GB810665A - Improvements in or relating to apparatus for the measurement of resistors - Google Patents

Improvements in or relating to apparatus for the measurement of resistors

Info

Publication number
GB810665A
GB810665A GB837556A GB837556A GB810665A GB 810665 A GB810665 A GB 810665A GB 837556 A GB837556 A GB 837556A GB 837556 A GB837556 A GB 837556A GB 810665 A GB810665 A GB 810665A
Authority
GB
United Kingdom
Prior art keywords
resistance
amplifier
voltage
series
gain
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
GB837556A
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.)
Welwyn Electrcal Laboratories Ltd
Original Assignee
Welwyn Electrcal Laboratories 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 Welwyn Electrcal Laboratories Ltd filed Critical Welwyn Electrcal Laboratories Ltd
Priority to GB837556A priority Critical patent/GB810665A/en
Publication of GB810665A publication Critical patent/GB810665A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

810,665. Resistance bridge measurements. WELWYN ELECTRICAL LABORATORIES Ltd., and FRANCE, G. March 16, 1956, No. 8375/56. Class 37. In Fig. 1 a high-value unknown resistance Rx is connected in series with a standard resistance Rs across a constant voltage source E1 and the voltage across Rs is connected to the input of a high-stability feedback D.C. amplifier 1 of gain A, high input impedance and low output impedance, and a calibrated variable resistance R3 is connected in series with a resistance R2 across a second constant-voltage source E2 ; the voltage across R2 and the amplifier output being connected to opposite poles of a galvanometer 2. Then The amplifier may be of the vibrating capacitance, A.C. amplifying, and rectifying type while the standard voltages may be obtained from a single voltage divider. In a modification (Fig. 2, not shown) resistance R3 is fixed and the amplifier gain is known and variable.
GB837556A 1956-03-16 1956-03-16 Improvements in or relating to apparatus for the measurement of resistors Expired GB810665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB837556A GB810665A (en) 1956-03-16 1956-03-16 Improvements in or relating to apparatus for the measurement of resistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB837556A GB810665A (en) 1956-03-16 1956-03-16 Improvements in or relating to apparatus for the measurement of resistors

Publications (1)

Publication Number Publication Date
GB810665A true GB810665A (en) 1959-03-18

Family

ID=9851330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB837556A Expired GB810665A (en) 1956-03-16 1956-03-16 Improvements in or relating to apparatus for the measurement of resistors

Country Status (1)

Country Link
GB (1) GB810665A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204179A (en) * 1959-11-25 1965-08-31 Western Electric Co Test circuit for determining impedance and related characteristics of an electrical element including transistor means operated with zero collector-to-base voltage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204179A (en) * 1959-11-25 1965-08-31 Western Electric Co Test circuit for determining impedance and related characteristics of an electrical element including transistor means operated with zero collector-to-base voltage

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