JPH0581961B2 - - Google Patents
Info
- Publication number
- JPH0581961B2 JPH0581961B2 JP60285699A JP28569985A JPH0581961B2 JP H0581961 B2 JPH0581961 B2 JP H0581961B2 JP 60285699 A JP60285699 A JP 60285699A JP 28569985 A JP28569985 A JP 28569985A JP H0581961 B2 JPH0581961 B2 JP H0581961B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- recording
- constant current
- erasing
- semiconductor switches
- 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.)
- Expired - Lifetime
Links
- 239000004065 semiconductor Substances 0.000 claims description 66
- 230000007423 decrease Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 12
- 230000003247 decreasing effect Effects 0.000 description 11
- 230000002238 attenuated effect Effects 0.000 description 5
- 239000013256 coordination polymer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Digital Magnetic Recording (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28569985A JPS62145503A (ja) | 1985-12-20 | 1985-12-20 | 磁気消去装置 |
| US06/922,049 US4821127A (en) | 1985-10-18 | 1986-10-20 | Demagnetizing apparatus for erasing signals recorded on concentric tracks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28569985A JPS62145503A (ja) | 1985-12-20 | 1985-12-20 | 磁気消去装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62145503A JPS62145503A (ja) | 1987-06-29 |
| JPH0581961B2 true JPH0581961B2 (pl) | 1993-11-17 |
Family
ID=17694883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28569985A Granted JPS62145503A (ja) | 1985-10-18 | 1985-12-20 | 磁気消去装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62145503A (pl) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01243203A (ja) * | 1988-03-24 | 1989-09-27 | Fuji Photo Film Co Ltd | 磁気消去方法 |
| JPH04170704A (ja) * | 1990-11-05 | 1992-06-18 | Nec Gumma Ltd | 磁気記憶装置 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517908A (ja) * | 1974-07-09 | 1976-01-22 | Sharp Kk | Eizokirokusaiseisochino shokyokairo |
-
1985
- 1985-12-20 JP JP28569985A patent/JPS62145503A/ja active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517908A (ja) * | 1974-07-09 | 1976-01-22 | Sharp Kk | Eizokirokusaiseisochino shokyokairo |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62145503A (ja) | 1987-06-29 |
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