GB1145489A - Improvements in/or relating to the magnetic recording of pulses of low recurrence sequency - Google Patents
Improvements in/or relating to the magnetic recording of pulses of low recurrence sequencyInfo
- Publication number
- GB1145489A GB1145489A GB1624966A GB1624966A GB1145489A GB 1145489 A GB1145489 A GB 1145489A GB 1624966 A GB1624966 A GB 1624966A GB 1624966 A GB1624966 A GB 1624966A GB 1145489 A GB1145489 A GB 1145489A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- playback
- pulses
- magnetic recording
- same
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
Abstract
1,145,489. Magnetic recording and playback. BUREAU D'ETUDES SCIENTIFIQUES ET TECHNIQUES. 13 April, 1966 [13 April, 1965], No. 16249/66. Heading G5R. Pulses of information separated by comparatively long pauses are recorded as erased portions interrupting a continuous prerecorded signal of a particular frequency, the record bearing also a reference track comprising a continuous prerecorded signal of the same frequency. On playback, both signals are read out to r comparator to produce a difference signal which is then demodulated. The comparator is used also for testing to ensure that the prerecorded signal is the same on both tracks, controlling lamps or other signals accordingly. The prerecording is carried out at a normal tape speed and the playback at a higher speed on the same apparatus, the pulse recording being effected at a much lower tape speed on a second apparatus in which the incoming pulses control a gated amplifier to which an erasing signal is fed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR12992A FR87700E (en) | 1965-04-13 | 1965-04-13 | Method and device for magnetic recording of electrical pulses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1145489A true GB1145489A (en) | 1969-03-12 |
Family
ID=8576272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1624966A Expired GB1145489A (en) | 1965-04-13 | 1966-04-13 | Improvements in/or relating to the magnetic recording of pulses of low recurrence sequency |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR87700E (en) |
| GB (1) | GB1145489A (en) |
-
1965
- 1965-04-13 FR FR12992A patent/FR87700E/en not_active Expired
-
1966
- 1966-04-13 GB GB1624966A patent/GB1145489A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR87700E (en) | 1966-06-03 |
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