GB535529A - Improvements in or relating to electric wave filters - Google Patents

Improvements in or relating to electric wave filters

Info

Publication number
GB535529A
GB535529A GB623740A GB623740A GB535529A GB 535529 A GB535529 A GB 535529A GB 623740 A GB623740 A GB 623740A GB 623740 A GB623740 A GB 623740A GB 535529 A GB535529 A GB 535529A
Authority
GB
United Kingdom
Prior art keywords
sections
pass
minimum attenuation
given
band
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
GB623740A
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.)
JOACHIM GRABAU
Automatic Telephone and Electric Co Ltd
Original Assignee
JOACHIM GRABAU
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 JOACHIM GRABAU, Automatic Telephone and Electric Co Ltd filed Critical JOACHIM GRABAU
Priority to GB623740A priority Critical patent/GB535529A/en
Publication of GB535529A publication Critical patent/GB535529A/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
    • H03H7/1766—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
    • H03H7/0115—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)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

535,529. Impedance networks. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and GRABAU, J. April 6, 1940, No. 6237. Drawings to Specification. [Class 40 (iii)] A multi-section ladder filter having given cut-off frequency or frequencies and given characteristic impedance can be designed so that, for a specified number of sections, the minimum attenuation in the stop range is the highest possible or, if the minimum attenuation in the stop range is specified, it can be designed to have the least possible number of sections. These problems are capable of rigid solution by means of known formulae which are given in the Specification (see, for example, H. Piloty in Elektrische Nachrichten-Technik, March, 1937). Such filters however comprise only m-type sections, and the invention consists in making one of the sections of constant-k configuration, thus saving one element at the expense of a trifling reduction of the minimum attenuation value referred to above. The Specification indicates the modifications of the formulae necessitated by the additional condition as applied to the design of low-pass, high-pass, band-pass and band-elimination filters. Simple examples are shown in which the m-sections are shunt-derived.
GB623740A 1940-04-06 1940-04-06 Improvements in or relating to electric wave filters Expired GB535529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB623740A GB535529A (en) 1940-04-06 1940-04-06 Improvements in or relating to electric wave filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB623740A GB535529A (en) 1940-04-06 1940-04-06 Improvements in or relating to electric wave filters

Publications (1)

Publication Number Publication Date
GB535529A true GB535529A (en) 1941-04-11

Family

ID=9810894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB623740A Expired GB535529A (en) 1940-04-06 1940-04-06 Improvements in or relating to electric wave filters

Country Status (1)

Country Link
GB (1) GB535529A (en)

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