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JPS5525840A - Decoder circuit - Google Patents

Decoder circuit

Info

Publication number
JPS5525840A
JPS5525840A JP9792378A JP9792378A JPS5525840A JP S5525840 A JPS5525840 A JP S5525840A JP 9792378 A JP9792378 A JP 9792378A JP 9792378 A JP9792378 A JP 9792378A JP S5525840 A JPS5525840 A JP S5525840A
Authority
JP
Japan
Prior art keywords
units
circuit
circuits
bits
addresses
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.)
Pending
Application number
JP9792378A
Other languages
Japanese (ja)
Inventor
Hiroshi Hirao
Yasuo Orikabe
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9792378A priority Critical patent/JPS5525840A/en
Publication of JPS5525840A publication Critical patent/JPS5525840A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C8/00—Arrangements for selecting an address in a digital store
    • G11C8/12—Group selection circuits, e.g. for memory block selection, chip selection, array selection

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Static Random-Access Memory (AREA)

Abstract

PURPOSE:To decrease considerably the number of the memory elements with a simple circuit constitution. CONSTITUTION:The 1st circuits E1-E4 decode the optional k(2) bits of the address signal composed of n(8) bits, and 2nd circuit E5 of 2<n-k>(64) sets decode the rest n-k(6) bits of the address signal. In addition, 3rd circuit E7 is provided which receives the output of circuit E5 and comprises four units of circuit elements using output PW1-PW4 of four units (2<k> units) of circuits E1-E4 as the power source each. Now 2<k>(4) units are selected among addresses 2<n>(256) through circuits E5, E6 and E9, and 2<k>(4) units are selected through circuits E1-E4. As a result, all addresses of 2<n>(256) units can be selected, thus decreasing a considerable amount of the element number as well as reducing the occupied area.
JP9792378A 1978-08-11 1978-08-11 Decoder circuit Pending JPS5525840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9792378A JPS5525840A (en) 1978-08-11 1978-08-11 Decoder circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9792378A JPS5525840A (en) 1978-08-11 1978-08-11 Decoder circuit

Publications (1)

Publication Number Publication Date
JPS5525840A true JPS5525840A (en) 1980-02-23

Family

ID=14205201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9792378A Pending JPS5525840A (en) 1978-08-11 1978-08-11 Decoder circuit

Country Status (1)

Country Link
JP (1) JPS5525840A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104553A (en) * 1982-11-01 1984-06-16 ベツクマン・インストルメンツ・インコ−ポレ−テツド Method and reagent for determining peroxide and its precursor
JPS6059588A (en) * 1983-09-12 1985-04-05 Hitachi Ltd Semiconductor storage device
JPS61237294A (en) * 1985-04-12 1986-10-22 Hitachi Ltd Dynamic type ram

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59104553A (en) * 1982-11-01 1984-06-16 ベツクマン・インストルメンツ・インコ−ポレ−テツド Method and reagent for determining peroxide and its precursor
JPS6059588A (en) * 1983-09-12 1985-04-05 Hitachi Ltd Semiconductor storage device
JPH0568040B2 (en) * 1983-09-12 1993-09-28 Hitachi Ltd
JPS61237294A (en) * 1985-04-12 1986-10-22 Hitachi Ltd Dynamic type ram

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