CA941069A - Logarithmic analogue calculating device - Google Patents

Logarithmic analogue calculating device

Info

Publication number
CA941069A
CA941069A CA122,634A CA122634A CA941069A CA 941069 A CA941069 A CA 941069A CA 122634 A CA122634 A CA 122634A CA 941069 A CA941069 A CA 941069A
Authority
CA
Canada
Prior art keywords
calculating device
analogue calculating
logarithmic
logarithmic analogue
calculating
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
CA122,634A
Other languages
English (en)
Other versions
CA122634S (en
Inventor
John M. Morrison
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.)
Ferranti International PLC
Original Assignee
Ferranti 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 Ferranti PLC filed Critical Ferranti PLC
Application granted granted Critical
Publication of CA941069A publication Critical patent/CA941069A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/24—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating logarithmic or exponential functions, e.g. hyperbolic functions

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Amplifiers (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
CA122,634A 1970-09-19 1971-09-13 Logarithmic analogue calculating device Expired CA941069A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4472670 1970-09-19

Publications (1)

Publication Number Publication Date
CA941069A true CA941069A (en) 1974-01-29

Family

ID=10434492

Family Applications (1)

Application Number Title Priority Date Filing Date
CA122,634A Expired CA941069A (en) 1970-09-19 1971-09-13 Logarithmic analogue calculating device

Country Status (5)

Country Link
US (1) US3736415A (enExample)
CA (1) CA941069A (enExample)
DE (1) DE2145885A1 (enExample)
FR (1) FR2106625B1 (enExample)
GB (1) GB1302056A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51115750A (en) * 1975-04-04 1976-10-12 Hitachi Ltd Multiplication device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453423A (en) * 1966-03-16 1969-07-01 Atomic Energy Commission Four quadrant logarithmic multiplier for time-dependent signals
US3540825A (en) * 1968-01-18 1970-11-17 Mcpherson Instr Corp Double beam spectrometer readout system
US3532868A (en) * 1968-07-24 1970-10-06 Electronic Associates Log multiplier with logarithmic function generator connected in feedback loop of operational amplifier
US3584232A (en) * 1969-01-21 1971-06-08 Bell Telephone Labor Inc Precision logarithmic converter

Also Published As

Publication number Publication date
US3736415A (en) 1973-05-29
GB1302056A (enExample) 1973-01-04
FR2106625B1 (enExample) 1976-03-26
DE2145885A1 (de) 1972-03-23
FR2106625A1 (enExample) 1972-05-05

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