GB1022306A - Improvements in or relating to bandpass filters - Google Patents

Improvements in or relating to bandpass filters

Info

Publication number
GB1022306A
GB1022306A GB51137/63A GB5113763A GB1022306A GB 1022306 A GB1022306 A GB 1022306A GB 51137/63 A GB51137/63 A GB 51137/63A GB 5113763 A GB5113763 A GB 5113763A GB 1022306 A GB1022306 A GB 1022306A
Authority
GB
United Kingdom
Prior art keywords
band
capacitor
branch
signal
comparatively
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
GB51137/63A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1022306A publication Critical patent/GB1022306A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/4446—IF amplifier circuits specially adapted for B&W TV
    • 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
    • H03H7/06—Frequency selective two-port networks including resistors
    • 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
    • H03H7/175—Series LC in series path
    • 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
    • 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
    • H03H7/46—Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Filters And Equalizers (AREA)
  • Television Receiver Circuits (AREA)
  • Amplifiers (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

1,022,306. Electrical filter networks; multiplex radio signalling. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Dec. 30, 1963 [Jan. 2, 1963], No. 51137/63. Headings H3U and H4L. A band-pass filter for passing a comparatively wide frequency range and also for suppressing a comparatively narrow frequency band adjacent to said wide range, comprises series branches I, II, each constituted by a seriesresonant circuit tuned to the mid-point of the wide range and a shunt branch comprising individual branches III, IV each comprising series-resonant circuits tuned to the narrow band, the branch IV being coupled across capacitor 35 forming part of branch III. The input signal which may bea television intermediate-frequency signal is applied to input terminals on the left and the output signal from which signals, e.g. sound carrier, within the comparatively narrow band have been suppressed appears across capacitor 21 which may be the input capacitance of a vision intermediate frequency amplifier valve, Fig. 3 (not shown). The corresponding sound carrier signal, i.e. the comparatively narrow frequency band, is developed across capacitor 41 which may be the input capacitance of the sound I.F. amplifier. To obtain the band-pass characteristics inductors 13, 23 and 33, 43 may be inductively coupled though this is not essential and in the preferred embodiment inductive coupling is not used. Resistor 40 serves as a neutralizing component to reduce the sharpness of the narrow frequency band.
GB51137/63A 1963-01-02 1963-12-30 Improvements in or relating to bandpass filters Expired GB1022306A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR920307A FR1352223A (en) 1963-01-02 1963-01-02 Four tuned circuit band filter, especially for television

Publications (1)

Publication Number Publication Date
GB1022306A true GB1022306A (en) 1966-03-09

Family

ID=8793947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51137/63A Expired GB1022306A (en) 1963-01-02 1963-12-30 Improvements in or relating to bandpass filters

Country Status (9)

Country Link
US (1) US3358246A (en)
AT (1) AT241556B (en)
CH (1) CH416864A (en)
ES (1) ES294961A3 (en)
FR (1) FR1352223A (en)
GB (1) GB1022306A (en)
NL (1) NL301922A (en)
OA (1) OA00791A (en)
SE (1) SE307995B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470480A2 (en) * 1990-08-06 1992-02-12 Thomson Consumer Electronics, Inc. FM trap for a television tuner permitting both TV and FM reception through the same tuner

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3452303A (en) * 1965-07-20 1969-06-24 Warwick Electronics Inc Bandpass network having a high attenuation rejection characteristic
US3680011A (en) * 1970-08-03 1972-07-25 Stanford Research Inst Loss cancelling resonator and filters
US3778720A (en) * 1972-03-08 1973-12-11 Stewart Warner Corp Intermediate frequency amplifier circuit
US3906350A (en) * 1973-03-12 1975-09-16 Comark Ind Inc Nyquist slope filter useful for monitoring video modulation at transmitting station
JPS5515885B2 (en) * 1974-02-25 1980-04-26
US4283741A (en) * 1979-10-26 1981-08-11 Rca Corporation Signal separation networks
AU539824B2 (en) * 1979-10-26 1984-10-18 Rca Corp. Intercarrier sound/video signal separator
US4376953A (en) * 1979-10-26 1983-03-15 Naimpally Saiprasad V Signal separation networks
JP3101832U (en) * 2003-11-21 2004-06-24 アルプス電気株式会社 Intermediate frequency circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2707730A (en) * 1951-05-21 1955-05-03 Rca Corp Amplifier circuits for television picture signal channels
US3188566A (en) * 1962-10-08 1965-06-08 Collins Radio Co Intermodulation measurement system including resonant filter trap means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470480A2 (en) * 1990-08-06 1992-02-12 Thomson Consumer Electronics, Inc. FM trap for a television tuner permitting both TV and FM reception through the same tuner
EP0470480A3 (en) * 1990-08-06 1992-10-14 Thomson Consumer Electronics, Inc. Fm trap for a television tuner permitting both tv and fm reception through the same tuner

Also Published As

Publication number Publication date
US3358246A (en) 1967-12-12
CH416864A (en) 1966-07-15
FR1352223A (en) 1964-02-14
ES294961A3 (en) 1963-10-16
SE307995B (en) 1969-01-27
OA00791A (en) 1967-11-15
NL301922A (en) 1965-10-11
AT241556B (en) 1965-07-26

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