DE642479C - Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits - Google Patents

Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits

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Publication number
DE642479C
DE642479C DEB162203D DEB0162203D DE642479C DE 642479 C DE642479 C DE 642479C DE B162203 D DEB162203 D DE B162203D DE B0162203 D DEB0162203 D DE B0162203D DE 642479 C DE642479 C DE 642479C
Authority
DE
Germany
Prior art keywords
tube
voltage
circuits
bridge
circuit arrangement
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
DEB162203D
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German (de)
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.)
GUSTAV BARTH DR ING
Original Assignee
GUSTAV BARTH DR ING
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 GUSTAV BARTH DR ING filed Critical GUSTAV BARTH DR ING
Priority to DEB162203D priority Critical patent/DE642479C/en
Application granted granted Critical
Publication of DE642479C publication Critical patent/DE642479C/en
Expired legal-status Critical Current

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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
    • G01R19/0023—Measuring currents or voltages from sources with high internal resistance by means of measuring circuits with high input impedance, e.g. OP-amplifiers
    • 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
    • G01R17/10—AC or DC measuring bridges
    • G01R17/105—AC or DC measuring bridges for measuring impedance or resistance

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Description

In' dem Hauptpatent ist eine Schaltungsanordnung· beschrieben, durch welche in einer Brüchenschaltung mit spannungsabhängigen Widerständen ein Einfluß von Spannungs-Schwankungen der Betriebsstromquellen auf das Instrument in der Brücke der Schaltung beseitigt wird. Dies geschieht nach dem Hauptpatent dadurch, daß in einen der Brückenzweige 'eine zusätzliche Spannung von solcher Größe eingefügt ist, daß eine Änderung" der Speisespannung lohne Einfluß auf die Einstellung des in' der Brücke liegenden Instrumentes ist.In the main patent is a circuit arrangement described by which in a bridge circuit with voltage-dependent Resistors have an influence of voltage fluctuations in the operating power sources the instrument in the bridge of the circuit is eliminated. This happens after Main patent in that in one of the bridge branches' an additional tension of Such a size is inserted that a change "in the supply voltage would have no effect is the setting of the instrument lying in the bridge.

Die vorliegende Erfindung betrifft eine weitere Ausgestaltung des -im Hauptpatent zugrunde gelegten Gedankens, und zwar beseitigt sie den Einfluß der Spannungsschwankungeti der Betriebsstromquellen- .der Brük-. kenschaltung auf den Indikator in der Brücke einer Brückenschaltung, welche mindestens zwei Elektronenstrecken einer Elektronenröhre als spannungs abhängige Widerstände enthält, indem parallel zu einer Elektronen-Strecke, und zwar· zu der- Strecke, die die größere Spannüngsäbhängigkeit zeigt, oder parallel zu leiner Kombination dieser Elektronenstrecke mit Ohmschen Widerständen ein Ohmscher Widerstand gelegt wird.The present invention relates to a further embodiment of the main patent underlying thought, namely it eliminates the influence of the voltage fluctuations the operating power source- .the bridge-. switching to the indicator in the bridge a bridge circuit, which has at least two electron paths of an electron tube contains as voltage-dependent resistances by parallel to an electron path, namely · to the route that shows the greater voltage dependency, or parallel to a combination of this electron path with ohmic resistances an ohmic resistor is placed.

In der Zeichnung ist als Ausführungsbeispiel die Anwendung der-Erfindung auf eine an sich bekannte Röhrengalvanometerschaltung mit Raumladegitterröhre dargestellt. Bei dieser bekannten Schaltung liegt das Brückeninstrument zwischen einem Punkt des Änodenstromkreises und einem Punkt des Raumladegitterstromkreises so, daß der Spannungsabfall des Anodenstromes im Anodenwiderstand gleich ist dem Spannungsabfall des Raurnladegitterstromes in einem Teil des Raumladegitterwiderstandes. Die Abbildung zeigt die Schaltung des stabilisierten Röhrengalvanometers. Die Schaltung enthält in den Brückenzweigen zwei spannungsabhängige Widerstände. Die Brückenwiderstände sind i. Röhrenwiderstand Anode-Kathode (spannungsabhängiger Widerstand), 2. Röhrenwiderstand Hilfsgitter-Kathode plus Gifterwiderstand Rg1 (spannungsabMngiger Widerstand), 3. · Anodenwiderstand Ra, 4. Gitterwiderstand Rg2. In the drawing, the application of the invention to a known tube galvanometer circuit with a space charge grid tube is shown as an exemplary embodiment. In this known circuit, the bridge instrument is located between a point of the anode circuit and a point of the space charge grid circuit so that the voltage drop of the anode current in the anode resistor is equal to the voltage drop of the space charge grid current in part of the space charge grid resistor. The illustration shows the circuit of the stabilized tubular galvanometer. The circuit contains two voltage-dependent resistors in the bridge branches. The bridge resistances are i. Tube resistance anode-cathode (voltage-dependent resistance), 2nd tube resistance auxiliary grid cathode plus pointer resistance Rg 1 (voltage-dependent resistance), 3rd anode resistance Ra, 4th grid resistance Rg 2 .

Die Widerstände rg und r dienen zur Herstellung· der erforderlichen Heiz- und Steuergitterspannungen, X bedeutet die zu messende Spannung, U ist die Betriebsspannung der Schaltung.The resistors r g and r are used to produce the required heating and control grid voltages, X means the voltage to be measured, U is the operating voltage of the circuit.

Um den Einfluß von Schwankungen derTo avoid the influence of fluctuations in the

Spannung U auf den Indikator in der Brücke der Schaltung zu vermeiden, wird erfindungsgemäß parallel zu der Widerstandsbombination Anode-Kathode plus rg der Stabilisier? rungswiderstand R gelegt und gleichzeitig .0,-) oder Rg2 so geändert, daß das Brückeninstr-U.-·■''■ ment seine Ruhelage beibehält. Durch diey-i Wahl der Größe dieses Widerstandes R wird die Spannungsabhängigkeit des Widerstandes ίο Anode-Kathode so lange vermindert, bis der Brückenindikator durch Schwankungen der Spannung der Betriebsstromquelle U nicht mehr beeinflußt wird.To avoid voltage U on the indicator in the bridge of the circuit, according to the invention, parallel to the resistor combination anode-cathode plus r g of the stabilizer? ration resistance R placed and at the same time .0, -) or Rg 2 changed so that the bridge instrument U.- · ■ '' ■ ment maintains its rest position. By choosing the size of this resistor R , the voltage dependency of the resistor ίο anode-cathode is reduced until the bridge indicator is no longer influenced by fluctuations in the voltage of the operating power source U.

Claims (2)

Patentansprüche:Patent claims: i. Schaltungsanordnung zur Unterdrückung der Spannungsabhängigkeit mit Gleichstrom betriebener Brückenschaltungen nach Patent 640 703, bei welchen zwei oder mehrere Elektronienstrecken einer Elektronenröhre als spannungsabhängige Widerstände in verschiedenen Brückenzweigen liegen, insbesondere zur Kompensation der Spannungsabhängigkeit ' bei Röhrengalvanometerschaltungen, da-,:, durch gekennzeichnet, daß parallel zu .,■,einer Elektronenstrecke oder einer Körnig ,; bination einer Elektronenstrecke mit ?** Ohmschen Widerständen ein Ohmscher Widerstand von solcher Größe geschaltet wird, daß eine Änderung· der Speisespannungen ohne Einfluß auf die Einstellung des in der Brücke liegenden Instrumentes ist.i. Circuit arrangement for suppressing the voltage dependency with DC operated bridge circuits according to patent 640 703, in which two or more electronic links an electron tube as voltage-dependent resistors in different bridge branches, in particular for Compensation of the voltage dependency 'in tube galvanometer circuits, because -,:, characterized in that parallel to., ■, an electron path or a grain ,; bination of an electron path with? ** ohmic resistances an ohmic Resistance of such a size is switched that a change · of the supply voltages has no influence on the setting of the instrument lying in the bridge. 2. Schaltungsanordnung nach Anspruch 1, bei der zwei Elektronenstrecken der gleichen Röhre, und zwar der Widerstand Anode-Kathode und der Widerstand Hilfsgitter-Kathode Brückenwiderstände sind, dadurch gekennzeichnet, daß der Kornpensationswiderstand parallel zu derjenigen der zwei Elektronenstrecken gelegt wird, deren Spannungsabhängigkeit zu groß ist.2. Circuit arrangement according to claim 1, in which two electron paths are the same Tube, namely the anode-cathode resistor and the auxiliary grid-cathode resistor Bridge resistors are characterized in that the compensation resistance is placed parallel to that of the two electron paths, their voltage dependence increases is great. Hierzu ι Blatt ZeichnungenFor this purpose ι sheet of drawings Berlin, gedruckt in der reichsdrdckerSIBerlin, printed by reichsdrdckerSI
DEB162203D 1933-09-01 1933-09-01 Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits Expired DE642479C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB162203D DE642479C (en) 1933-09-01 1933-09-01 Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB162203D DE642479C (en) 1933-09-01 1933-09-01 Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits

Publications (1)

Publication Number Publication Date
DE642479C true DE642479C (en) 1937-03-05

Family

ID=7004709

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB162203D Expired DE642479C (en) 1933-09-01 1933-09-01 Circuit arrangement for suppressing the voltage dependency with direct current operated bridge circuits, in particular with tube galvanometer circuits

Country Status (1)

Country Link
DE (1) DE642479C (en)

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