FR2319230A1 - Protection circuit employing ferrite cores - with emitter-follower connected transistor in output winding of lattice end element - Google Patents

Protection circuit employing ferrite cores - with emitter-follower connected transistor in output winding of lattice end element

Info

Publication number
FR2319230A1
FR2319230A1 FR7622669A FR7622669A FR2319230A1 FR 2319230 A1 FR2319230 A1 FR 2319230A1 FR 7622669 A FR7622669 A FR 7622669A FR 7622669 A FR7622669 A FR 7622669A FR 2319230 A1 FR2319230 A1 FR 2319230A1
Authority
FR
France
Prior art keywords
lattice
output winding
emitter
protection circuit
end element
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.)
Granted
Application number
FR7622669A
Other languages
French (fr)
Other versions
FR2319230B1 (en
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 claimed from GB3106375A external-priority patent/GB1518973A/en
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Publication of FR2319230A1 publication Critical patent/FR2319230A1/en
Application granted granted Critical
Publication of FR2319230B1 publication Critical patent/FR2319230B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/06—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using single-aperture storage elements, e.g. ring core; using multi-aperture plates in which each individual aperture forms a storage element

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Inverter Devices (AREA)
  • Soft Magnetic Materials (AREA)
  • Electronic Switches (AREA)
  • Logic Circuits (AREA)

Abstract

The monitoring or protection circuits employing ferrite lattice cores (L1, L2) are connected in cascade error signals can be induced in the external output circuit wiring which can cause incorrect resetting of the flux in the second lattice (L2) without a corresponding change of state in the first (L1). The problem can be largely overcome by connecting the output winding (WO) of the first lattice (L1) to the base of the planar transistor (T2) connected as an emitter follower, and feeding the reset winding (WR) of the lattice (L2) connected in cascade. Using a planar transistor in this configuration causes its output impedance to limit the rise and fall times of the magneto-motive force produced by the output winding and thereby give a large measure of immunity against fast-rising spikes.
FR7622669A 1975-07-24 1976-07-23 Protection circuit employing ferrite cores - with emitter-follower connected transistor in output winding of lattice end element Granted FR2319230A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3106375A GB1518973A (en) 1975-07-24 1975-07-24 Electric circuits incorporating laddics
GB4944575 1975-12-02

Publications (2)

Publication Number Publication Date
FR2319230A1 true FR2319230A1 (en) 1977-02-18
FR2319230B1 FR2319230B1 (en) 1982-10-22

Family

ID=26260722

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7622669A Granted FR2319230A1 (en) 1975-07-24 1976-07-23 Protection circuit employing ferrite cores - with emitter-follower connected transistor in output winding of lattice end element

Country Status (3)

Country Link
JP (1) JPS5217735A (en)
DE (1) DE2633254A1 (en)
FR (1) FR2319230A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125744A (en) * 1964-03-17 Stage
GB1031199A (en) * 1963-06-05 1966-06-02 Mullard Ltd Circuit arrangement coupling between multi-aperture magnetic cores

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125744A (en) * 1964-03-17 Stage
GB1031199A (en) * 1963-06-05 1966-06-02 Mullard Ltd Circuit arrangement coupling between multi-aperture magnetic cores

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EXBK/58 *
EXBK/62 *

Also Published As

Publication number Publication date
FR2319230B1 (en) 1982-10-22
JPS5217735A (en) 1977-02-09
DE2633254A1 (en) 1977-02-17

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Legal Events

Date Code Title Description
ST Notification of lapse