GB1376083A - Circuit arrangement for recording binary signals on magnetisable storage media - Google Patents

Circuit arrangement for recording binary signals on magnetisable storage media

Info

Publication number
GB1376083A
GB1376083A GB442072A GB442072A GB1376083A GB 1376083 A GB1376083 A GB 1376083A GB 442072 A GB442072 A GB 442072A GB 442072 A GB442072 A GB 442072A GB 1376083 A GB1376083 A GB 1376083A
Authority
GB
United Kingdom
Prior art keywords
transistor
coil
voltage
oscillation
transistors
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
GB442072A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB442072A priority Critical patent/GB1376083A/en
Publication of GB1376083A publication Critical patent/GB1376083A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/665—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only
    • H03K17/666—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/665—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only
    • H03K17/666—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor
    • H03K17/667—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to one load terminal only the output circuit comprising more than one controlled bipolar transistor using complementary bipolar transistors

Abstract

1376083 Head circuit for digital recording U HOFMANN 31 Jan 1972 4420/72 Heading G5R [Also in Division H3] A magnetic head circuit for recording binary digits includes a condenser Cp in parallel with the head coil L, R L to constitute an oscillation circuit, and two transistors T 1 , T 2 which are switched by the input voltage e(t) and are connected through respective diodes D 1 , D 2 to the head coil-L, R L such that when one transistor conducts energy is supplied to the oscillation circuit, the other transistor then being non- conducting to prevent continued oscillation. As shown, the transistors T 1 , T 2 may be of opposite conductivity typesand are connected to the same side of the coil L, R L . Input voltage e(t) is applied to the transistor bases through base resistors R B1 , R B2 . When input voltage e(t) changes, one transistor conducts and the oscillation circuit makes one half of an oscillation before coil current i L stabilizes. The transistor collectors are biased by a voltage U B less than or equal to the input pulse voltage e(t). In an alternative embodiment, Fig. 1 (not shown), the transistors (T 1 , R 2 ) are of the same conductivity type, being connected to opposite ends of coil (L), which is centre-tapped to bias voltage (-U B ). Transistor (T 1 ) base is connected to input e(t), while transistor (T 2 ) base is connected to the inverse e(t).
GB442072A 1972-01-31 1972-01-31 Circuit arrangement for recording binary signals on magnetisable storage media Expired GB1376083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB442072A GB1376083A (en) 1972-01-31 1972-01-31 Circuit arrangement for recording binary signals on magnetisable storage media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB442072A GB1376083A (en) 1972-01-31 1972-01-31 Circuit arrangement for recording binary signals on magnetisable storage media

Publications (1)

Publication Number Publication Date
GB1376083A true GB1376083A (en) 1974-12-04

Family

ID=9776854

Family Applications (1)

Application Number Title Priority Date Filing Date
GB442072A Expired GB1376083A (en) 1972-01-31 1972-01-31 Circuit arrangement for recording binary signals on magnetisable storage media

Country Status (1)

Country Link
GB (1) GB1376083A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005980A1 (en) * 1988-11-17 1990-05-31 Deutsche Thomson-Brandt Gmbh Circuit for reversing a magnetic field
EP0556074A2 (en) * 1992-01-16 1993-08-18 Sony Corporation Magnetic head device for magnetooptical disc system and magnetic head driving circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990005980A1 (en) * 1988-11-17 1990-05-31 Deutsche Thomson-Brandt Gmbh Circuit for reversing a magnetic field
EP0556074A2 (en) * 1992-01-16 1993-08-18 Sony Corporation Magnetic head device for magnetooptical disc system and magnetic head driving circuit
EP0556074A3 (en) * 1992-01-16 1993-10-06 Sony Corporation Magnetic head device for magnetooptical disc system and magnetic head driving circuit
US5404342A (en) * 1992-01-16 1995-04-04 Sony Corporation Magnetic head device for magneto-optical disc system and magnetic head driving circuit

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees