GB783549A - Improvements in and relating to adjustable printed circuit inductances - Google Patents

Improvements in and relating to adjustable printed circuit inductances

Info

Publication number
GB783549A
GB783549A GB68055A GB68055A GB783549A GB 783549 A GB783549 A GB 783549A GB 68055 A GB68055 A GB 68055A GB 68055 A GB68055 A GB 68055A GB 783549 A GB783549 A GB 783549A
Authority
GB
United Kingdom
Prior art keywords
inductance
spirals
bar
printed circuit
magnetic material
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
GB68055A
Inventor
Mark Grenly
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.)
NEOSID Ltd
Original Assignee
NEOSID 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 NEOSID Ltd filed Critical NEOSID Ltd
Priority to GB68055A priority Critical patent/GB783549A/en
Publication of GB783549A publication Critical patent/GB783549A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances

Abstract

783,549. Inductors. NEOSID, Ltd. April 6, 1956 [Jan. 10. 1955], No. 680/55. Class 38 (2). A printed circuit inductor comprises two spiral conducting parts a connected together and means b movable across the spirals to vary their mutual coupling and hence the value of the inductance. As shown, the means b comprises a pivoted bar of soft magnetic material providing a cyclic variation of inductance on rotation. The bar may be screwmounted so as also to slowly increase the inductance on approach, or it may be replaced by a screw-mounted disc. Alternatively the bar or disc may be made of conducting non-magnetic material thereby decreasing the inductance on approach due to eddy current shielding of the flux paths. The spirals may be connected directly or through a capacitance and may be wound in the same or opposite senses. They may also be on opposite sides of an insulating sheet either in coaxial or staggered disposition and may be of different size and configuration and have variable pitch. The spirals may also be printed on two sheets (or one thick sheet having a coplanar slot) so that the coupling means may be passed between them.
GB68055A 1955-01-10 1955-01-10 Improvements in and relating to adjustable printed circuit inductances Expired GB783549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB68055A GB783549A (en) 1955-01-10 1955-01-10 Improvements in and relating to adjustable printed circuit inductances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB68055A GB783549A (en) 1955-01-10 1955-01-10 Improvements in and relating to adjustable printed circuit inductances

Publications (1)

Publication Number Publication Date
GB783549A true GB783549A (en) 1957-09-25

Family

ID=9708650

Family Applications (1)

Application Number Title Priority Date Filing Date
GB68055A Expired GB783549A (en) 1955-01-10 1955-01-10 Improvements in and relating to adjustable printed circuit inductances

Country Status (1)

Country Link
GB (1) GB783549A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641429A (en) * 1969-12-24 1972-02-08 Massachusetts Inst Technology Position-measuring transducer comprising a stator and relatively movable flux-altering member
US3976019A (en) * 1974-10-30 1976-08-24 The Singer Company Position sensing device for sewing instrumentality actuator
US4777436A (en) * 1985-02-11 1988-10-11 Sensor Technologies, Inc. Inductance coil sensor
DE3942509A1 (en) * 1989-12-22 1991-06-27 Hirschmann Richard Gmbh Co HF circuit with tunable printed coil - having inductance varied by moving relative position of ferrite element i.e. by distance or amt. of coverage
DE19854234C1 (en) * 1998-11-24 2000-06-21 Bosch Gmbh Robert Inductive component with a planar line structure and method for producing the same
EP1069576A1 (en) 1999-07-16 2001-01-17 Lucent Technologies Inc. Article comprising a variable inductor
EP1484773A1 (en) * 2003-06-06 2004-12-08 M/A-Com Eurotec B.V. Increasing performance of planar inductors used in broadband applications
US7259639B2 (en) 2002-03-29 2007-08-21 M/A-Com Eurotec, B.V. Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof
WO2014182444A1 (en) * 2013-05-06 2014-11-13 Qualcomm Incorporated Inductor tunable by a variable magnetic flux density component

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641429A (en) * 1969-12-24 1972-02-08 Massachusetts Inst Technology Position-measuring transducer comprising a stator and relatively movable flux-altering member
US3976019A (en) * 1974-10-30 1976-08-24 The Singer Company Position sensing device for sewing instrumentality actuator
US4777436A (en) * 1985-02-11 1988-10-11 Sensor Technologies, Inc. Inductance coil sensor
DE3942509A1 (en) * 1989-12-22 1991-06-27 Hirschmann Richard Gmbh Co HF circuit with tunable printed coil - having inductance varied by moving relative position of ferrite element i.e. by distance or amt. of coverage
DE19854234C1 (en) * 1998-11-24 2000-06-21 Bosch Gmbh Robert Inductive component with a planar line structure and method for producing the same
EP1069576A1 (en) 1999-07-16 2001-01-17 Lucent Technologies Inc. Article comprising a variable inductor
US7259639B2 (en) 2002-03-29 2007-08-21 M/A-Com Eurotec, B.V. Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof
US7126443B2 (en) 2003-03-28 2006-10-24 M/A-Com, Eurotec, B.V. Increasing performance of planar inductors used in broadband applications
EP1484773A1 (en) * 2003-06-06 2004-12-08 M/A-Com Eurotec B.V. Increasing performance of planar inductors used in broadband applications
WO2014182444A1 (en) * 2013-05-06 2014-11-13 Qualcomm Incorporated Inductor tunable by a variable magnetic flux density component

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