GB740465A - Improvements in or relating to electric wave filters - Google Patents

Improvements in or relating to electric wave filters

Info

Publication number
GB740465A
GB740465A GB95453A GB95453A GB740465A GB 740465 A GB740465 A GB 740465A GB 95453 A GB95453 A GB 95453A GB 95453 A GB95453 A GB 95453A GB 740465 A GB740465 A GB 740465A
Authority
GB
United Kingdom
Prior art keywords
network
filter
substitution
self
resonant circuit
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
GB95453A
Inventor
Charles Francis Campbell
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 GB95453A priority Critical patent/GB740465A/en
Publication of GB740465A publication Critical patent/GB740465A/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
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Filters And Equalizers (AREA)

Abstract

740,465. Impedance networks. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Dec. 30, 1953 [Jan. 13, 1953], No. 954/53. Drawings to Specification. Class 40 (8). A method of compensating for the difference between the theoretical and actual transfer characteristics of a filter or like 4-pole network due to self-capacitance of the inductive elements, consists in substituting a series resonant circuit for each capacitative element in the ideal form of the network, the additional inductor required to complete such resonant circuit being so chosen as to contribute an effect upon the transfer characteristics of the filter which differs from that contributed by the original capacitative element by an amount substantially equal and opposite to the effect of the self-capacitance over the range of frequencies to be passed by the filter. The transformation can be expressed as a substitution of the expression Ap/p<SP>2</SP> + B for p (= J#) in the formulae used in the calculation of the network. By suitable choice of the constants A and B it can be arranged that the characteristics of the resultant network differ only slightly from those of the original theoretical network. The substitution is also valid for additional sections included for line impedance matching.
GB95453A 1953-01-13 1953-01-13 Improvements in or relating to electric wave filters Expired GB740465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB95453A GB740465A (en) 1953-01-13 1953-01-13 Improvements in or relating to electric wave filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB95453A GB740465A (en) 1953-01-13 1953-01-13 Improvements in or relating to electric wave filters

Publications (1)

Publication Number Publication Date
GB740465A true GB740465A (en) 1955-11-16

Family

ID=9713424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB95453A Expired GB740465A (en) 1953-01-13 1953-01-13 Improvements in or relating to electric wave filters

Country Status (1)

Country Link
GB (1) GB740465A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982928A (en) * 1958-04-29 1961-05-02 Albert R Kall Electric filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2982928A (en) * 1958-04-29 1961-05-02 Albert R Kall Electric filter

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