RO90404B1 - Module and phase impedance meter - Google Patents

Module and phase impedance meter

Info

Publication number
RO90404B1
RO90404B1 RO116854A RO11685484A RO90404B1 RO 90404 B1 RO90404 B1 RO 90404B1 RO 116854 A RO116854 A RO 116854A RO 11685484 A RO11685484 A RO 11685484A RO 90404 B1 RO90404 B1 RO 90404B1
Authority
RO
Romania
Prior art keywords
amplifier
measuring circuit
oscillator
impedance meter
electronic indicator
Prior art date
Application number
RO116854A
Other languages
Romanian (ro)
Other versions
RO90404A2 (en
Inventor
Simion Pruna
Eugen Popa
Original Assignee
Simion Pruna
Eugen Popa
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 Simion Pruna, Eugen Popa filed Critical Simion Pruna
Priority to RO116854A priority Critical patent/RO90404B1/en
Publication of RO90404A2 publication Critical patent/RO90404A2/en
Publication of RO90404B1 publication Critical patent/RO90404B1/en

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  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Impedantmetru în modul si faza prevazut cu un circuit de masurare pe principiul unei punti semiechilibrate si cu un indicator electronic. Excitarea circuitului de masurare se face cu un generator sinusoidal cu frecventa variabila continuu, alcatuit dintr-un oscilator si un amplificator de putere (13), oscilatorul fiind format dintr-un amplificator (7) si doua repertoare de tensiune (8 si 9), reglarea continua a frecventei facându-se cu un condensator dublu cu aer (10), ambele sectiuni având un punct comun la masa, iar reglarea în trepte a frecventei facându-se cu un set de rezistoare fixe (11 si 12), amplificatorul de putere (13) cu impedanta foarte mica fiind conectat în primarul unui transformator de cuplaj (5) al carui secundar furnizeaza circuitului de masurare o tensiune de excitare reglabila în trepte cu ajutorul unor comutatoare (20 si 21), indicatorul electronic fiind prevazut cu un amplificator diferential (14) cu un zgomot redus pentru stabilitatea functionarii la temperatura, cu un amplificator final (15) si un detector dubla alternanta (16) plasat într-o bucla de reactie negativa globala în curent alternativ a amplificatorului final (15).Impedance meter in the mode and phase provided with a semi-balanced bridge measuring circuit and an electronic indicator. The excitation of the measuring circuit is made with a sinusoidal generator with a continuous variable frequency, consisting of an oscillator and a power amplifier (13), the oscillator being formed by an amplifier (7) and two voltage registers (8 and 9) (10), the two sections having a common point on the table, and the stepwise adjustment of the frequency with a set of fixed resistors (11 and 12), the power amplifier (13) with a very low impedance being connected to the primary of a coupling transformer (5), the second of which supplies the measuring circuit with a step-adjustable excitation voltage by means of switches (20 and 21), the electronic indicator being provided with a differential amplifier (14) with low noise for temperature stability with a final amplifier (15) and an alternating double detector (16) placed in a global negative feedback loop in the current of the final amplifier (15).

RO116854A 1984-12-24 1984-12-24 Module and phase impedance meter RO90404B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO116854A RO90404B1 (en) 1984-12-24 1984-12-24 Module and phase impedance meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO116854A RO90404B1 (en) 1984-12-24 1984-12-24 Module and phase impedance meter

Publications (2)

Publication Number Publication Date
RO90404A2 RO90404A2 (en) 1987-02-27
RO90404B1 true RO90404B1 (en) 1987-02-28

Family

ID=20116142

Family Applications (1)

Application Number Title Priority Date Filing Date
RO116854A RO90404B1 (en) 1984-12-24 1984-12-24 Module and phase impedance meter

Country Status (1)

Country Link
RO (1) RO90404B1 (en)

Also Published As

Publication number Publication date
RO90404A2 (en) 1987-02-27

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