JPS55129997A - Decoder - Google Patents

Decoder

Info

Publication number
JPS55129997A
JPS55129997A JP774880A JP774880A JPS55129997A JP S55129997 A JPS55129997 A JP S55129997A JP 774880 A JP774880 A JP 774880A JP 774880 A JP774880 A JP 774880A JP S55129997 A JPS55129997 A JP S55129997A
Authority
JP
Japan
Prior art keywords
standard form
channel
expression
pattern
product standard
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
JP774880A
Other languages
Japanese (ja)
Other versions
JPS5713942B2 (en
Inventor
Yasoji Suzuki
Kenji Manabe
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP774880A priority Critical patent/JPS55129997A/en
Publication of JPS55129997A publication Critical patent/JPS55129997A/en
Publication of JPS5713942B2 publication Critical patent/JPS5713942B2/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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10B—ELECTRONIC MEMORY DEVICES
    • H10B20/00—Read-only memory [ROM] devices

Landscapes

  • Static Random-Access Memory (AREA)
  • Read Only Memory (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To make it possible to reduce the occupation area of a pattern of a ROM, etc., using C-MOS, by connecting in parallel circuits where p-channel and N-channel IGFETs are connected in series. CONSTITUTION:In respect to the conversion ROM to a 7-segment display unit consisting of a binary coded decimal code, for example, segment a is selected if outputs 1, 2, 4, and 8 of the binary coded decimal code are indicated by the logical expression dependent upon the sum standard form expressed by expression-1, however, the N-channel region is substituted by pattern arrangement using expression-2 of the product standard form. Therefore, it is sufficient if an element is provided under each signal line 11, and it is sufficient if signal lines 11 have such a small interval as to prevent collision of wirings. Thus, the logical expression is modified to the sum standard form and the product standard form, and N-channel IGFETs and P-channel IGFETs are arranged according to the product standard form in the negative-logic system and the positive-logic system respectively, so that the area of the pattern can be reduced.
JP774880A 1980-01-28 1980-01-28 Decoder Granted JPS55129997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP774880A JPS55129997A (en) 1980-01-28 1980-01-28 Decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP774880A JPS55129997A (en) 1980-01-28 1980-01-28 Decoder

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP8615973A Division JPS5620734B2 (en) 1973-07-13 1973-07-31

Publications (2)

Publication Number Publication Date
JPS55129997A true JPS55129997A (en) 1980-10-08
JPS5713942B2 JPS5713942B2 (en) 1982-03-20

Family

ID=11674313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP774880A Granted JPS55129997A (en) 1980-01-28 1980-01-28 Decoder

Country Status (1)

Country Link
JP (1) JPS55129997A (en)

Also Published As

Publication number Publication date
JPS5713942B2 (en) 1982-03-20

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