DE1591005C2 - Filter arrangement with a transformation and balun for the VHF range - Google Patents
Filter arrangement with a transformation and balun for the VHF rangeInfo
- Publication number
- DE1591005C2 DE1591005C2 DE1591005A DE1591005A DE1591005C2 DE 1591005 C2 DE1591005 C2 DE 1591005C2 DE 1591005 A DE1591005 A DE 1591005A DE 1591005 A DE1591005 A DE 1591005A DE 1591005 C2 DE1591005 C2 DE 1591005C2
- Authority
- DE
- Germany
- Prior art keywords
- filter
- transformation
- resonant circuit
- printed
- band
- 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
- 230000009466 transformation Effects 0.000 title claims description 17
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000002238 attenuated effect Effects 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 claims 4
- 238000005516 engineering process Methods 0.000 claims 3
- 108700028369 Alleles Proteins 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000009415 formwork Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- H03H7/38—Impedance-matching networks
-
- 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
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
Landscapes
- Filters And Equalizers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
3 43 4
Schaltplatte (Fig. 3) entstanden. Mit Hilfe eines außerdem noch die Leitungsbahnen eines Transfor-Circuit board (Fig. 3) emerged. With the help of a
Reihenschwingkreises 19, 20, der zwischen die Ein- mations- und Symmetriergliedes 35 für den UHF-Be-Series resonant circuit 19, 20, which is between the inspiration and balancing member 35 for the UHF loading
gangsklemme 12 und Masse geschaltet ist, ist diese reich. Dieses Transformations-und Symmetrierglied35output terminal 12 and ground is connected, this is rich. This transformation and balancing element 35
Saugstelle 7 so weit erweitert und nach tieferen Fre- ist aus Zweckmäßigkeitsgriinden auf der gedrucktenSuction point 7 expanded so far and after deeper freedom is on the printed for reasons of expediency
quenzen hingezogen, daß sich eine Bandsperre für das 5 Schaltungsplatte 30 angeordnet. Zur Korrektur desquenzen drawn that a bandstop filter for the 5 circuit board 30 is arranged. To correct the
Band II des VHF-Bereiches ergibt. Ein zusätzlicher Frequenzganges sind auf der Schaltplatte 30 mehrereVolume II of the VHF area results. There are several additional frequency responses on the circuit board 30
Parallelschwingkreis 21, 22, der zwischen der Ein- Ausgleichskapazitäten aufgedruckt, und zwar zwi-Parallel resonant circuit 21, 22, which is printed between the input compensation capacities, namely between
gangsklemme 11 und Masse liegt, sorgt für die not- sehen den Empfängereingangsklemmen 27 und 28,input terminal 11 and ground, provides the necessary receiver input terminals 27 and 28,
wendige Flankensteilheit im unteren Frequenzbereich zwischen der ersten Eingangsklemme 11 und MasseAgile edge steepness in the lower frequency range between the first input terminal 11 and ground
der Bandsperre. 10 sowie zwischen der zweiten Eingangsklemme 12 undthe band stop. 10 and between the second input terminal 12 and
An die Ausgangsklemme 13 und 14 des Transfor- Masse.To output terminals 13 and 14 of the transformer mass.
mations- und Symmetriergliedes 10 ist ein Hochpaß Das zweite Ausführungsbeispiel nach F i g. 4 untergeschaltet. Der Hochpaß besteht aus einem ΤΓ-förmig scheidet sich von dem ersten Ausführungsbeispiel geschalteten Vierpol 29, in dessen Längszweig ein nach F » S- 2 dadurch, daß der Reihenschwingkreis 19, Kondensator 23 liegt. Der erste Querzweig des Hoch- 15 20 an die Eingangsklemme 11 und der Parallelschwingpasses, der zwischen den Ausgangsklemmen 13 und 14 kreis 21> 22 über emen Kondensator 41 an die Ausliegt, wird durch einen Reihenschwingkreis 24, 25 ge- gangsklemme 14 des Transformations- und Syrnmebildet, während der zweite Querzweig, der zwischen tnergliedes 10 angeschlossen ist. Durch diese Andeden Empfängereingangsklemmen 27 und 28 liegt, aus runS wird der Frequenzgang des Filters (Kurve 8 in einer Spule 26 besteht. Der Hochpaß engt den Durch- 20 F 1 g. 1) nicht verändert, die Symmetrie aber verbessert, laßbereich des Transformations- und Symmetrierglie- da die Zusatzkreise in dieser Anordnung die Funktion des 10 ein und schiebt die untere Grenzfrequenz von des Transformations- und Symmetriergliedes 10 wenietwa 20 auf 47 MHz. Dadurch wird vor allem eine Ab- Ser stören.mations- and balancing member 10 is a high-pass filter. The second embodiment according to FIG. 4 subordinated. The high-pass filter consists of a ΤΓ-shaped four-pole circuit 29, which is connected in the first embodiment, in the longitudinal branch of which is a F » S- 2 due to the fact that the series resonant circuit 19, capacitor 23 is located. The first shunt branch of the high-15 20 to the input terminal 11 and the parallel resonance pass, which lies between the output terminals 13 and 14 circuit 21 > 22 via a capacitor 41, is through a series resonant circuit 24, 25 output terminal 14 of the transformation and Syrnme formed, while the second cross branch, which is connected between the tner link 10. By this Andeden receiver input terminals is 27 and 28, from run S of the frequency response of the filter (curve consists of a coil 26 8. The high-pass filter narrows the throughput 20 F 1 g. 1) is not changed, but the symmetry improved laßbereich of the transformation - and Symmetrierglie- because the additional circuits in this arrangement the function of the 10 and shifts the lower limit frequency of the transformation and balun 10 from about 20 to 47 MHz. This is he annoying especially a waste S.
strahlung von Zwischenfrequenzsignalen verhindert. F' S- 5 zeigt die Vorderseite einer gedrucktenradiation of intermediate frequency signals prevented. F ' S- 5 shows the front of a printed
Durch die Ausbildung des einen Querzweiges als Rei- 25 Schaltplatte 40 mit dem Transformations- und Sym-By designing one cross-branch as a line 25 circuit board 40 with the transformation and symmetry
henschwingkreis ergibt sich eine sehr steile Anstiegs- metnerglied 10 und den weiteren Leitungsbahnen fürThe resonant circuit results in a very steep rise meter element 10 and the other conduction paths for
flanke bei 47 MHz. Der Bildträger von Kanal II (48, den Aufbau der Filteranordnung nach F i g. 4. Deredge at 47 MHz. The image carrier of channel II (48, the structure of the filter arrangement according to FIG. 4. The
25 MHz) im Band I des VHF-Bereiches wird von der Kondensator 41 ist auf der Rückseite der gedruckten25 MHz) in Band I of the VHF range is printed by the capacitor 41 on the back of the
Filteranordnung ungedämpft übertragen, während Schaltungsplatte angeordnet, sein Kapazitätswert istFilter arrangement transmitted undamped, while circuit board is arranged, its capacitance value is
Eingangssignale mit einer Frequenz von etwa 40 MHz 30 aber so gering, daß er auch durch Leitungsbahnen derInput signals with a frequency of about 40 MHz 30 but so low that it can also pass through the conductive paths of the
bereits mit etwa 25 bis 30 db gedämpft werden. Der gedruckten Schaltungsplatte 40 aufgebaut werden kann.can be attenuated with around 25 to 30 db. The printed circuit board 40 can be constructed.
Frequenzgang der gesamten Filteranordnung folgt Die erfindungsgemäße Filteranordnung erlaubt es,Frequency response of the entire filter arrangement follows The filter arrangement according to the invention allows
der strichpunktierten Kurve 8 in F i g. 1. auf weitere sonst am Empfängereingang erforderlichethe dash-dotted curve 8 in FIG. Required first at long re else at the receiver input
F i g. 3 zeigt in einer Draufsicht die Vorderseite Selektionsmittel zu verzichten, so daß erhebliche Eineiner
gedruckten Schaltplatte 30 mit dem bekannten 35 sparungen möglich sind. Bei der Bemessung der Filter-Aufbau
des Transformations- und Symmetriergliedes anordnung ergaben sich für die herkömmlichen Bau-10
und den entsprechend geformten Leitungsbahnen elemente folgende Werte:
für den Aufbau der Filterahordnung nach F i g. 2. Ausführungsbeispiel nach F i g. 2
Verschiedene größere Kondensatoren und Spulen, derenF i g. 3 shows in a plan view the front side of the selection means to be dispensed with, so that considerable savings can be made on a printed circuit board 30 with the known 35. When dimensioning the filter structure of the transformation and balancing element arrangement, the following values resulted for the conventional construction 10 and the correspondingly shaped conductor path elements:
for the construction of the filter arrangement according to FIG. 2nd embodiment according to FIG. 2
Various larger capacitors and coils, whose
Aufbau in gedruckter Form unwirtschaftlich wäre, 40 A9 = H Wdg 0,5 CuI.
sind zweckfnäßigerweise als normale Bauelemente auf Q3 = 51 pF
der Rückseite der gedruckten Schallplatte 30 angeofd- Qs = 82 pF
net Es sind die Kondensatoren 23 und 25 des Hoch- Ausführungsbeispiel nach F i g. 4
paßvierpols 29 und die Spule 19 des an der Eingangsklemme 12 liegenden Reiherischwingkfeises. Auf der 45 Aa = H Wdg 0,5 CuI.
Rückseite der gedruckten Schaltplatte sind zusätzlich Qa = 65 pF
noch drei Dfähtbrücken 31^ 32 und 33 angeordnet. Qs = 82 pF
Die Vorderseite der gedruckten Schaltplatte 30 trägt Qi = 24 pFStructure in printed form would be uneconomical, 40 A9 = H Wdg 0.5 CuI.
are expediently as normal components at Q3 = 51 pF
the back of the printed record 30 is found- Qs = 82 pF
net There are the capacitors 23 and 25 of the high embodiment according to FIG. 4th
paßvierpols 29 and the coil 19 of the series oscillating circuit lying at the input terminal 12. On the 45 Aa = H Wdg 0.5 CuI.
Back of the printed circuit board are also Qa = 65 pF
three wire bridges 31 ^ 32 and 33 are arranged. Qs = 82 pF
The front of the printed circuit board 30 has Qi = 24 pF
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
potential (Masse) aufweisenden Anschlußpunkt ' Die erfindungsgemäße Filteranordnung besteht in liegende Parallelschwingkreis (21, 22) an eine ihrer Wirkungsweise aus zwei Bandpässen Und einer Eingangsklemme (11) der symmetrischen Seite frequenzmäßig zwischen den Bandpässen liegenden oder über einen Kondensator (41) an die Aus- Bandsperre. Dabei ist der erste Bandpaß auf Band I, gangsklemme (14) der unsymmetrischen Seite des 30 die Bandsperre auf Band II und der zweite Bandpaß Transformations- und Symmetriergliedes (10) ge- auf Band III des VHF-Bereiches gelegt. Der Aufbau schaltet ist und daß der Parallelschwingkreis (21, der erfindungsgemäßen Filteranordnung in gedruck-22), der Reihenschwingkreis (19, 20) und der ter Schaltungstechnik hat gegenüber einem nach kon- ! Höchpaß (29) derart bemessen sind, daß die ge- ventioneller Art aufgebauten Filter neben den gesamte Anordnung ein Filter bildet, welches 35 ringeren Herstellungskosten den zusätzlichen Vorteil, Band I Und Band III des VHF-Bereiches unge- daß für das Filter, bei gleicher elektrischer Qualität, dämpft und Band H des VHF-Bereiches stark mehrere Kondensatoren und Spulen eingespart wergedämpft überträgt. den können.Filter arrangement with a transformation printed circuit elements for the construction of a par and balancing element for the VHF range in the allele resonant circuit, a series resonant circuit and input of a television set, which in addition to a 5 serve as a high pass and that the high pass between spirally arranged conductor paths see an output terminal and a the Reference on a printed circuit board having built-up potential (ground) connection point of the th line transformer has further Schaltungsele- asymmetrical side of the transformation and elements in printed line technology, balancing element and the receiver input terminal, characterized in that the common 10 is arranged and that the series resonant circuit printed circuit elements to set up a connection between one of the two input terminals of the parallel resonant circuit (21, 22), a series symmetrical side and a reference potential resonant circuit (19, 20) and a high-pass filter ßpunkt the asymmetrical (29) serve and that the high-pass filter (29) is arranged between the side and that the connection point lying on one side at an output terminal (14) and a connection point having the reference potential (ground) Parallel resonant circuit to a single point (13) of the asymmetrical side of the trans- gangsklemme the symmetrical side or via formation and balancing element (10) and the one capacitor to the output terminal of the un-receiver input terminals (27, 28) arranged symmetrical side of the transformation and Symist and that the series resonant circuit (19, 20) 20 metering element is connected and that the parallel between one of the two input terminals (11, resonant circuit, the series resonant circuit and the high-12) of the symmetrical side and a pass are dimensioned such that the entire Anordzugspotential (ground) having connection forms a filter, which band I and band III point the asymmetry The VHF range is arranged on the second side and the VHF range is not attenuated and Band II of the and that the one-sided transmits the reference 25 VHF range strongly attenuated,
potential (ground) having connection point 'The filter arrangement according to the invention consists in lying parallel resonant circuit (21, 22) to one of its mode of operation of two bandpass filters and an input terminal (11) on the symmetrical side in terms of frequency between the bandpasses or via a capacitor (41) to the off - band stop. The first bandpass filter is placed on band I, the output terminal (14) on the asymmetrical side of 30, the bandstop filter on band II and the second bandpass transformation and balancing element (10) on band III of the VHF range. The structure is switched and that the parallel resonant circuit (21, the filter arrangement according to the invention in printed-22), the series resonant circuit (19, 20) and the ter circuit technology has compared to a after ! High pass (29) are dimensioned in such a way that the conventionally constructed filter forms a filter in addition to the entire arrangement, which has the additional advantage of lower manufacturing costs, Band I and Band III of the VHF range for the filter, for the same electrical quality, attenuates and band H of the VHF range greatly saves several capacitors and coils are attenuated transfers. the can.
einem Transformations- und Symmetrierglied für den F i g. 4 ein Schaltbild eines zweiten Ausführungs-The invention relates to a ladder arrangement with 45 plate for the first embodiment,
a transformation and balancing element for the F i g. 4 a circuit diagram of a second embodiment
aufgebauten Leitüngsüberträger weitere Schaltüngs- 5° Bei der erfindungsgemäßeh Filteranordnung ist das elemente in gedruckter Leituhgstechriik aufweist. Transformations- und Symmetrierglied in das Filtertungsbährien on a printed formwork panel processing panel for the second Aüsführüngsbeispiel.
built-up Leitüngsüberträger further switching 5 ° In the filter arrangement according to the invention, the elements are in printed Leituhgstechriik. Transformation and balancing element in the filter
schrieben sind, in flächenhafter Leitungsführung nach Der Frequenzgang des Transformations- und Sym-Included for adjustment of symmetrical 240-ohm connection. In the first embodiment, according to tennehzülinien to unbalanced 60-ohm inputs. F i g. 2 is the well-known transformation and symmetry of television sets, transforma- metring element is designated by 10. This Transformationstions- and Symmetrierglieder. Such transforma- 55 and balun 10 has two input clamping and balancing members are in the German men 11, 12 and two output terminals 13, 14. Described in more detail in patent specification 857 648 and in which the input terminals 11 and 12 is an antenna 15 associated drawing, in particular F i g. 1, formed via a symmetrical antenna cable 16 and two. It is known that transformation and symmetric isolating capacitors 17 and 18 are connected. The metering elements and crossovers for VHF / UHF 6 ° output terminal 13 are connected to the reference potential (ground) in receiver connection cords, as they are, for example, while output terminal 14 forms the second instructions in German Auslegeschrift 1 163 926, the termination point for the asymmetrical side,
are written, in planar routing according to The frequency response of the transformation and symmetry
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB0094461 | 1967-09-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1591005B1 DE1591005B1 (en) | 1970-08-20 |
DE1591005C2 true DE1591005C2 (en) | 1974-04-11 |
Family
ID=6987594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1591005A Expired DE1591005C2 (en) | 1967-09-14 | 1967-09-14 | Filter arrangement with a transformation and balun for the VHF range |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1591005C2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2828838C2 (en) * | 1977-07-01 | 1983-10-20 | Hitachi, Ltd., Tokyo | RF input circuit for television receivers |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1163926B (en) * | 1960-08-05 | 1964-02-27 | Siemens Ag | Receiver connection cord for unbalanced receiving antenna systems |
-
1967
- 1967-09-14 DE DE1591005A patent/DE1591005C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1591005B1 (en) | 1970-08-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C2 | Grant after previous publication (2nd publication) |