GB1493023A - Circuits for the comparison of two electrical signals - Google Patents

Circuits for the comparison of two electrical signals

Info

Publication number
GB1493023A
GB1493023A GB1141275A GB1141275A GB1493023A GB 1493023 A GB1493023 A GB 1493023A GB 1141275 A GB1141275 A GB 1141275A GB 1141275 A GB1141275 A GB 1141275A GB 1493023 A GB1493023 A GB 1493023A
Authority
GB
United Kingdom
Prior art keywords
voltage
difference indicator
adjusted until
amplifier
unknown
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
GB1141275A
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.)
Association des Ouvriers en Instruments de Precision
Original Assignee
Association des Ouvriers en Instruments de Precision
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 Association des Ouvriers en Instruments de Precision filed Critical Association des Ouvriers en Instruments de Precision
Publication of GB1493023A publication Critical patent/GB1493023A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

1493023 Voltage measuring ASSOCIATION DES OUVRIERS EN INSTRUMENTS DE PRECISION 19 March 1975 [20 March 1974] 11412/75 Heading G1U [Also in Division H4] A voltage difference indicator Fig. 1, comprises two amplifiers A, B having identical gains set so as to maintain the output signal of amplifier A constant. Three realisations of such a circuit are described, Figs. 2, 3 and 4 (not shown) see Division H4. Such an arrangement can be used to measure an unknown voltage in two ways: either a reference voltage 3', Fig. 5, can be applied via a calibrated attenuator Ate to one input of the voltage difference indicator 1, and the attenuator adjusted until balance is achieved with an unknown voltage applied to the other input of the difference indicator 1; or a reference voltage 3, Fig. 6, can be applied direct to the difference indicator, the unknown voltage being applied via a calibrated variable gain amplifier C whose gain is adjusted until balance is attained. The voltage difference indicator can also be used to measure the attenuation of a network DP, Fig. 7, by applying a reference voltage 7 direct to the difference indicator and also via the network DP under test, the gain of an amplifier AmE in the latter path being adjusted until balance is attained.
GB1141275A 1974-03-20 1975-03-19 Circuits for the comparison of two electrical signals Expired GB1493023A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7409448A FR2265100B1 (en) 1974-03-20 1974-03-20

Publications (1)

Publication Number Publication Date
GB1493023A true GB1493023A (en) 1977-11-23

Family

ID=9136591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1141275A Expired GB1493023A (en) 1974-03-20 1975-03-19 Circuits for the comparison of two electrical signals

Country Status (5)

Country Link
BE (1) BE826447A (en)
ES (1) ES435721A1 (en)
FR (1) FR2265100B1 (en)
GB (1) GB1493023A (en)
IT (1) IT1030387B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028558A (en) * 1976-06-21 1977-06-07 International Business Machines Corporation High accuracy MOS comparator

Also Published As

Publication number Publication date
FR2265100B1 (en) 1978-09-29
IT1030387B (en) 1979-03-30
FR2265100A1 (en) 1975-10-17
ES435721A1 (en) 1976-12-16
BE826447A (en) 1975-09-08

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Legal Events

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