GB1271441A - Improvements relating to band pass filters - Google Patents

Improvements relating to band pass filters

Info

Publication number
GB1271441A
GB1271441A GB2177369A GB2177369A GB1271441A GB 1271441 A GB1271441 A GB 1271441A GB 2177369 A GB2177369 A GB 2177369A GB 2177369 A GB2177369 A GB 2177369A GB 1271441 A GB1271441 A GB 1271441A
Authority
GB
United Kingdom
Prior art keywords
couplings
band
earthy
april
live
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
GB2177369A
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.)
Telefunken Patentverwertungs GmbH
Original Assignee
Telefunken Patentverwertungs GmbH
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
Priority claimed from DE19681766289 external-priority patent/DE1766289C3/en
Application filed by Telefunken Patentverwertungs GmbH filed Critical Telefunken Patentverwertungs GmbH
Publication of GB1271441A publication Critical patent/GB1271441A/en
Expired legal-status Critical Current

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
    • H03H7/0123—Frequency selective two-port networks comprising distributed impedance elements together with lumped impedance elements
    • 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
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • 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
    • H03H7/1716—Comprising foot-point elements
    • H03H7/1733—Element between different shunt or branch paths
    • 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
    • H03H7/1758—Series LC in shunt or branch path

Landscapes

  • Filters And Equalizers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1,271,441. Band-pass filter circuits. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 29 April, 1969 [30 April, 1968], No. 21773/69. Heading H1W. The cavities of a twin-cavity U.H.F. bandpass filter are coupled reactively at both "live" and "earthy" ends, the variations of the couplings with frequency being such as to preserve the shape of band-pass response throughout the tuning range. The filters shown are of the half-wave type having inner conductors 5, 6 terminated by lumped inductances 9, 10 and tuning capacitances 7, 8 which may be in the form of varactor diodes (see Fig. 3). The "live" end coupling shown in Fig. 2 is capacitative and that shown in Fig. 3 inductive, the "earthy" end couplings being respectively a # circuit including a series resonant series branch 13, 14 and a T circuit including a parallel resonant shunt branch 19, 24. Thus, in both cases, the tuned circuits have couplings of opposite sign at their ends.
GB2177369A 1968-04-30 1969-04-29 Improvements relating to band pass filters Expired GB1271441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681766289 DE1766289C3 (en) 1968-04-30 Tunable pi-circle or lambda / 2 band filter

Publications (1)

Publication Number Publication Date
GB1271441A true GB1271441A (en) 1972-04-19

Family

ID=5698863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2177369A Expired GB1271441A (en) 1968-04-30 1969-04-29 Improvements relating to band pass filters

Country Status (1)

Country Link
GB (1) GB1271441A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541560A (en) * 1993-03-03 1996-07-30 Lk-Products Oy Selectable bandstop/bandpass filter with switches selecting the resonator coupling
WO2009070628A1 (en) * 2007-11-27 2009-06-04 Qualcomm Incorporated Methods and apparatuses for inductor tuning in radio frequency integrated circuits
EP2433361B1 (en) * 2009-05-20 2014-04-30 Unitron Tv signal distribution filter having planar inductors

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5541560A (en) * 1993-03-03 1996-07-30 Lk-Products Oy Selectable bandstop/bandpass filter with switches selecting the resonator coupling
WO2009070628A1 (en) * 2007-11-27 2009-06-04 Qualcomm Incorporated Methods and apparatuses for inductor tuning in radio frequency integrated circuits
CN101874347A (en) * 2007-11-27 2010-10-27 高通股份有限公司 Methods and apparatuses for inductor tuning in radio frequency integrated circuits
US8405467B2 (en) 2007-11-27 2013-03-26 Qualcomm Incorporated Methods and apparatuses for inductor tuning in radio frequency integrated circuits
CN101874347B (en) * 2007-11-27 2014-05-07 高通股份有限公司 Methods and apparatuses for inductor tuning in radio frequency integrated circuits
EP2433361B1 (en) * 2009-05-20 2014-04-30 Unitron Tv signal distribution filter having planar inductors

Also Published As

Publication number Publication date
DE1766289A1 (en) 1971-06-24
DE1766289B2 (en) 1972-10-05

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