FR2289999A2 - 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
FR2289999A2
FR2289999A2 FR7436453A FR7436453A FR2289999A2 FR 2289999 A2 FR2289999 A2 FR 2289999A2 FR 7436453 A FR7436453 A FR 7436453A FR 7436453 A FR7436453 A FR 7436453A FR 2289999 A2 FR2289999 A2 FR 2289999A2
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
FR7436453A
Other languages
French (fr)
Other versions
FR2289999B2 (en
Inventor
Michel Moussie
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 FR7436453A priority Critical patent/FR2289999A2/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 CA219,934A priority patent/CA1044370A/en
Priority to IT20218/75A priority patent/IT1031700B/en
Priority to AU78197/75A priority patent/AU494303B2/en
Priority to JP1939975A priority patent/JPS50120225A/ja
Publication of FR2289999A2 publication Critical patent/FR2289999A2/en
Application granted granted Critical
Publication of FR2289999B2 publication Critical patent/FR2289999B2/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

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.
FR7436453A 1974-02-15 1974-10-31 Programmable fixed store using emitter coupled logic - has data stored in form of burned out resistors in transistor collector circuits Granted FR2289999A2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7436453A FR2289999A2 (en) 1974-10-31 1974-10-31 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
CA219,934A CA1044370A (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
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
FR7436453A FR2289999A2 (en) 1974-10-31 1974-10-31 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
FR2289999A2 true FR2289999A2 (en) 1976-05-28
FR2289999B2 FR2289999B2 (en) 1983-09-23

Family

ID=9144600

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7436453A Granted FR2289999A2 (en) 1974-02-15 1974-10-31 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) FR2289999A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454672A1 (en) * 1979-04-19 1980-11-14 Nat Semiconductor Corp FIXED MEMORY PROGRAMMABLE BY LASER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454672A1 (en) * 1979-04-19 1980-11-14 Nat Semiconductor Corp FIXED MEMORY PROGRAMMABLE BY LASER

Also Published As

Publication number Publication date
FR2289999B2 (en) 1983-09-23

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