FR2004020A1 - - Google Patents
Info
- Publication number
- FR2004020A1 FR2004020A1 FR6907366A FR6907366A FR2004020A1 FR 2004020 A1 FR2004020 A1 FR 2004020A1 FR 6907366 A FR6907366 A FR 6907366A FR 6907366 A FR6907366 A FR 6907366A FR 2004020 A1 FR2004020 A1 FR 2004020A1
- Authority
- FR
- France
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/34—Indicating arrangements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71354768A | 1968-03-15 | 1968-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2004020A1 true FR2004020A1 (fr) | 1969-11-14 |
Family
ID=24866566
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6907366A Withdrawn FR2004020A1 (fr) | 1968-03-15 | 1969-03-14 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3540022A (fr) |
DE (1) | DE1912893A1 (fr) |
FR (1) | FR2004020A1 (fr) |
GB (1) | GB1215128A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4414589A (en) * | 1981-12-14 | 1983-11-08 | Northern Telecom Inc. | Embedded servo track following system and method for writing servo tracks |
WO1992007355A1 (fr) * | 1990-10-12 | 1992-04-30 | Servo Track Writer Corporation | Appareil et procedes d'enregistrement de signaux dans des pistes sur un element memoire |
US5485322A (en) * | 1993-03-08 | 1996-01-16 | International Business Machines Corporation | Method and system for writing a clock track on a storage medium |
US5796541A (en) * | 1995-11-21 | 1998-08-18 | Guzik Technical Enterprises, Inc. | Servo track writing measurement of gapped initial clock track to write full clock track |
US5875064A (en) * | 1996-07-09 | 1999-02-23 | International Business Machines Corporation | Method and system for accurate self-servowriting with normalization in a disk drive |
US6411459B1 (en) | 1999-02-22 | 2002-06-25 | Seagate Technology Llc | Advanced servo writing method for hard disc drives |
US6775083B2 (en) * | 2001-06-26 | 2004-08-10 | Seagate Technology Llc | System for improving accuracy of servo pattern timing reference in a disc drive |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3041585A (en) * | 1953-07-14 | 1962-06-26 | Ncr Co | Dynamic clock recorder |
US2903677A (en) * | 1956-01-13 | 1959-09-08 | Hughes Aircraft Co | Timing track recording apparatus |
US2926341A (en) * | 1956-02-01 | 1960-02-23 | Hughes Aircraft Co | Automatic timing track recording apparatus |
-
1968
- 1968-03-15 US US713547A patent/US3540022A/en not_active Expired - Lifetime
-
1969
- 1969-02-11 GB GB7288/69A patent/GB1215128A/en not_active Expired
- 1969-03-13 DE DE19691912893 patent/DE1912893A1/de active Pending
- 1969-03-14 FR FR6907366A patent/FR2004020A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE1912893A1 (de) | 1969-10-16 |
GB1215128A (en) | 1970-12-09 |
US3540022A (en) | 1970-11-10 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |