NL8003646A - Werkwijze en digitale magnetische registratie- -inrichting met hoogfrequente polarisatie. - Google Patents
Werkwijze en digitale magnetische registratie- -inrichting met hoogfrequente polarisatie. Download PDFInfo
- Publication number
- NL8003646A NL8003646A NL8003646A NL8003646A NL8003646A NL 8003646 A NL8003646 A NL 8003646A NL 8003646 A NL8003646 A NL 8003646A NL 8003646 A NL8003646 A NL 8003646A NL 8003646 A NL8003646 A NL 8003646A
- Authority
- NL
- Netherlands
- Prior art keywords
- signal
- recording
- polarization
- phase
- transitions
- Prior art date
Links
- 230000010287 polarization Effects 0.000 title claims description 96
- 238000000034 method Methods 0.000 title claims description 15
- 230000007704 transition Effects 0.000 claims description 79
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims 2
- 230000000875 corresponding effect Effects 0.000 description 9
- 230000005415 magnetization Effects 0.000 description 8
- 230000002349 favourable effect Effects 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/03—Biasing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Magnetic Recording (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7917172 | 1979-07-02 | ||
| FR7917172A FR2460522A1 (fr) | 1979-07-02 | 1979-07-02 | Procede et dispositif d'enregistrement magnetique numerique avec polarisation a haute frequence |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8003646A true NL8003646A (nl) | 1981-01-06 |
Family
ID=9227405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8003646A NL8003646A (nl) | 1979-07-02 | 1980-06-24 | Werkwijze en digitale magnetische registratie- -inrichting met hoogfrequente polarisatie. |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4383281A (enExample) |
| JP (1) | JPS5611610A (enExample) |
| DE (1) | DE3025045A1 (enExample) |
| FR (1) | FR2460522A1 (enExample) |
| GB (1) | GB2055238B (enExample) |
| IT (1) | IT1131891B (enExample) |
| NL (1) | NL8003646A (enExample) |
| SE (1) | SE447767B (enExample) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4420776A (en) * | 1981-11-30 | 1983-12-13 | International Business Machines | PSK Modulation in AC bias data recording |
| JPS601956A (ja) * | 1983-06-17 | 1985-01-08 | Sony Corp | デイジタルデ−タの変調方法 |
| DE3533447A1 (de) * | 1985-09-19 | 1987-03-26 | Tandberg Data | Verfahren und anordnung zum aufzeichnen von daten auf einem magnetischen aufzeichnungstraeger |
| DE3533454A1 (de) * | 1985-09-19 | 1987-03-26 | Tandberg Data | Verfahren und anordnung zur aufzeichnung und wiedergabe von daten |
| DE3633269A1 (de) * | 1986-09-30 | 1988-03-31 | Tandberg Data | Verfahren und anordnung zum aufzeichnen von digitalen daten auf einen magnetischen aufzeichnungstraeger |
| US4845573A (en) * | 1986-10-06 | 1989-07-04 | Tandberg Data A/S | System with filter system for improved reliability for recording data on a magnetic recording medium |
| DE3827370A1 (de) * | 1988-08-12 | 1990-02-15 | Broadcast Television Syst | Schaltungsanordnung zur aufzeichnung von digitalen signalen |
| US5083349A (en) * | 1991-03-08 | 1992-01-28 | Talon, Inc. | Slide fastener slider |
| US6650493B2 (en) * | 2000-03-31 | 2003-11-18 | Seagate Technology Llc | Pulsed write current adapted for use with a field maintenance current in a data storage device |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215779A (en) * | 1961-02-24 | 1965-11-02 | Hallicrafters Co | Digital data conversion and transmission system |
| US3641524A (en) * | 1966-11-07 | 1972-02-08 | Leach Corp | Magnetic record and reproduce system for digital data having a nrzc format |
| US3551816A (en) * | 1969-03-10 | 1970-12-29 | T O Paine | Digital synchronizer |
| GB1333951A (en) | 1971-03-08 | 1973-10-17 | Standard Telephones Cables Ltd | Electrical supervisory system |
| US3792454A (en) * | 1972-01-03 | 1974-02-12 | Honeywell Inf Systems | Magnetic strorage system using alternate codes to reduce write current bias |
| US3789380A (en) * | 1972-02-18 | 1974-01-29 | Ibm | Digital recording at twice nyquist bandwidth |
| US3980824A (en) * | 1974-10-29 | 1976-09-14 | Motorola, Inc. | Modulator demodulator for binary digitally encoded messages |
| US3952329A (en) * | 1975-02-06 | 1976-04-20 | International Business Machines Corporation | Pulse compression recording |
| US4017903A (en) * | 1975-08-27 | 1977-04-12 | Hewlett-Packard Company | Pulse code modulation recording and/or reproducing system |
| JPS5836403B2 (ja) * | 1976-04-19 | 1983-08-09 | 日本電信電話株式会社 | デジタル信号の磁気記録法 |
| US4202017A (en) * | 1978-05-08 | 1980-05-06 | Sperry Rand Corporation | Magnetic recording signal equalization apparatus |
| US4234897A (en) * | 1978-10-05 | 1980-11-18 | Ampex Corporation | DC Free encoding for data transmission |
| FR2459529A1 (fr) * | 1979-06-18 | 1981-01-09 | Cii Honeywell Bull | Procede et dispositif d'enregistrement magnetique numerique avec polarisation a haute frequence |
-
1979
- 1979-07-02 FR FR7917172A patent/FR2460522A1/fr active Granted
-
1980
- 1980-06-24 US US06/162,421 patent/US4383281A/en not_active Expired - Lifetime
- 1980-06-24 NL NL8003646A patent/NL8003646A/nl not_active Application Discontinuation
- 1980-06-25 SE SE8004696A patent/SE447767B/sv not_active IP Right Cessation
- 1980-06-27 GB GB8021094A patent/GB2055238B/en not_active Expired
- 1980-07-02 IT IT23200/80A patent/IT1131891B/it active
- 1980-07-02 DE DE19803025045 patent/DE3025045A1/de active Granted
- 1980-07-02 JP JP8928880A patent/JPS5611610A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2460522A1 (fr) | 1981-01-23 |
| DE3025045C2 (enExample) | 1990-05-31 |
| JPS5611610A (en) | 1981-02-05 |
| SE8004696L (sv) | 1981-01-03 |
| GB2055238A (en) | 1981-02-25 |
| DE3025045A1 (de) | 1981-01-15 |
| IT8023200A0 (it) | 1980-07-02 |
| FR2460522B1 (enExample) | 1983-07-22 |
| US4383281A (en) | 1983-05-10 |
| GB2055238B (en) | 1983-07-20 |
| IT1131891B (it) | 1986-06-25 |
| SE447767B (sv) | 1986-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A85 | Still pending on 85-01-01 | ||
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| BV | The patent application has lapsed |