GB534107A - Improvements in or relating to filter networks - Google Patents

Improvements in or relating to filter networks

Info

Publication number
GB534107A
GB534107A GB32670/39A GB3267039A GB534107A GB 534107 A GB534107 A GB 534107A GB 32670/39 A GB32670/39 A GB 32670/39A GB 3267039 A GB3267039 A GB 3267039A GB 534107 A GB534107 A GB 534107A
Authority
GB
United Kingdom
Prior art keywords
series
shunt
derived
terminated
mid
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
GB32670/39A
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB32670/39A priority Critical patent/GB534107A/en
Priority to US366467A priority patent/US2260494A/en
Publication of GB534107A publication Critical patent/GB534107A/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
    • H03H7/17—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
    • H03H7/075—Ladder networks, e.g. electric wave 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
    • H03H7/1741—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
    • H03H7/01—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
    • H03H7/1766—Parallel 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
    • H03H7/1783—Combined 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
    • H03H7/1791—Combined LC in shunt or branch path

Abstract

534,107. Impedance networks. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and TERRONI, T. B. D. Dec. 21, 1939, No. 32670. [Class 40 (iii)] A constant-resistance network is formed by connecting in parallel, Fig. 5, or in series, Fig. 7 (not shown), two circuits comprising equal resistances R1, R2 in series with inverse filters Z KS , 7 KSH of ladder type which are respectivel) mid-series terminated and mid-shunt terminated. One of the two filters serves as a balancing network, and sufficiently good results are obtained by using a single section or a halfsection for this filter, and preferably also for the inverse filter. In practical examples, Figs. 8, 9 (not shown), in which the circuits are in series, the filters are respectively of series-derived and shunt-derived m-type, and in a particular arrangement, Fig. 10, which is advantageous for good matching the balancing filter comprises a midseries terminated half-section of shunt-derived type having m = 0.6, while the inverse filter is series-derived and is terminated in mid-shunt at the output terminals E, F.
GB32670/39A 1939-12-21 1939-12-21 Improvements in or relating to filter networks Expired GB534107A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB32670/39A GB534107A (en) 1939-12-21 1939-12-21 Improvements in or relating to filter networks
US366467A US2260494A (en) 1939-12-21 1940-11-20 Electrical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32670/39A GB534107A (en) 1939-12-21 1939-12-21 Improvements in or relating to filter networks

Publications (1)

Publication Number Publication Date
GB534107A true GB534107A (en) 1941-02-27

Family

ID=10342241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32670/39A Expired GB534107A (en) 1939-12-21 1939-12-21 Improvements in or relating to filter networks

Country Status (2)

Country Link
US (1) US2260494A (en)
GB (1) GB534107A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5864185A (en) * 1996-03-28 1999-01-26 General Electric Company Sub-synchronous resonance filters for series capacitors
US8487717B2 (en) * 2010-02-01 2013-07-16 Ppc Broadband, Inc. Multipath mitigation circuit for home network

Also Published As

Publication number Publication date
US2260494A (en) 1941-10-28

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