GB1308897A - Circuit arrangement for recording binary information on moving magnetisable recording media - Google Patents
Circuit arrangement for recording binary information on moving magnetisable recording mediaInfo
- Publication number
- GB1308897A GB1308897A GB1308897DA GB1308897A GB 1308897 A GB1308897 A GB 1308897A GB 1308897D A GB1308897D A GB 1308897DA GB 1308897 A GB1308897 A GB 1308897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- recording
- differential amplifier
- multivibrator
- moving
- 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
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
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
- G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
- G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
Abstract
1308897 Digital data storage KOMBINAT ZENTRONIK VEB 26 Jan 1971 3226/71 Heading G4C In a system in which digital data pulses are recorded on a moving magnetic recording medium the pulses are supplied to the recording circuitry in a form in which each pulse has only one steep edge, e.g. as in Fig. 2a. In one embodiment the 1 and 0 pulses of this form are fed to inputs E1 E0 respectively, Fig. 1, of a differential amplifier V whose outputs A0, A1, control astable multivibrator M. The Markspace ratio of the multivibrator output signal therefore varies as in Fig. 2b, this signal being applied to the recording head K. The resulting remanence approximates to the waveform to Fig 2a. In a modification, head K is placed in the collector circuit of the multivibrator. The differential amplifier need not be used, and if the pulses, Fig. 2a, are polar the differential amplifier, or the multibrator, may receive the pulses via a single input. (For Figures see next column.)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB322671 | 1971-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1308897A true GB1308897A (en) | 1973-03-07 |
Family
ID=9754354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1308897D Expired GB1308897A (en) | 1971-01-26 | 1971-01-26 | Circuit arrangement for recording binary information on moving magnetisable recording media |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1308897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2128057A (en) * | 1982-09-20 | 1984-04-18 | Jide Olaniyan | Process for data transmission |
-
1971
- 1971-01-26 GB GB1308897D patent/GB1308897A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2128057A (en) * | 1982-09-20 | 1984-04-18 | Jide Olaniyan | Process for data transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed |