GB1398403A - Computers - Google Patents

Computers

Info

Publication number
GB1398403A
GB1398403A GB2213572A GB2213572A GB1398403A GB 1398403 A GB1398403 A GB 1398403A GB 2213572 A GB2213572 A GB 2213572A GB 2213572 A GB2213572 A GB 2213572A GB 1398403 A GB1398403 A GB 1398403A
Authority
GB
United Kingdom
Prior art keywords
base
units
produced
unit
interconnections
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.)
Expired
Application number
GB2213572A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2213572A priority Critical patent/GB1398403A/en
Priority to AU55441/73A priority patent/AU5544173A/en
Priority to FR7317167A priority patent/FR2184106B1/fr
Publication of GB1398403A publication Critical patent/GB1398403A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43M—BUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR
    • B43M5/00—Devices for closing envelopes
    • B43M5/04—Devices for closing envelopes automatic
    • B43M5/042—Devices for closing envelopes automatic for envelopes with only one flap

Landscapes

  • Design And Manufacture Of Integrated Circuits (AREA)

Abstract

1398403 Placing circuit elements STANDARD TELEPHONES & CABLES Ltd 4 May 1973 [11 May 1972] 22135/72 Heading G4A A layout for an electric circuit comprising a number of interconnected units on a base is produced by a computer which treats each unit in turn and for each unit locates it on the base and interconnects it using data representing the size and shape of the base and of the units, the location of the connections to the base and the units, and circuit constraints, the routing of interconnections being determined by simulating the propagation of a wavefront through clear areas, i.e. areas not containing previously placed units or interconnections, on the base. If the computer fails to place a unit or a connection an alarm is given to enable manual rearrangement to allow the process to continue. Details of the final placements are printed out. A layout diagram may be produced on a visual display or a digital plotter. Layouts for single or double sided printed circuits or integrated circuits may be produced.
GB2213572A 1972-05-11 1972-05-11 Computers Expired GB1398403A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2213572A GB1398403A (en) 1972-05-11 1972-05-11 Computers
AU55441/73A AU5544173A (en) 1972-05-11 1973-05-09 Improvements in or relating to computers
FR7317167A FR2184106B1 (en) 1972-05-11 1973-05-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2213572A GB1398403A (en) 1972-05-11 1972-05-11 Computers

Publications (1)

Publication Number Publication Date
GB1398403A true GB1398403A (en) 1975-06-18

Family

ID=10174464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2213572A Expired GB1398403A (en) 1972-05-11 1972-05-11 Computers

Country Status (2)

Country Link
AU (1) AU5544173A (en)
GB (1) GB1398403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131577A (en) * 1982-09-04 1984-06-20 Marconi Co Ltd Circuit route planning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2131577A (en) * 1982-09-04 1984-06-20 Marconi Co Ltd Circuit route planning

Also Published As

Publication number Publication date
AU5544173A (en) 1974-11-14

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee