DE2259991C3 - Circuit arrangement for attenuating alternating current signals - Google Patents
Circuit arrangement for attenuating alternating current signalsInfo
- Publication number
- DE2259991C3 DE2259991C3 DE19722259991 DE2259991A DE2259991C3 DE 2259991 C3 DE2259991 C3 DE 2259991C3 DE 19722259991 DE19722259991 DE 19722259991 DE 2259991 A DE2259991 A DE 2259991A DE 2259991 C3 DE2259991 C3 DE 2259991C3
- Authority
- DE
- Germany
- Prior art keywords
- diode
- control
- feedback loop
- input
- damping
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
- H03H7/253—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
- H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes
Landscapes
- Amplifiers (AREA)
- Networks Using Active Elements (AREA)
- Attenuators (AREA)
- Developing Agents For Electrophotography (AREA)
- Exhaust Gas After Treatment (AREA)
Description
ist über einen Kondensator C22 mit Erde verbunden. Der zuerst erwähnte Teil der Rückkopplungsschleife ist zwischen den in Serie geschalteten Kondensatoren C 23 und C'24 an die Hochfiequenzleitung angeschlossen, der zweite Teil dec Rückkopplungsschleife ist zwischen den in Serie geschalteten Kondensatoren C 21 und C 22 mit der Hochfrequenzleitung/1 verbunden. is connected to earth via a capacitor C22. The first mentioned part of the feedback loop is between the series capacitors C 23 and C'24 connected to the high-frequency line, the second part of the feedback loop is connected to the high-frequency line / 1 between the series-connected capacitors C 21 and C 22.
In der Fig. 3 ist ein Beispiel angegeben, wie der Tei&peraturgang der Diode D12 kompensiert werden kann, so daß mögliche Tsmperaturänderungen in der unmittelbaren Nachbarschaft der Diode DIl den Steuerstrom durch diese Diode und damit die Dämpfung (Widerstand) dieser Diode nicht beeinflussen. Zwischen dem Eingang I des Differenzverstärkers und dessen ÜDngen Bestandteilen ist eine Diode D 31 eingefügt, dereü Anode über einen Widerstand/? 3 am positiven Pol einer Batterie £3 liegt Für einen bestimmten Strom durch die Diode D 31, der im wesentlichen durch die Batterie £3 und den Widerstand RZ bestimmt wird und z.B. 10μΑ beträgt, ist die Diode D12 temperaturkompensiert, wenn der Strom durch diese Diode ebenfalls 10 μΑ beträgt Temperaturänderungen bei Strömen anderer Größe durch die Diode D12 können darüber hinaus mit Hilfe eines Thermistometzwerkes kompensiert werden.In Fig. 3 an example is given how the Tei & peraturgang of the diode D 12 can be compensated so that possible temperature changes in the immediate vicinity of the diode DIl do not affect the control current through this diode and thus the attenuation (resistance) of this diode. A diode D 31 is inserted between the input I of the differential amplifier and its components, the anode of which is connected via a resistor /? 3 is at the positive pole of a battery £ 3 For a certain current through the diode D 31, which is essentially determined by the battery £ 3 and the resistor RZ and is, for example, 10μΑ, the diode D 12 is temperature compensated when the current through it Diode is also 10 μΑ Temperature changes in the case of currents of a different size through the diode D12 can also be compensated for with the aid of a thermistor network.
Vorstehend wurde die Erfindung in Zusammenhang mit Dämpfungselementen in Form von gleichstromgesteuerten Dioden beschrieben. Die Erfindung ist jedoch nicht auf solche Dämpfungselemente mit veränderbarem Widerstand beschränkt, es können vielmehr im Prinzip auch andere Arten von Dämpfungselementen mit steuerbarer Impedanz verwendet werden, z. B. stromgesteueiie Varaktoren.The invention has been described above in connection with damping elements in the form of direct current-controlled diodes. However, the invention is not limited to such damping elements with variable resistance. Rather, other types of damping elements with controllable impedance can be used in principle, z. B. stromgesteueiie varactors.
Außerdem kann das in eine RückkopplungsschleifeAlso, that can get into a feedback loop
ίο eingefügte Dämpfungselement durch weitere Dämpfungselemente ergänzt werden, die z. B. in die Leitung /1 eingefügt sind, ohne daß der Rahmen der Erfindung durchbrochen wird.ίο inserted damping element can be supplemented by additional damping elements that z. B. into the line / 1 are inserted without departing from the scope of the invention.
Gemäß Fig. 2 liegen die beiden Teile der Rück-According to Fig. 2, the two parts of the rear
kopplungsschleifen zueinander parallel. Sie können jedoch nach entsprechender Polaritätsumkehr z.B. der Diode D 21 und nach entsprechender Dimensionierung der anderen Schaltkreiselemente auch in Reihe geschaltet sein.coupling loops parallel to each other. However, after a corresponding polarity reversal, for example the diode D 21 and after appropriate dimensioning of the other circuit elements, they can also be connected in series.
ao Als Dimensionierungsbeispiel für die Schaltungsanordnung gemäß Fig. 2 können nachstehende Werte angenommen werden.ao As a dimensioning example for the circuit arrangement according to FIG. 2, the following values can be assumed.
C21 = C22 = C23 = CiA = C26 = Cl = 1 nF C22 = C25 = 1OnFC21 = C22 = C23 = CiA = C26 = Cl = 1 nF C22 = C25 = 1OnF
Ä22 = Ä21 =■ 3,9 kohmÄ22 = Ä21 = ■ 3.9 kohm
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1627771A SE350891B (en) | 1971-12-20 | 1971-12-20 |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2259991A1 DE2259991A1 (en) | 1973-07-05 |
DE2259991B2 DE2259991B2 (en) | 1974-04-04 |
DE2259991C3 true DE2259991C3 (en) | 1974-10-31 |
Family
ID=20301979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19722259991 Expired DE2259991C3 (en) | 1971-12-20 | 1972-12-07 | Circuit arrangement for attenuating alternating current signals |
Country Status (7)
Country | Link |
---|---|
CH (1) | CH547038A (en) |
DE (1) | DE2259991C3 (en) |
FR (1) | FR2165610A5 (en) |
GB (1) | GB1405660A (en) |
IT (1) | IT972640B (en) |
NL (1) | NL184139C (en) |
SE (1) | SE350891B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2037514B (en) * | 1978-12-13 | 1982-11-24 | Marconi Instruments Ltd | Microwave attenuation |
-
1971
- 1971-12-20 SE SE1627771A patent/SE350891B/xx unknown
-
1972
- 1972-12-07 DE DE19722259991 patent/DE2259991C3/en not_active Expired
- 1972-12-12 NL NL7216846A patent/NL184139C/en active Search and Examination
- 1972-12-19 GB GB5863072A patent/GB1405660A/en not_active Expired
- 1972-12-19 FR FR7245260A patent/FR2165610A5/fr not_active Expired
- 1972-12-20 IT IT3325672A patent/IT972640B/en active
- 1972-12-20 CH CH1857972A patent/CH547038A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NL184139C (en) | 1989-04-17 |
GB1405660A (en) | 1975-09-10 |
NL7216846A (en) | 1973-06-22 |
DE2259991A1 (en) | 1973-07-05 |
SE350891B (en) | 1972-11-06 |
DE2259991B2 (en) | 1974-04-04 |
IT972640B (en) | 1974-05-31 |
CH547038A (en) | 1974-03-15 |
FR2165610A5 (en) | 1973-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) | ||
E77 | Valid patent as to the heymanns-index 1977 |