GB1236687A - Double-tuned intermediate-frequency transformer - Google Patents

Double-tuned intermediate-frequency transformer

Info

Publication number
GB1236687A
GB1236687A GB08015/69A GB1801569A GB1236687A GB 1236687 A GB1236687 A GB 1236687A GB 08015/69 A GB08015/69 A GB 08015/69A GB 1801569 A GB1801569 A GB 1801569A GB 1236687 A GB1236687 A GB 1236687A
Authority
GB
United Kingdom
Prior art keywords
core
double
frequency transformer
tuned
inductor
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
GB08015/69A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1236687A publication Critical patent/GB1236687A/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
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • H03H7/0169—Intermediate frequency filters
    • H03H7/0184—Intermediate frequency filters with ferromagnetic core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • 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)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

1,236,687. Transformers. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. 8 April, 1969 [18 April, 1968], No. 18015/69. Heading HIT. In a double-tuned intermediate-frequency transformer, two single-tuned inductors having cap-type cores 12 with centre members 11 are disposed adjacent each other and covered with one shielding case 17. The degree of magnetic coupling between the coils 3, 3 depends on the relative lengths of the sleeve (12<SP>1</SP>) and centre 11 portions of the cores 12 (Fig. 3, not shown). Each inductor has a core supporter 5 (e.g. of thermoplastic resin) with prongs 9 which are heated and deformed into holes (13, Fig. 2, not shown) in the core 12 and a shank 6 which is self-threading is secured into a threaded hole 2 in the terminal base member of the inductor. A window 20 and a slot 14 in the core enable the degree of magnetic coupling (and hence the pass band width of the device) to be adjusted. Capacitors 18 are connected across the coils, and terminals 15 and slots (16, Fig. 2, not shown) for lead wires are provided on the terminal base member.
GB08015/69A 1968-04-18 1969-04-08 Double-tuned intermediate-frequency transformer Expired GB1236687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3263168 1968-04-18

Publications (1)

Publication Number Publication Date
GB1236687A true GB1236687A (en) 1971-06-23

Family

ID=12364184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08015/69A Expired GB1236687A (en) 1968-04-18 1969-04-08 Double-tuned intermediate-frequency transformer

Country Status (4)

Country Link
US (1) US3593245A (en)
DE (1) DE1919808B2 (en)
FR (1) FR2006414A1 (en)
GB (1) GB1236687A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558295A (en) * 1982-11-05 1985-12-10 Spang & Company Tunable-inductance magnetically-soft ferrite core structures
US4999743A (en) * 1989-09-27 1991-03-12 At&T Bell Laboratories Transformer with included current sensing element
GB9304522D0 (en) * 1993-03-05 1993-04-21 Lucas Ind Plc Differential transformer arrangement

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1634923A (en) * 1924-07-15 1927-07-05 J C Thullen Transformer
US1978600A (en) * 1933-07-08 1934-10-30 Johnson Lab Inc Permeability-tuned resonant circuit
US2318415A (en) * 1939-07-31 1943-05-04 Gen Electric High-frequency iron core
US2438770A (en) * 1943-06-05 1948-03-30 Gen Electric Adjustable mutual coupling
US2388295A (en) * 1943-07-02 1945-11-06 Gen Electric Mutual coupling
GB580782A (en) * 1943-07-21 1946-09-19 British Thomson Houston Co Ltd Improvements in radio frequency transformers
US2435630A (en) * 1945-06-02 1948-02-10 Automatic Mfg Corp Tuned transformer assembly
US2483919A (en) * 1948-05-29 1949-10-04 Automatic Mfg Corp Coil and condenser assembly
GB744234A (en) * 1950-12-16 1956-02-01 Kurt Kaschke Dust-core for the coils of electrical communication circuits
US2837726A (en) * 1953-07-01 1958-06-03 Pearlman William Reluctance tuned radio frequency coil
US2823359A (en) * 1954-06-01 1958-02-11 Rca Corp Miniature intermediate-frequency transformer
US3155895A (en) * 1960-04-20 1964-11-03 Adams Electronics Inc Coil assembly with threaded stem core

Also Published As

Publication number Publication date
DE1919808B2 (en) 1971-10-14
FR2006414A1 (en) 1969-12-26
DE1919808A1 (en) 1969-10-23
US3593245A (en) 1971-07-13

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