that desired output can be obtained with the head amplifier 11. The reproduced output signal is obtained at the output terminal of the signal processing circuit 12. A part of the signal 20 amplified at the amplifier 11 picks up the envelope of the signal at the envelope detector 14. In this case, when the stylus 7 keeps the desired stylus pressure, the output signal 19 of the detector 14 is a given voltage value, but if the stylys pressure is subjected to change due to the surface oscillation of the disc 2, the signal 19 changes with the period of the change in the stylus pressure. Further, the current corresponding to the change in the stylus pressure flows to the coil 8, allowing to operate the permanent magnet 6 and control the stylus pressure to a constant value through the set of the stylus pressure to a desired value.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7339379A JPS565A (en) | 1979-06-11 | 1979-06-11 | Reproducing unit for recording disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7339379A JPS565A (en) | 1979-06-11 | 1979-06-11 | Reproducing unit for recording disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS565A true JPS565A (en) | 1981-01-06 |
Family
ID=13516901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7339379A Pending JPS565A (en) | 1979-06-11 | 1979-06-11 | Reproducing unit for recording disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS565A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4795992A (en) * | 1985-12-16 | 1989-01-03 | Murata Manufacturing Co., Ltd. | Mount for dielectric coaxial resonators |
-
1979
- 1979-06-11 JP JP7339379A patent/JPS565A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4795992A (en) * | 1985-12-16 | 1989-01-03 | Murata Manufacturing Co., Ltd. | Mount for dielectric coaxial resonators |
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