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DE517079C - Arrangement of capacitors in order, within certain limits, to change the ratio of the limit frequencies assigned to a variable capacitor with a linear frequency characteristic and the maximum value C as well as the minimum value c of the capacitance while maintaining the linear character - Google Patents

Arrangement of capacitors in order, within certain limits, to change the ratio of the limit frequencies assigned to a variable capacitor with a linear frequency characteristic and the maximum value C as well as the minimum value c of the capacitance while maintaining the linear character

Info

Publication number
DE517079C
DE517079C DEC39670D DEC0039670D DE517079C DE 517079 C DE517079 C DE 517079C DE C39670 D DEC39670 D DE C39670D DE C0039670 D DEC0039670 D DE C0039670D DE 517079 C DE517079 C DE 517079C
Authority
DE
Germany
Prior art keywords
capacitance
variable capacitor
capacitors
linear
ratio
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
DEC39670D
Other languages
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.)
CIE GENERALE DE TELEGRAPHIE ET
Original Assignee
CIE GENERALE DE TELEGRAPHIE ET
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 CIE GENERALE DE TELEGRAPHIE ET filed Critical CIE GENERALE DE TELEGRAPHIE ET
Application granted granted Critical
Publication of DE517079C publication Critical patent/DE517079C/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G5/00—Capacitors in which the capacitance is varied by mechanical means, e.g. by turning a shaft; Processes of their manufacture
    • H01G5/38—Multiple capacitors, e.g. ganged
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/20—Continuous tuning of single resonant circuit by varying inductance only or capacitance only

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Description

Anordnung von Kondensatoren, um innerhalb bestimmter Grenzen das einem veränderlichen Kondensator mit frequenzlinearer Charakteristik und dem Höchstwert C sowie dem mindestwert c der Kapazität zugeordnete Verhältnis der Grenzfrequenzen unter Aufrechterhaltung des linearen Charakters zu ändern Man benutzt zur Zeit sehr häufig, und zwar besonders bei Empfängern für drahtlose Nachrichtenübermittlung, veränderliche Kondensatoren, die eine lineare Frequenzänderung ergeben. Die Form der einzelnen Kondensatorplatten oder der Nocken oder ähnlicher Antriebsvorrichtungen errechnet sich leicht aus dem Verhältnis des Höchst- zum Mindestwert eines solchen Kondensators oder genauer aus dem Kreis, in den er eingefügt ist. Jedoch ist zu bemerken, daß die errechnete Form nicht mehr stimmt, wenn man diese Werte ändert oder andere Frequenzen anwenden will als die, welche man der Berechnung zugrunde gelegt hat.Arrangement of capacitors, within certain limits the one variable capacitor with frequency linear characteristic and the maximum value C and the ratio of the limit frequencies assigned to the minimum value c of the capacitance to change while maintaining the linear character. One uses a lot at the moment Frequently, especially with wireless messaging receivers, variable capacitors that give a linear frequency change. Form the individual capacitor plates or the cams or similar drive devices is easily calculated from the ratio of the maximum to the minimum value of such Capacitor or, more precisely, from the circle in which it is inserted. However, it is too notice that the calculated shape is no longer correct if you change these values or want to use other frequencies than those on which the calculation is based has laid.

Die vorliegende Erfindung bezweckt die heseitigung dieses Übelstandes, und soll es möglich machen, innerhalb weiter Grenzen das Verhältnis des Höchst- zum Mindestwert zu ändern, ohne merklich das Gesetz der linearen Frequenzänderung zu verlassen.The present invention aims to eliminate this drawback, and should make it possible, within wide limits, to determine the ratio of the maximum to change to the minimum value without noticing the law of linear frequency change to leave.

Der Zweck der Erfindung wird dadurch erreicht, daß man zu dem veränderlichen Kondensator einen unveränderlichen 1' in Reihe schaltet und diesen beiden oder auch dem veränderlichen Kondensator allein einen zweiten gegenüber 1' sehr kleinen Kondensator y nebenschließt.The purpose of the invention is achieved by going to the changeable Capacitor connects an invariable 1 'in series and these two or also the variable capacitor alone has a second capacitor which is very small compared to 1 ' y bypasses.

In den Abb. i und z sind diese beiden Schaltungen dargestellt. z und z' bezeichnen die Klemmen des Ganzen, i den veränderlichen Kondensator.These two circuits are shown in Figs. I and z. z and z 'denote the terminals of the whole, i the variable capacitor.

Die Kapazitäten der unveränderlichen Kondensatoren müssen der Gleichung genügen, in der C den Höchstwert und c den Mindestwert der Kapazität des veränderlichen Kondensators bedeutet.The capacities of the immutable capacitors must be the equation in which C is the maximum value and c is the minimum value of the capacitance of the variable capacitor.

Gleichzeitig ergibt sich, daß das von der Anordnung der Kondensatoren nach der Erfindung eingeschlossene Frequenzverhältnis, verglichen mit dem des veränderlichen Kondensators allein, den Wert besitzt. Mathematische Betrachtungen zeigen, daß man dem so bestimmten Frequenzverhältnis Werte geben kann, die zwischen i und 0,7 liegen, wobei der Wert 0,7 als Grenzfall zu betrachten ist; für ihn beträgt y nur ein Fünftel der restlichen Kapazität c.At the same time it results that the frequency ratio included by the arrangement of the capacitors according to the invention, compared with that of the variable capacitor alone, the value owns. Mathematical considerations show that the frequency ratio determined in this way can be given values between i and 0.7 , the value 0.7 being regarded as a borderline case; for him, y is only one fifth of the remaining capacity c.

Die günstigsten Werte ergeben sich, wenn der veränderliche Kondensator ein Verhältnis des Höchst- zum Mindestwert von g : io besitzt.The most favorable values are obtained when the variable capacitor has a maximum to minimum ratio of g: io.

Claims (1)

PATENTANSPRUCH: Anordnung von Kondensatoren, um innerhalb bestimmter Grenzen das einem veränderlichen Kondensator mit frequenzlinearer Charakteristik und dem Höchstwert C sowie dem Mindestwert c der Kapazität zugeordnete Verhältnis der Grenzfrequenzen. unter Aufrechterhaltung des linearen Charakters zu ändern, da. durch gekennzeichnet, daa mit dem veränderlichen Kondensator ein unveränderlicher Kondensatorvon einer Kapazität I' >C in Reihe geschaltet ist, daß parallel zum veränderlichen Kondensator oder zU beiden hintereinandergeschaheten Kondensatoren ein unveränderlicher Kondensator vgn einer Kapazität y < o,2 c liegt und daB die Kapazitätswerte durch die Gleichung verknüpft sind.Claim: array of capacitors to inn outside certain limits a variable capacitor having a frequency-linear characteristic and the maximum value and the minimum value C c of the capacitance associated ratio of the cut-off frequencies. while maintaining the linear character change since. characterized in that an unchangeable capacitor with a capacitance I '> C is connected in series with the variable capacitor, that an unchangeable capacitor with a capacitance y <0.2c is parallel to the variable capacitor or both capacitors in series, and that the capacitance values pass through the equation are linked.
DEC39670D 1927-02-15 1927-04-14 Arrangement of capacitors in order, within certain limits, to change the ratio of the limit frequencies assigned to a variable capacitor with a linear frequency characteristic and the maximum value C as well as the minimum value c of the capacitance while maintaining the linear character Expired DE517079C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR517079X 1927-02-15

Publications (1)

Publication Number Publication Date
DE517079C true DE517079C (en) 1931-01-30

Family

ID=8915636

Family Applications (1)

Application Number Title Priority Date Filing Date
DEC39670D Expired DE517079C (en) 1927-02-15 1927-04-14 Arrangement of capacitors in order, within certain limits, to change the ratio of the limit frequencies assigned to a variable capacitor with a linear frequency characteristic and the maximum value C as well as the minimum value c of the capacitance while maintaining the linear character

Country Status (1)

Country Link
DE (1) DE517079C (en)

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