JPS54109730A - Semiconductor read-only memory - Google Patents

Semiconductor read-only memory

Info

Publication number
JPS54109730A
JPS54109730A JP1648978A JP1648978A JPS54109730A JP S54109730 A JPS54109730 A JP S54109730A JP 1648978 A JP1648978 A JP 1648978A JP 1648978 A JP1648978 A JP 1648978A JP S54109730 A JPS54109730 A JP S54109730A
Authority
JP
Japan
Prior art keywords
output
precharge
inverter
detecting
fetqs1
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
JP1648978A
Other languages
Japanese (ja)
Other versions
JPS6146919B2 (en
Inventor
Kenzo Masuda
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1648978A priority Critical patent/JPS54109730A/en
Publication of JPS54109730A publication Critical patent/JPS54109730A/en
Publication of JPS6146919B2 publication Critical patent/JPS6146919B2/ja
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
    • G11C17/08—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements
    • G11C17/10—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM
    • G11C17/12—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards using semiconductor devices, e.g. bipolar elements in which contents are determined during manufacturing by a predetermined arrangement of coupling elements, e.g. mask-programmable ROM using field-effect devices

Landscapes

  • Read Only Memory (AREA)

Abstract

PURPOSE:To increase the operation velocity with limitation of the precharge level for each output point by giving a common driving to plural units of precharge FET's with the output of the NOR gate which uses the inverter output and the inverse signal of the precharge clock as the two input. CONSTITUTION:Detecting FETQS1-QSn are connected in series in the same number as that corresponding to the number of the units of memory matrix groups MR1-MRn, and the output points of these matrix groups are connected to the gates of the detecting FET's. Then inverter TN1, which is controlled by the signal of the connection point between decoder precharging FETQPA and detecting FETQS1, is installed, and at the same time NOR gate circuit NRO is added using the output of the inverter and inverse signal phiB of precharge clock phiB as the two input. And the common driving is given to precharging FETQP1-QPn via the output of circuit NRO. Thus, the precharge level is controlled for each output point to increase the opertion velocity.
JP1648978A 1978-02-17 1978-02-17 Semiconductor read-only memory Granted JPS54109730A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1648978A JPS54109730A (en) 1978-02-17 1978-02-17 Semiconductor read-only memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1648978A JPS54109730A (en) 1978-02-17 1978-02-17 Semiconductor read-only memory

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP60058373A Division JPS61105799A (en) 1985-03-25 1985-03-25 Semiconductor read only memory

Publications (2)

Publication Number Publication Date
JPS54109730A true JPS54109730A (en) 1979-08-28
JPS6146919B2 JPS6146919B2 (en) 1986-10-16

Family

ID=11917694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1648978A Granted JPS54109730A (en) 1978-02-17 1978-02-17 Semiconductor read-only memory

Country Status (1)

Country Link
JP (1) JPS54109730A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637434U (en) * 1979-08-31 1981-04-09
JPS5647996A (en) * 1979-09-20 1981-04-30 Chiyou Lsi Gijutsu Kenkyu Kumiai Semiconductor memory device
JPS59110095A (en) * 1982-12-14 1984-06-25 Sanyo Electric Co Ltd Read-only memory

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637434U (en) * 1979-08-31 1981-04-09
JPS5647996A (en) * 1979-09-20 1981-04-30 Chiyou Lsi Gijutsu Kenkyu Kumiai Semiconductor memory device
JPS59110095A (en) * 1982-12-14 1984-06-25 Sanyo Electric Co Ltd Read-only memory

Also Published As

Publication number Publication date
JPS6146919B2 (en) 1986-10-16

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