GB838209A - Improvements in or relating to magnetic reproducing apparatus - Google Patents

Improvements in or relating to magnetic reproducing apparatus

Info

Publication number
GB838209A
GB838209A GB4185/59A GB418559A GB838209A GB 838209 A GB838209 A GB 838209A GB 4185/59 A GB4185/59 A GB 4185/59A GB 418559 A GB418559 A GB 418559A GB 838209 A GB838209 A GB 838209A
Authority
GB
United Kingdom
Prior art keywords
reproducing apparatus
signal
relating
magnetic reproducing
parent specification
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
Application number
GB4185/59A
Inventor
Rolf Edmund Spencer
Roger Voles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to GB12405/54A priority Critical patent/GB762699A/en
Application filed by EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB4185/59A priority patent/GB838209A/en
Publication of GB838209A publication Critical patent/GB838209A/en
Expired legal-status Critical Current

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
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • G11B20/225—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions for reducing wow or flutter

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

838,209. Magnetic recording and reproducing apparatus. ELECTRIC & MUSICAL INDUS. TRIES Ltd. Feb. 6, 1959, No. 4185/59. Addition to 762,699. Drawings to Specification. Class 40 (2). Phase-difference modulated magnetic recorder as in the parent Specification, except that a signal, free of phase error, is produced from the duplicated tracks, especially by means of a combining type reproducing head and this signal is used in conjunction with that derived from the unduplicated track to produce the output. In a further embodiment, symmetric antiphase modulation of the two carriers is used in place of the single-sided method described in the parent Specification.
GB4185/59A 1954-04-29 1959-02-06 Improvements in or relating to magnetic reproducing apparatus Expired GB838209A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB12405/54A GB762699A (en) 1954-04-29 1954-04-29 Improvements in or relating to magnetic reproducing apparatus
GB4185/59A GB838209A (en) 1954-04-29 1959-02-06 Improvements in or relating to magnetic reproducing apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB12405/54A GB762699A (en) 1954-04-29 1954-04-29 Improvements in or relating to magnetic reproducing apparatus
GB4185/59A GB838209A (en) 1954-04-29 1959-02-06 Improvements in or relating to magnetic reproducing apparatus

Publications (1)

Publication Number Publication Date
GB838209A true GB838209A (en) 1960-06-22

Family

ID=62529338

Family Applications (2)

Application Number Title Priority Date Filing Date
GB12405/54A Expired GB762699A (en) 1954-04-29 1954-04-29 Improvements in or relating to magnetic reproducing apparatus
GB4185/59A Expired GB838209A (en) 1954-04-29 1959-02-06 Improvements in or relating to magnetic reproducing apparatus

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB12405/54A Expired GB762699A (en) 1954-04-29 1954-04-29 Improvements in or relating to magnetic reproducing apparatus

Country Status (1)

Country Link
GB (2) GB762699A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204228A (en) * 1955-11-16 1965-08-31 Sperry Rand Corp Signal synchronizer
US3051797A (en) * 1959-03-09 1962-08-28 Minnesota Mining & Mfg Transducing system
US3174090A (en) * 1959-04-27 1965-03-16 Rca Corp Phase responsive motor speed control system
US3187092A (en) * 1959-04-27 1965-06-01 Rca Corp Speed control system using parallel control loops
US3263031A (en) * 1962-05-29 1966-07-26 Sperry Rand Corp High-low frequency homing
JPS53149308A (en) * 1977-06-01 1978-12-26 Matsushita Electric Ind Co Ltd Recorder-reproducer of digital signals

Also Published As

Publication number Publication date
GB762699A (en) 1956-12-05

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