GB979646A - Improvements in or relating to the comparison of magnitudes of numbers - Google Patents

Improvements in or relating to the comparison of magnitudes of numbers

Info

Publication number
GB979646A
GB979646A GB2398461A GB2398461A GB979646A GB 979646 A GB979646 A GB 979646A GB 2398461 A GB2398461 A GB 2398461A GB 2398461 A GB2398461 A GB 2398461A GB 979646 A GB979646 A GB 979646A
Authority
GB
United Kingdom
Prior art keywords
output
gate
digits
circuit
inputs
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
GB2398461A
Inventor
Donald Sidney Penney
Leslie James Kennard
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.)
Microcell Ltd
Original Assignee
Microcell 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 Microcell Ltd filed Critical Microcell Ltd
Priority to GB2398461A priority Critical patent/GB979646A/en
Priority to DEM53393A priority patent/DE1195974B/en
Priority to SE734662A priority patent/SE307859B/xx
Publication of GB979646A publication Critical patent/GB979646A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/02—Comparing digital values
    • G06F7/026—Magnitude comparison, i.e. determining the relative order of operands based on their numerical value, e.g. window comparator

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Logic Circuits (AREA)
  • Complex Calculations (AREA)

Abstract

979, 646. Comparing digital data. MICROCELL Ltd. June 29, 1962 [July 3, 1961], No. 23984/61. Heading G4M. In a circuit for comparing two binary numbers registered in registers 22, 23, the digits of the second number are inverted at 24, and the inverted digits applied, together with the true digits of the first number, to majority gate circuits 19, 20, 21 &c., the circuit 19 being for the least significant digits. The gate circuits 19, 20, 21 &c., each have three inputs and one output, the output of each being connected as one of the inputs to the next gate circuit, and are such that each produces an output only when signals are applied to at least two of its inputs. If there is an output from the final gate of the series then the number in the register 22 is greater than that in the register 23. If there is no such output the converse inequality holds, or else the numbers are equal. The application of a signal to the third input 25 of the first gate circuit 19 will distinguish these two cases by producing an output from the final gate only in the case of equality. The gate circuits 19, 20 &c. comprise transistors (Fig. 1, not shown).
GB2398461A 1961-07-03 1961-07-03 Improvements in or relating to the comparison of magnitudes of numbers Expired GB979646A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2398461A GB979646A (en) 1961-07-03 1961-07-03 Improvements in or relating to the comparison of magnitudes of numbers
DEM53393A DE1195974B (en) 1961-07-03 1962-06-30 Arrangement for comparing two numbers in binary digit form
SE734662A SE307859B (en) 1961-07-03 1962-07-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2398461A GB979646A (en) 1961-07-03 1961-07-03 Improvements in or relating to the comparison of magnitudes of numbers

Publications (1)

Publication Number Publication Date
GB979646A true GB979646A (en) 1965-01-06

Family

ID=10204546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2398461A Expired GB979646A (en) 1961-07-03 1961-07-03 Improvements in or relating to the comparison of magnitudes of numbers

Country Status (3)

Country Link
DE (1) DE1195974B (en)
GB (1) GB979646A (en)
SE (1) SE307859B (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885655A (en) * 1954-04-09 1959-05-05 Underwood Corp Binary relative magnitude comparator
US2907877A (en) * 1954-05-18 1959-10-06 Hughes Aircraft Co Algebraic magnitude comparators

Also Published As

Publication number Publication date
DE1195974B (en) 1965-07-01
SE307859B (en) 1969-01-20

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