EP0247542B1 - Integrated microwave circuit - Google Patents

Integrated microwave circuit Download PDF

Info

Publication number
EP0247542B1
EP0247542B1 EP87107507A EP87107507A EP0247542B1 EP 0247542 B1 EP0247542 B1 EP 0247542B1 EP 87107507 A EP87107507 A EP 87107507A EP 87107507 A EP87107507 A EP 87107507A EP 0247542 B1 EP0247542 B1 EP 0247542B1
Authority
EP
European Patent Office
Prior art keywords
strip lines
component
stub
calibrating element
element according
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 - Lifetime
Application number
EP87107507A
Other languages
German (de)
French (fr)
Other versions
EP0247542A1 (en
Inventor
Friedrich Dr.-Ing. Lange
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT87107507T priority Critical patent/ATE79983T1/en
Publication of EP0247542A1 publication Critical patent/EP0247542A1/en
Application granted granted Critical
Publication of EP0247542B1 publication Critical patent/EP0247542B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/207—Hollow waveguide filters
    • H01P1/209—Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide

Definitions

  • the invention relates to an integrated microwave circuit according to the preamble of claim 1, which is known from US-A-3 768 050 From DE-PS 22 53 176 a Y-branching circulator for use in integrated microwave circuits is known in which a continuous metallic coating is arranged on one side of the substrate and a circulator with strip lines leading away from the branching point is arranged on the other side. Idle stub lines are connected to the strip lines, the fine adjustment of the input impedance of the circulator is carried out by removing the length of the stub lines.
  • FIG. 1 shows an integrated microwave circuit according to the prior art, in which a component 2 with connected strip lines 3 and 4 is arranged on a substrate 1.
  • a metallic coating 5 is applied, which is connected to the reference potential.
  • An interference capacitance 6 is effective between the two connections of the component 2 and can spread in a value range C min ... C max .
  • the integrated microwave circuit must now be adjusted for the operating frequency so that the interference capacity is ineffective. This can be done by an inductance connected in parallel to the interference capacitance, the size of which is not exactly known due to the fluctuations in the interference capacitance.
  • the object of the invention is therefore to provide a balancing element of the type mentioned at the outset, which results in a parallel inductance at the operating frequency, which generates the smallest possible additional capacitances and is easy to balance.
  • 2 a in turn contains the component 2 with the strip lines 3 and 4 as supply lines and the one indicated Interference capacity 6.
  • the stub lines 12 and 14 are provided, which are designed as coupled strip lines and of which one strip is connected to the feed line 3 and the other strip to the feed line 4 for the component 2.
  • the stub 12 is terminated by a line short circuit 13 so that the inductance L 1 thereby generated compensates for the minimum interference capacitance C min at the operating frequency f0, ie at the center frequency of the operating bandwidth, that is to say that
  • the second stub 14 is terminated by a strip line 15 so that the inductance L2 thus generated is initially "infinitely" large and the inductors L 3.1 and L 3.2 generated the capacitances C 1.1 and C 1.2 of the first Strip line 12 to compensate for ground, that is
  • a bond wire 16 is additionally arranged on the strip line 14, through which the inductance L 2 is reduced to such an extent that the resulting inductance L K the interference capacity at the operating frequency is compensated. So it has to be.
  • FIG. 2b shows the equivalent circuit diagram of the arrangement according to FIG. 2a.
  • the inductance L2 initially generated by the connected stub 14 is the inductance L1, which is generated by the short-circuited coupled strip line 12, directly connected in parallel.
  • the capacitances C 1.1 , C 1.2 generated by the coupled strip line 12 and the line short circuit 13 against ground act at the two connection points of the inductors L 1 and L 2 against ground.
  • the chosen termination of the strip line 14 results in inductances L 3.1 and L 3.2 parallel to these capacitances. Parallel to the inductances L1 and L2, the component 2 with the interference capacitance Cs is effective, this interference capacitance corresponds to the indicated capacitor 6 according to FIG. 2a.
  • FIG. 3 shows a modification of the arrangement according to FIG. 2a.
  • a series of bond wires 17, 18 .... 22 are attached to the strip line 14.
  • the first additional bond wire 17 is placed so that the trimming element is thus suitable for compensating for the maximum interference capacitance C max , that is to say the effective inductance is. If the resonance frequency of the arrangement then with the operating frequency does not yet match, the additional bond wires 17, 18 ... are removed in succession until the resonance frequency f R corresponds to the condition coincides with the operating frequency.
  • dielectric plates can therefore be arranged on the stub 14 between the component (2) and the first bond wire not removed and / or on the stub 12.
  • the stub lines can be modified in accordance with FIG. 4 in order to reduce the ground capacitances C 1.1 and C 1.2 of the stub line 12 and to obtain suitable inductances L 3.1 and L 3.2 against ground.
  • 4 shows parts of coupled strip lines, the termination of which is modified.
  • FIG. 4a shows a strip line 24 of length l which is open at the end and
  • FIG. 4b shows a strip line 25 of length l owned which is short-circuited to the ground layer.

Landscapes

  • Microwave Amplifiers (AREA)
  • Semiconductor Integrated Circuits (AREA)
  • Waveguides (AREA)

Abstract

An integrated microwave circuit having a dielectric substrate on the one side of which there is arranged a penetrating metallic coating and on the other side of which there is arranged at least one component (2) with two strip lines (3, 4) connected to it, and having at least one tuning element (12). In this case, the tuning element is used for compensating for the interfering parallel capacitance (6) of the component, by generating an inductance. The tuning element contains at least one coupled strip line, which is short-circuited at the end (13), is arranged on the substrate and whose terminals are connected to the component leads. With respect to minimising the earth capacitance of the tuning element, preferably two additional short-circuited, coupled strip lines (12, 14) are provided, which are arranged on both sides of the active component of the integrated microwave circuit. <IMAGE>

Description

Die Erfindung betrifft einen integrierten Mikrowellenschaltkreis entsprechend dem Oberbegriff des Patentanspruchs 1, der aus der Druckschrift US-A-3 768 050 bekannt ist
Aus der DE-PS 22 53 176 ist ein Y-Verzweigungszirkulator für die Verwendung in integrierten Mikrowellen-Schaltkreisen bekannt, bei dem auf einer Seite des Substrats ein durchgehender metallischer Belag und auf der anderen Seite ein Zirkulator mit vom Verzweigungspunkt wegführenden Streifenleitungen angeordnet ist. An die Streifenleitungen sind leerlaufende Stichleitungen angeschaltet, die Feineinstellung der Eingangsimpedanz des Zirkulators erfolgt durch Längenabtragung der Stichleitungen.The invention relates to an integrated microwave circuit according to the preamble of claim 1, which is known from US-A-3 768 050
From DE-PS 22 53 176 a Y-branching circulator for use in integrated microwave circuits is known in which a continuous metallic coating is arranged on one side of the substrate and a circulator with strip lines leading away from the branching point is arranged on the other side. Idle stub lines are connected to the strip lines, the fine adjustment of the input impedance of the circulator is carried out by removing the length of the stub lines.

In der Fig. 1 ist eine integrierte Mikrowellenschaltung nach dem Stande der Technik dargestellt, bei der auf einem Substrat 1 ein Bauteil 2 mit angeschlossenen Streifenleitungen 3 und 4 angeordnet ist. Auf der Rückseite des Substrats ist ein metallischer Belag 5 aufgebracht, der mit Bezugspotential verbunden ist. Zwischen den beiden Anschlüssen des Bauteils 2 ist eine Störkapazität 6 wirksam, die in einem Wertebereich Cmin...Cmax streuen kann. Die integrierte Mikrowellenschaltung ist nun für die Betriebsfrequenz so abzugleichen, daß die Störkapazität unwirksam wird. Dies kann durch eine zur Störkapazität parallel geschaltete Induktivität geschehen, deren Größe aber wegen der Schwankungen der Störkapazität nicht genau bekannt ist.1 shows an integrated microwave circuit according to the prior art, in which a component 2 with connected strip lines 3 and 4 is arranged on a substrate 1. On the back of the substrate, a metallic coating 5 is applied, which is connected to the reference potential. An interference capacitance 6 is effective between the two connections of the component 2 and can spread in a value range C min ... C max . The integrated microwave circuit must now be adjusted for the operating frequency so that the interference capacity is ineffective. This can be done by an inductance connected in parallel to the interference capacitance, the size of which is not exactly known due to the fluctuations in the interference capacitance.

Die Aufgabe der Erfindung besteht also darin, ein Abgleichelement der eingangs erwähnten Art zu schaffen, das bei der Betriebsfrequenz eine Parallelinduktivität ergibt, die möglichst geringe zusätzliche Kapazitäten erzeugt und leicht abgleichbar ist.The object of the invention is therefore to provide a balancing element of the type mentioned at the outset, which results in a parallel inductance at the operating frequency, which generates the smallest possible additional capacitances and is easy to balance.

Erfindungsgemäß wird die Aufgabe durch ein Abgleichelement der eingangs erwähnten Art gelöst, das die kennzeichnenden Merkmale des Patentanspruchs 1 aufweist.According to the invention, the object is achieved by a balancing element of the type mentioned at the outset, which has the characterizing features of patent claim 1.

Zweckmäßige Weiterbildungen des erfindungsgemäßen Abgleichelements sind in den Patentansprüchen 2 bis 6 näher beschrieben.Expedient developments of the balancing element according to the invention are described in more detail in claims 2 to 6.

Die Erfindung soll im folgenden anhand der Zeichnung näher erläutert werden.The invention will be explained in more detail below with reference to the drawing.

In der Zeichnung zeigt

Fig. 1
einen integrierten Mikrowellenschaltkreis nach dem Stande der Technik,
Fig. 2a
ein erfindungsgemäßes Abgleichelement,
Fig. 2b
eine Ersatzschaltung zur Fig. 2,
Fig. 3
eine Weiterbildung des Abgleichelements nach Fig. 2a,
Fig. 4a, b
modifizierte Stichleitungen und
Fig. 5
ein Abgleichelement mit den modifizierten Stichleitungen nach Fig. 4.
In the drawing shows
Fig. 1
an integrated microwave circuit according to the prior art,
Fig. 2a
an adjustment element according to the invention,
Fig. 2b
an equivalent circuit to FIG. 2,
Fig. 3
a development of the adjustment element according to FIG. 2a,
4a, b
modified spur lines and
Fig. 5
a trimming element with the modified stub lines according to FIG. 4.

Die Fig. 1 ist bei der Darstellung des Standes der Technik bereits erläutert worden, so daß an dieser Stelle nicht weiter darauf eingegangen wird.1 has already been explained in the illustration of the prior art, so that it will not be discussed further at this point.

Die Fig. 2 a enthält wiederum das Bauelement 2 mit den Streifenleitungen 3 und 4 als Zuleitungen sowie der angedeuteten Störkapazität 6.2 a in turn contains the component 2 with the strip lines 3 and 4 as supply lines and the one indicated Interference capacity 6.

Zusätzlich sind die Stichleitungen 12 und 14 vorgesehen, die als gekoppelte Streifenleitungen ausgebildet sind und von denen jeweils der eine Streifen mit der Zuleitung 3 und der andere Streifen mit der Zuleitung 4 für das Bauelement 2 verbunden sind. Die Stichleitung 12 ist durch einen Leitungskurzschluß 13 so abgeschlossen, daß die dadurch erzeugte Induktivität L₁ die minimale Störkapazität Cmin bei der Betriebsfrequenz f0 also bei der Mittenfrequenz der Betriebsbandbreite, kompensiert, daß also

Figure imgb0001
In addition, the stub lines 12 and 14 are provided, which are designed as coupled strip lines and of which one strip is connected to the feed line 3 and the other strip to the feed line 4 for the component 2. The stub 12 is terminated by a line short circuit 13 so that the inductance L 1 thereby generated compensates for the minimum interference capacitance C min at the operating frequency f0, ie at the center frequency of the operating bandwidth, that is to say that
Figure imgb0001

Die zweite Stichleitung 14 wird durch eine Streifenleitung 15 so abgeschlossen, daß die somit erzeugte Induktivität L₂ zunächst "unendlich" groß ist und die erzeugten Induktivitäten L3,1 und L3,2 die Kapazitäten C1,1 und C1,2 der ersten Streifenleitung 12 gegen Masse kompensieren, daß also

Figure imgb0002
The second stub 14 is terminated by a strip line 15 so that the inductance L₂ thus generated is initially "infinitely" large and the inductors L 3.1 and L 3.2 generated the capacitances C 1.1 and C 1.2 of the first Strip line 12 to compensate for ground, that is
Figure imgb0002

In veränderlichen Abstand vom Bauelement 2 ist auf der Streifenleitung 14 zusätzlich ein Bonddraht 16 angeordnet, durch den die Induktivität L₂ soweit verringert wird, daß die entstehende Induktivität LK

Figure imgb0003

die Störkapazität bei der Betriebsfrequenz kompensiert. Es muß also
Figure imgb0004
sein.At a variable distance from the component 2, a bond wire 16 is additionally arranged on the strip line 14, through which the inductance L 2 is reduced to such an extent that the resulting inductance L K
Figure imgb0003
the interference capacity at the operating frequency is compensated. So it has to
Figure imgb0004
be.

Durch den Abstand des Bonddrahtes 16 zum Substrat ist dessen kapazitiver Einfluß vergleichsweise sehr gering, so daß die Kompensation gegen Masse durch diesen Bonddraht praktisch nicht beeinflußt wird.Due to the distance between the bond wire 16 and the substrate, its capacitive influence is comparatively very small, so that the compensation against ground is practically not influenced by this bond wire.

In der Fig. 2b ist das Ersatzschaltbild der Anordnung nach Fig. 2a dargestellt. Die durch die beschaltete Stichleitung 14 zunächst erzeugte Induktivität L₂ ist der Induktivität L₁, die von der kurzgeschlossenen gekoppelten Streifenleitung 12 erzeugt wird, direkt parallelgeschaltet. Die durch die gekoppelte Streifenleitung 12 und den Leitungskurzschluß 13 gegen Masse erzeugten Kapazitäten C1,1, C1,2 wirken an den beiden Anschlußpunkten der Induktivitäten L₁ und L₂ gegen Masse. Durch den gewählten Abschluß der Streifenleitung 14 ergeben sich parallel zu diesen Kapazitäten die Induktivitäten L3,1 und L3,2. Parallel zu den Induktivitäten L₁ und L₂ ist das Bauelement 2 mit der Störkapazität Cs wirksam, diese Störkapazität entspricht dem angedeuteten Kondensator 6 nach Fig. 2a.2b shows the equivalent circuit diagram of the arrangement according to FIG. 2a. The inductance L₂ initially generated by the connected stub 14 is the inductance L₁, which is generated by the short-circuited coupled strip line 12, directly connected in parallel. The capacitances C 1.1 , C 1.2 generated by the coupled strip line 12 and the line short circuit 13 against ground act at the two connection points of the inductors L 1 and L 2 against ground. The chosen termination of the strip line 14 results in inductances L 3.1 and L 3.2 parallel to these capacitances. Parallel to the inductances L₁ and L₂, the component 2 with the interference capacitance Cs is effective, this interference capacitance corresponds to the indicated capacitor 6 according to FIG. 2a.

In der Fig. 3 ist eine Modifikation der Anordnung nach Fig. 2a dargestellt. Als Ersatz für den Bonddraht 16 sind auf der Streifenleitung 14 eine Reihe von Bonddrähten 17, 18 .... 22 angebracht. Dabei ist der erste zusätzliche Bonddraht 17 so plaziert, daß das Abgleichelement damit zur Kompensation der maximalen Störkapazität Cmax geeignet ist, daß also die wirksame Induktivität

Figure imgb0005

ist. Falls die Resonanzfrequenz der Anordnung dann mit der Betriebsfrequenz noch nicht übereinstimmt, werden nacheinander die zusätzlichen Bonddrähte 17, 18 ... entfernt, bis die Resonanzfrequenz fR entsprechend der Bedingung
Figure imgb0006
mit der Betriebsfrequenz übereinstimmt.FIG. 3 shows a modification of the arrangement according to FIG. 2a. As a replacement for the bond wire 16, a series of bond wires 17, 18 .... 22 are attached to the strip line 14. The first additional bond wire 17 is placed so that the trimming element is thus suitable for compensating for the maximum interference capacitance C max , that is to say the effective inductance
Figure imgb0005
is. If the resonance frequency of the arrangement then with the operating frequency does not yet match, the additional bond wires 17, 18 ... are removed in succession until the resonance frequency f R corresponds to the condition
Figure imgb0006
coincides with the operating frequency.

Wegen der begrenzten Anzahl möglicher zusätzlicher Bonddrähte kann ein Feinabgleich Schwierigkeiten bereiten. Zum Feinabgleich können deshalb auf der Stichleitung 14 zwischen dem Bauteil (2) und dem ersten nicht entfernten Bonddraht und/oder auf der Stichleitung 12 dielektrische Plättchen angeordnet werden.Due to the limited number of possible additional bond wires, fine adjustment can be difficult. For fine adjustment, dielectric plates can therefore be arranged on the stub 14 between the component (2) and the first bond wire not removed and / or on the stub 12.

Zur Verringerung der Massekapazitäten C1,1 und C1,2 der Stichleitung 12 und zum Erhalt geeigneter Induktivitäten L3,1 und L3,2 gegen Masse können die Stichleitungen entsprechend Fig. 4 modifiziert werden. In der Fig. 4 sind Teile gekoppelter Streifenleitungen dargestellt, deren Abschluß modifiziert ist. In der Fig. 4a ist eine am Ende offene Streifenleitung 24 der Länge l und in Fig. 4b eine gegen den Massebelag kurzgeschlossene Streifenleitung 25 der Länge lʹ dargestellt. Diese Anordnungen können mit den integrierten Mikrowellenschaltkreisen nach Fig. 2a und Fig. 3 kombiniert werden, so daß beispielsweise eine Anordnung entsprechend Fig. 5 entsteht.The stub lines can be modified in accordance with FIG. 4 in order to reduce the ground capacitances C 1.1 and C 1.2 of the stub line 12 and to obtain suitable inductances L 3.1 and L 3.2 against ground. 4 shows parts of coupled strip lines, the termination of which is modified. FIG. 4a shows a strip line 24 of length l which is open at the end and FIG. 4b shows a strip line 25 of length l kurz which is short-circuited to the ground layer. These arrangements can be combined with the integrated microwave circuits according to FIGS. 2a and 3, so that, for example, an arrangement corresponding to FIG. 5 is created.

Claims (6)

  1. Integrated microwave circuit comprising a dielectric substrate, on one side of which a continuous metallic coating (5) is arranged and on the other side of which at least one component (2) having two strip lines (3, 4) connected to the component is arranged, to which strip lines at least one calibrating element for a parasitic capacitance (6) located in parallel with the component is connected, characterised in that the calibrating element consists of at least one first pair of coupled strip lines, conductively connected at one end, which are arranged as stub (12, 14) connected at approximately right angles to the strip lines (3, 4) connected to the component (2) on the substrate (1), the other end of the coupled strip lines being connected to one of the strip lines (3, 4) connected to the component.
  2. Calibrating element according to Claim 1, characterised in that the first stuD (12) is designed in such a manner that the inductance generated by it only compensates for the minimum possible parasitic capacitance at the operating frequency.
  3. Calibrating element according to Claim 1, characterised in that a second pair of coupled strip lines (14) is provided as stub, which strip lines are connected in such a manner that a comparatively very large inductance is generated at the operating frequency and the earth capacitance of the calibrating element is minimised and which are arranged on the side of the component (2) opposite to the first stub (12) but on the same surface side of the integrated microwave circuit.
  4. Calibrating element according to Claim 3, characterised in that the respective strip lines are connected through by an additional bonding wire (16) at a particular point of the second stub (14) and thus its effective length is shortened in such a manner that the effective parasitic capacitance occurring at the operating frequency is compensated for.
  5. Calibrating element according to Claim 4, characterised in that first further bonding wires (17...22) are attached to the stub distributed over its length and calibration for the effective parasitic capacitance is carried out in such a manner that the bonding wires (17...22) are cut through from the side of the stub (14) pointing towards the strip lines (3, 4).
  6. Calibrating element according to one of Claims 1 to 5, characterised in that at least one dielectric platelet is arranged on one of the stubs (12, 14) for fine calibration.
EP87107507A 1986-05-27 1987-05-22 Integrated microwave circuit Expired - Lifetime EP0247542B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87107507T ATE79983T1 (en) 1986-05-27 1987-05-22 INTEGRATED MICROWAVE CIRCUIT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3617733 1986-05-27
DE3617733 1986-05-27

Publications (2)

Publication Number Publication Date
EP0247542A1 EP0247542A1 (en) 1987-12-02
EP0247542B1 true EP0247542B1 (en) 1992-08-26

Family

ID=6301698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87107507A Expired - Lifetime EP0247542B1 (en) 1986-05-27 1987-05-22 Integrated microwave circuit

Country Status (4)

Country Link
EP (1) EP0247542B1 (en)
AT (1) ATE79983T1 (en)
DE (1) DE3781326D1 (en)
ES (1) ES2033729T3 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516024A (en) * 1968-12-30 1970-06-02 Texas Instruments Inc Interdigitated strip line coupler
US3768050A (en) * 1971-05-19 1973-10-23 Motorola Inc Microwave integrated circuit
DE2317375B2 (en) * 1973-04-06 1978-01-19 Rohde & Schwarz, 8000 München IN STRIP LINE TECHNOLOGY, IN PARTICULAR THIN FILM TECHNOLOGY, BUILT-UP CIRCUIT WITH INDUCTIVITIES
DE2541569C2 (en) * 1975-09-18 1987-01-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Frequency dependent attenuator
US4001734A (en) * 1975-10-23 1977-01-04 Hughes Aircraft Company π-Loop phase bit apparatus
FR2547116B1 (en) * 1983-05-31 1985-10-25 Thomson Csf METHOD FOR ADJUSTING IN PARTICULAR A FREQUENCY OF A "MICROBAND" ONLINE PRINTED FILTER, AND FILTER OBTAINED BY THIS PROCESS

Also Published As

Publication number Publication date
DE3781326D1 (en) 1992-10-01
ES2033729T3 (en) 1993-04-01
ATE79983T1 (en) 1992-09-15
EP0247542A1 (en) 1987-12-02

Similar Documents

Publication Publication Date Title
DE69411334T2 (en) Stripline resonator
DE3513659A1 (en) DISTRIBUTED POWER AMPLIFIER
DE2424947C2 (en) Traveling wave field effect transistor
DE3332307A1 (en) STABILIZATION CIRCUIT, IN PARTICULAR, AN OSCILLATOR
DE3000898C2 (en) Oscillator with piezoelectric feedback circuit
DE2752333A1 (en) STRIP LINE CAPACITOR
DE69116306T2 (en) Coupling structure for a dielectric filter
DE102016107012A1 (en) Parallel RC circuit equalizer
DE3416107A1 (en) BUS LINE ARRANGEMENT WITH HIGH CAPACITY IN LAYER DESIGN
DE3416786A1 (en) Noise filter
DE3731394C2 (en) High-frequency interference filter for a circuit to be connected to a line, in particular for two-wire sensors
DE19650820C2 (en) Power supply noise elimination method and associated noise elimination circuit
EP0247542B1 (en) Integrated microwave circuit
DE3937183A1 (en) METHOD FOR EMISSION RADIATION DAMPING ON CIRCUIT BOARDS
DE19810620B4 (en) Broadband attenuation device for frequency-compensated attenuation of high-frequency signals in a frequency band
DE4027686A1 (en) INTEGRATED CIRCUIT AND YOUR CONNECTION CIRCUIT
EP0027544B1 (en) Acoustic surface wave component
DE1918356A1 (en) Microwave comb filter
DE2246611C3 (en) Circuit arrangement for suppressing interference on the direct current supply serving strip conductors
DE4227833C2 (en) Intermediate frequency filter for a radio receiver
DE2314418B2 (en) Coilless canonical band filter
DE3248641A1 (en) MICROWAVE RING HYBRID
DE2907472A1 (en) MICROWAVE TUNING DEVICE
DE2751510C2 (en) Variable capacitance capacitor
DE2610407C3 (en) Oscillating circuit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

17P Request for examination filed

Effective date: 19880406

17Q First examination report despatched

Effective date: 19900717

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19920826

Ref country code: NL

Effective date: 19920826

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19920826

Ref country code: BE

Effective date: 19920826

REF Corresponds to:

Ref document number: 79983

Country of ref document: AT

Date of ref document: 19920915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3781326

Country of ref document: DE

Date of ref document: 19921001

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930115

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2033729

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930421

Year of fee payment: 7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931008

Year of fee payment: 7

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940522

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940531

Ref country code: CH

Effective date: 19940531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950420

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19950427

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950720

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960522

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960523

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960522

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19970201

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050522