GB624292A - Improvements in wave filters - Google Patents

Improvements in wave filters

Info

Publication number
GB624292A
GB624292A GB17026/47A GB1702647A GB624292A GB 624292 A GB624292 A GB 624292A GB 17026/47 A GB17026/47 A GB 17026/47A GB 1702647 A GB1702647 A GB 1702647A GB 624292 A GB624292 A GB 624292A
Authority
GB
United Kingdom
Prior art keywords
june
impedances
electric
wave filters
impedance
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
GB17026/47A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB624292A publication Critical patent/GB624292A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/0023—Balance-unbalance or balance-balance networks
    • H03H9/0095—Balance-unbalance or balance-balance networks using bulk acoustic wave devices
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B15/00—Drawing glass upwardly from the melt
    • C03B15/02—Drawing glass sheets
    • C03B15/08—Drawing glass sheets by means of bars below the surface of the melt
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezo-electric or electrostrictive material
    • H03H9/542—Filters comprising resonators of piezo-electric or electrostrictive material including passive elements

Abstract

624,292. Impedance networks. WESTERN ELECTRIC. CO., Inc. June 27, 1947, No. 17026. Convention date, June 10, 1942. [Class 40 (viii)] A wave filter comprises a lattice network composed of four piezo-electric impedances 1, 2, 3 and 4 with a differential capacitor 11 providing two variable capacitances, one of which increases when the other decreases, these being associated respectively with two impedance branches which are adjacent to each other. In the construction shown, plates 12 and 13 are connected to impedances 1 and 4 and a movable plate 14 is connected to their junction. Variable condensers 9 and 10 and inductors 15, 16, 17 and 18 may be provided to adjust the band width. U.S.A. Specification 2,045,991 is referred to.
GB17026/47A 1942-06-10 1947-06-27 Improvements in wave filters Expired GB624292A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US446479A US2342875A (en) 1942-06-10 1942-06-10 Wave filter

Publications (1)

Publication Number Publication Date
GB624292A true GB624292A (en) 1949-06-01

Family

ID=23772747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17026/47A Expired GB624292A (en) 1942-06-10 1947-06-27 Improvements in wave filters

Country Status (6)

Country Link
US (1) US2342875A (en)
BE (1) BE473973A (en)
CH (1) CH265654A (en)
FR (1) FR948264A (en)
GB (1) GB624292A (en)
NL (2) NL83190C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2452114A (en) * 1945-04-26 1948-10-26 Bell Telephone Labor Inc Balanced wave filter
DE1252330B (en) * 1958-09-17
US5499002A (en) * 1994-04-28 1996-03-12 Kinsman; Robert G. Resonator filter utilizing cascaded impedance inverters

Also Published As

Publication number Publication date
BE473973A (en)
US2342875A (en) 1944-02-29
FR948264A (en) 1949-07-27
NL83190C (en)
NL134514B (en)
CH265654A (en) 1949-12-15

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