GB890580A - Improvements in or relating to reading circuits for signals stored on a magnetic medium - Google Patents

Improvements in or relating to reading circuits for signals stored on a magnetic medium

Info

Publication number
GB890580A
GB890580A GB12102/58A GB1210258A GB890580A GB 890580 A GB890580 A GB 890580A GB 12102/58 A GB12102/58 A GB 12102/58A GB 1210258 A GB1210258 A GB 1210258A GB 890580 A GB890580 A GB 890580A
Authority
GB
United Kingdom
Prior art keywords
read
april
amplifier
relating
storage apparatus
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
GB12102/58A
Inventor
Geoffrey Forshaw
Brian Harford Capper
Stainslaw Wrona
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB12102/58A priority Critical patent/GB890580A/en
Publication of GB890580A publication Critical patent/GB890580A/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
    • 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
    • G11B5/09—Digital recording
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • 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
    • G11B5/00804—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic sheets
    • G11B5/00808—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic sheets magnetic cards
    • 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
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • 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
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • G11B5/00847—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks
    • G11B5/0086—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks using cyclically driven heads providing segmented tracks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

890,580. Magnetic data-storage apparatus. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. April 3, 1959 [April 16, 1958], No. 12102/58. Class 106 (1). A circuit providing two complementary output signals at SL, SL in response to signals from the read-head RH of magnetic drum, disc or tape data storage apparatus using the phasemodulation method of recording described in Specification 707,634 in which the polarity of the voltage induced in the read head at the instant of a strobe pulse is indicative of the binary digit being read, comprises an amplifier (transistor stages TX1-3 in cascade), a phasesplitter TX4, and gates TX5, 6 opened by strobe pulses from SS to enable the flip-flop TX8, 9 to be appropriately switched. The amplifier has negative feedback provided by undecoupled resistor R6, and D1 compensates for the non- linear input impedance of TX3.
GB12102/58A 1958-04-16 1958-04-16 Improvements in or relating to reading circuits for signals stored on a magnetic medium Expired GB890580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12102/58A GB890580A (en) 1958-04-16 1958-04-16 Improvements in or relating to reading circuits for signals stored on a magnetic medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12102/58A GB890580A (en) 1958-04-16 1958-04-16 Improvements in or relating to reading circuits for signals stored on a magnetic medium

Publications (1)

Publication Number Publication Date
GB890580A true GB890580A (en) 1962-03-07

Family

ID=9998421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12102/58A Expired GB890580A (en) 1958-04-16 1958-04-16 Improvements in or relating to reading circuits for signals stored on a magnetic medium

Country Status (1)

Country Link
GB (1) GB890580A (en)

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