FR2261594A1 - Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits - Google Patents

Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits

Info

Publication number
FR2261594A1
FR2261594A1 FR7405137A FR7405137A FR2261594A1 FR 2261594 A1 FR2261594 A1 FR 2261594A1 FR 7405137 A FR7405137 A FR 7405137A FR 7405137 A FR7405137 A FR 7405137A FR 2261594 A1 FR2261594 A1 FR 2261594A1
Authority
FR
France
Prior art keywords
data stored
row
transistor
burned out
emitter coupled
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
FR7405137A
Other languages
French (fr)
Other versions
FR2261594B1 (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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC SA
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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR7405137A priority Critical patent/FR2261594A1/en
Priority to DE2505186A priority patent/DE2505186C3/en
Priority to NL7501534A priority patent/NL7501534A/en
Priority to US05/549,065 priority patent/US3976983A/en
Priority to GB5954/75A priority patent/GB1498741A/en
Priority to IT20218/75A priority patent/IT1031700B/en
Priority to CA219,934A priority patent/CA1044370A/en
Priority to AU78197/75A priority patent/AU494303B2/en
Priority to JP1939975A priority patent/JPS50120225A/ja
Publication of FR2261594A1 publication Critical patent/FR2261594A1/en
Application granted granted Critical
Publication of FR2261594B1 publication Critical patent/FR2261594B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/14—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
    • G11C17/16—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM using electrically-fusible links

Landscapes

  • Read Only Memory (AREA)
  • Semiconductor Memories (AREA)

Abstract

The store consists of a number of matrices of npn transistors arranged in rows and columns, with a transistor at each "data point" in a matrix. A particular data point, or transistor is assessed by driving a current down the appropirate row and column conductors, the row conductors being attached to the emitters of a row of transistors, whilst the column conductors are attached to the bases of a column of transistors. The collector of each transistor is connected via a resistance to a suitable current and voltage supply. To write a "one" into a particular location the appropriate row and column are chosen and a current is driven through the collector resistance sufficient to melt and open circuit it.
FR7405137A 1974-02-15 1974-02-15 Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits Granted FR2261594A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7405137A FR2261594A1 (en) 1974-02-15 1974-02-15 Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits
DE2505186A DE2505186C3 (en) 1974-02-15 1975-02-07 Programmable read-only memory
NL7501534A NL7501534A (en) 1974-02-15 1975-02-10 PROGRAMMABLE READ MEMORY.
US05/549,065 US3976983A (en) 1974-02-15 1975-02-11 Bipolar programmable read only memory with fusible links
GB5954/75A GB1498741A (en) 1974-02-15 1975-02-12 Programmable read-only memory
IT20218/75A IT1031700B (en) 1974-02-15 1975-02-12 PROGRAMMABLE READ-ONLY NEMORY
CA219,934A CA1044370A (en) 1974-02-15 1975-02-12 Programmable read only memory
AU78197/75A AU494303B2 (en) 1975-02-13 Programmable read only memory
JP1939975A JPS50120225A (en) 1974-02-15 1975-02-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7405137A FR2261594A1 (en) 1974-02-15 1974-02-15 Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits

Publications (2)

Publication Number Publication Date
FR2261594A1 true FR2261594A1 (en) 1975-09-12
FR2261594B1 FR2261594B1 (en) 1976-11-26

Family

ID=9134952

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7405137A Granted FR2261594A1 (en) 1974-02-15 1974-02-15 Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits

Country Status (1)

Country Link
FR (1) FR2261594A1 (en)

Also Published As

Publication number Publication date
FR2261594B1 (en) 1976-11-26

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Legal Events

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CA Change of address
CD Change of name or company name
ST Notification of lapse