DK169648B1 - Båndpasfilterkredsløb - Google Patents

Båndpasfilterkredsløb Download PDF

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Publication number
DK169648B1
DK169648B1 DK654788A DK654788A DK169648B1 DK 169648 B1 DK169648 B1 DK 169648B1 DK 654788 A DK654788 A DK 654788A DK 654788 A DK654788 A DK 654788A DK 169648 B1 DK169648 B1 DK 169648B1
Authority
DK
Denmark
Prior art keywords
capacitor
capacitors
variable
diodes
series
Prior art date
Application number
DK654788A
Other languages
Danish (da)
English (en)
Other versions
DK654788D0 (da
DK654788A (da
Inventor
John David Speake
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of DK654788D0 publication Critical patent/DK654788D0/da
Publication of DK654788A publication Critical patent/DK654788A/da
Application granted granted Critical
Publication of DK169648B1 publication Critical patent/DK169648B1/da

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
    • H03H7/01—Frequency selective two-port 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
    • H03H7/01—Frequency selective two-port networks
    • H03H7/17—Structural details of sub-circuits of frequency selective networks
    • H03H7/1741—Comprising typical LC combinations, irrespective of presence and location of additional resistors
    • H03H7/1775—Parallel LC in shunt or branch path
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/02—Details
    • H03J3/16—Tuning without displacement of reactive element, e.g. by varying permeability
    • H03J3/18—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance
    • H03J3/185—Tuning without displacement of reactive element, e.g. by varying permeability by discharge tube or semiconductor device simulating variable reactance with varactors, i.e. voltage variable reactive diodes

Landscapes

  • Filters And Equalizers (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
DK654788A 1987-11-27 1988-11-24 Båndpasfilterkredsløb DK169648B1 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8727831A GB2213004A (en) 1987-11-27 1987-11-27 Bandpass filter circuit arrangement
GB8727831 1987-11-27

Publications (3)

Publication Number Publication Date
DK654788D0 DK654788D0 (da) 1988-11-24
DK654788A DK654788A (da) 1989-05-28
DK169648B1 true DK169648B1 (da) 1995-01-02

Family

ID=10627647

Family Applications (1)

Application Number Title Priority Date Filing Date
DK654788A DK169648B1 (da) 1987-11-27 1988-11-24 Båndpasfilterkredsløb

Country Status (6)

Country Link
US (1) US4839617A (fr)
EP (1) EP0318118B1 (fr)
JP (1) JP2755630B2 (fr)
DE (1) DE3850053T2 (fr)
DK (1) DK169648B1 (fr)
GB (1) GB2213004A (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2213005A (en) * 1987-11-27 1989-08-02 Philips Electronic Associated Bandpass filter circuit arrangement
AU638461B2 (en) * 1989-07-07 1993-07-01 Philips Electronics Australia Limited A filter
EP0406962A3 (en) * 1989-07-07 1991-04-17 N.V. Philips' Gloeilampenfabrieken A filter
GB2247125B (en) * 1990-08-16 1995-01-11 Technophone Ltd Tunable bandpass filter
US5107233A (en) * 1990-10-15 1992-04-21 Hewlett-Packard Company Amplitude correction of field coupled varactor tuned filters
FR2688955B1 (fr) * 1992-03-17 1996-11-15 Thomson Csf Filtre accordable haute frequence.
US5392011A (en) * 1992-11-20 1995-02-21 Motorola, Inc. Tunable filter having capacitively coupled tuning elements
US5379008A (en) * 1993-03-03 1995-01-03 Motorola, Inc. Variable impedance circuit providing reduced distortion
US5574413A (en) * 1995-03-02 1996-11-12 Motorola, Inc. Tunable filter having a capacitive circuit connected to ground
US5752179A (en) * 1995-08-17 1998-05-12 Zenith Electronics Corporation Selective RF circuit with varactor tuned and switched bandpass filters
DE69632040T2 (de) * 1996-01-10 2004-09-30 Koninklijke Philips Electronics N.V. Tv/fm-empfänger für multimedia-anwendungen
US5917387A (en) * 1996-09-27 1999-06-29 Lucent Technologies Inc. Filter having tunable center frequency and/or tunable bandwidth
US6100757A (en) * 1998-09-30 2000-08-08 Motorola, Inc. Variable time delay network method and apparatus therof
JP3734642B2 (ja) * 1999-05-25 2006-01-11 パイオニア株式会社 入力トラップ回路及びイメージトラップ回路
JP4734659B2 (ja) * 2005-09-05 2011-07-27 国立大学法人電気通信大学 分波回路及びその設計方法
RU186032U1 (ru) * 2018-07-23 2018-12-26 Акционерное общество "Омский научно-исследовательский институт приборостроения" (АО "ОНИИП") Полосовой перестраиваемый фильтр

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997672A (en) * 1956-05-17 1961-08-22 Glenn M Reinsmith Coupling of resonant circuitry
DE1919625B2 (de) * 1969-04-22 1977-01-20 Philips Patentverwaltung Gmbh, 2000 Hamburg Empfaenger-eingangsschaltung, insbesondere fuer mittelwelle
GB1295850A (fr) * 1969-12-24 1972-11-08
US3624514A (en) * 1970-01-09 1971-11-30 Philips Corp Tuning circuit having common tuning element for three frequency ranges and self-oscillating mixer using same
US4316108A (en) * 1979-09-25 1982-02-16 Rogers Jr Walter M Tracking filter for FM threshold extension
FR2555847B1 (fr) * 1983-11-25 1987-03-20 Radiotechnique Filtre de preselection de canaux, notamment pour recepteur de television operant dans une bande etendue de frequences
US4703292A (en) * 1985-03-04 1987-10-27 Sony Corporation Tuning circuit apparatus

Also Published As

Publication number Publication date
DE3850053D1 (de) 1994-07-14
EP0318118B1 (fr) 1994-06-08
JPH01232814A (ja) 1989-09-18
EP0318118A3 (fr) 1991-03-13
JP2755630B2 (ja) 1998-05-20
DK654788D0 (da) 1988-11-24
GB8727831D0 (en) 1987-12-31
DK654788A (da) 1989-05-28
GB2213004A (en) 1989-08-02
EP0318118A2 (fr) 1989-05-31
US4839617A (en) 1989-06-13
DE3850053T2 (de) 1994-12-22

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed