JPS55125532A - Magnetic recorder/reproducer - Google Patents
Magnetic recorder/reproducerInfo
- Publication number
- JPS55125532A JPS55125532A JP3156179A JP3156179A JPS55125532A JP S55125532 A JPS55125532 A JP S55125532A JP 3156179 A JP3156179 A JP 3156179A JP 3156179 A JP3156179 A JP 3156179A JP S55125532 A JPS55125532 A JP S55125532A
- Authority
- JP
- Japan
- Prior art keywords
- head
- height position
- heads
- detected
- basic surface
- 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.)
- Granted
Links
Abstract
PURPOSE: To use a head for both recording and reproduction and to reduce the number of heads, by detecting a height position from the rotary surface of a rotary magnetic head mounted on the movable element, and controlling the height position of the head.
CONSTITUTION: The lower surface 12a of the upper rotary drum 12 is made a basic surface, heads 20 and 21 which are opposite to each other and cross at right angles with each other are used in order to detect the height position from the basic surface of the heads 16 and 17, and the magnetic flux which is generated by the signal current of the head 20 is detected by the head 21. The amplitude of this detective output is detected 24, also the phase is detected 26, and the correcting signal of the polarity corresponding to deviation of the height position of the head 16 or 17 is obtained in accordance with both the detective outputs. In accordance with the aforesaid correcting signal, voltage is applied to the electrode of the bimorph plate 14, and the height position of the head 16 or 17 is controlled so as to be the basic surface.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3156179A JPS55125532A (en) | 1979-03-16 | 1979-03-16 | Magnetic recorder/reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3156179A JPS55125532A (en) | 1979-03-16 | 1979-03-16 | Magnetic recorder/reproducer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55125532A true JPS55125532A (en) | 1980-09-27 |
JPS6255205B2 JPS6255205B2 (en) | 1987-11-18 |
Family
ID=12334579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3156179A Granted JPS55125532A (en) | 1979-03-16 | 1979-03-16 | Magnetic recorder/reproducer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55125532A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2512247A1 (en) * | 1981-08-28 | 1983-03-04 | Ampex | SYSTEM AND METHOD FOR POSITIONING A STRUCTURE OF RECORDING / REPRODUCTION HEADS |
JPH04134616A (en) * | 1990-09-21 | 1992-05-08 | Victor Co Of Japan Ltd | Position detecting system for recording/reproducing element |
US5384676A (en) * | 1991-04-19 | 1995-01-24 | Mitsubishi Denki Kabushiki Kaisha | Magnetic head position controller in a magnetic recording and reproducing apparatus |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0290816A (en) * | 1988-09-28 | 1990-03-30 | Hitachi Ltd | Method and circuit for correcting error |
JPH03132974A (en) * | 1989-10-18 | 1991-06-06 | Hitachi Ltd | Code error correction device |
JPH04176061A (en) * | 1990-11-07 | 1992-06-23 | Matsushita Electric Ind Co Ltd | Data-signal reproducing apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61267918A (en) * | 1986-05-23 | 1986-11-27 | Sony Corp | Magnetic recording/reproducing device |
-
1979
- 1979-03-16 JP JP3156179A patent/JPS55125532A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61267918A (en) * | 1986-05-23 | 1986-11-27 | Sony Corp | Magnetic recording/reproducing device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2512247A1 (en) * | 1981-08-28 | 1983-03-04 | Ampex | SYSTEM AND METHOD FOR POSITIONING A STRUCTURE OF RECORDING / REPRODUCTION HEADS |
JPH04134616A (en) * | 1990-09-21 | 1992-05-08 | Victor Co Of Japan Ltd | Position detecting system for recording/reproducing element |
US5384676A (en) * | 1991-04-19 | 1995-01-24 | Mitsubishi Denki Kabushiki Kaisha | Magnetic head position controller in a magnetic recording and reproducing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6255205B2 (en) | 1987-11-18 |
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