GB1209665A - Arrangement for attenuation of the overshoot effect of current pulses supplied to interact with core memories - Google Patents

Arrangement for attenuation of the overshoot effect of current pulses supplied to interact with core memories

Info

Publication number
GB1209665A
GB1209665A GB174368A GB174368A GB1209665A GB 1209665 A GB1209665 A GB 1209665A GB 174368 A GB174368 A GB 174368A GB 174368 A GB174368 A GB 174368A GB 1209665 A GB1209665 A GB 1209665A
Authority
GB
United Kingdom
Prior art keywords
drive wire
current pulses
drive
voltages
arrangement
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
GB174368A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1209665A publication Critical patent/GB1209665A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K3/00Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/45Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of non-linear magnetic or dielectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

1,209,665. Circuits employing bi-stable magnetic elements. TELEFONAKTIEBOLAGET L. M. ERICSSON. 11 Jan., 1968 [12 Jan., 1967], No. 1743/68. Heading H3B. In order to attenuate overshoot effects of drive current pulses in a matrix drive wire the drive current pulses are fed to one end of the matrix drive wire via the primary winding of the transformer, the secondary winding of which is connected between the other end of the drive wire and earth. In the arrangement of Fig. 4 pulse source I emits a voltage pulse U which appears across the primary and secondary windings of transformer T and since the capacitance to ground is uniformly distributed along the drive wire and the primary and secondary windings have equal numbers of turns a voltage distribution symmetrical to ground will be obtained. The overshoots of the drive current pulses due to the distributed inductance and capacitance to ground of the drive wire will be largest at the point A and since distributed capacitances and inductances of only half the drive wire are contributing to the production of overshoots the latter are reduced in magnitude. By connecting the drive wire as shown reverse voltages in the secondary winding induced at the end of the drive pulse are eliminated which voltages would otherwise produce a disturb pulse in the drive wire. Fig. 5 shows how a plurality of arrangements of Fig. 4 may be connected in series a disadvantage being that the voltages in the transformers T1, T2, T3 are successively decreasing. This may be overcome by using the arrangement of Fig. 6 in which transformer T is used in the same way as in Fig. 4 and toroidal cores Q1, Q2, Q3, Q4 are connected between sections of the matrix drive wire. Each section has one fifth of the voltage appearing across it and the voltages across the toroidal cores acting as single winding transformers are equal.
GB174368A 1967-01-12 1968-01-11 Arrangement for attenuation of the overshoot effect of current pulses supplied to interact with core memories Expired GB1209665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE44967A SE314101B (en) 1967-01-12 1967-01-12

Publications (1)

Publication Number Publication Date
GB1209665A true GB1209665A (en) 1970-10-21

Family

ID=20256596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB174368A Expired GB1209665A (en) 1967-01-12 1968-01-11 Arrangement for attenuation of the overshoot effect of current pulses supplied to interact with core memories

Country Status (9)

Country Link
BE (1) BE709218A (en)
DE (1) DE1549108B2 (en)
DK (1) DK112882B (en)
FI (1) FI42840C (en)
FR (1) FR1553193A (en)
GB (1) GB1209665A (en)
NL (1) NL6800506A (en)
NO (1) NO120039B (en)
SE (1) SE314101B (en)

Also Published As

Publication number Publication date
FR1553193A (en) 1969-01-10
DE1549108A1 (en) 1970-10-22
NL6800506A (en) 1968-07-15
SE314101B (en) 1969-09-01
BE709218A (en) 1968-05-16
NO120039B (en) 1970-08-17
FI42840C (en) 1970-11-10
DK112882B (en) 1969-01-27
DE1549108B2 (en) 1971-12-16
FI42840B (en) 1970-08-03

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Legal Events

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