GB2380309B - Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry - Google Patents

Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry

Info

Publication number
GB2380309B
GB2380309B GB0120278A GB0120278A GB2380309B GB 2380309 B GB2380309 B GB 2380309B GB 0120278 A GB0120278 A GB 0120278A GB 0120278 A GB0120278 A GB 0120278A GB 2380309 B GB2380309 B GB 2380309B
Authority
GB
United Kingdom
Prior art keywords
emi
reduction
electromagnetic interference
magnetic device
audio circuitry
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 - Fee Related
Application number
GB0120278A
Other versions
GB2380309A (en
GB0120278D0 (en
Inventor
Richard Wolfe
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0120278A priority Critical patent/GB2380309B/en
Publication of GB0120278D0 publication Critical patent/GB0120278D0/en
Publication of GB2380309A publication Critical patent/GB2380309A/en
Application granted granted Critical
Publication of GB2380309B publication Critical patent/GB2380309B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1493—Electro-Magnetic Interference [EMI] or Radio Frequency Interference [RFI] shielding; grounding of static charges
GB0120278A 2001-08-20 2001-08-20 Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry Expired - Fee Related GB2380309B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0120278A GB2380309B (en) 2001-08-20 2001-08-20 Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0120278A GB2380309B (en) 2001-08-20 2001-08-20 Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry

Publications (3)

Publication Number Publication Date
GB0120278D0 GB0120278D0 (en) 2001-10-17
GB2380309A GB2380309A (en) 2003-04-02
GB2380309B true GB2380309B (en) 2005-04-06

Family

ID=9920712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0120278A Expired - Fee Related GB2380309B (en) 2001-08-20 2001-08-20 Magnetic device for reduction of electromagnetic interference (EMI) in audio circuitry

Country Status (1)

Country Link
GB (1) GB2380309B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109166844A (en) * 2018-08-28 2019-01-08 安徽星宇生产力促进中心有限公司 A kind of microelectronic core

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2501103A (en) * 2012-04-12 2013-10-16 Mervyn Stanley Curtis Apparatus applying static or varying magnetic fields across electronic equipment

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784945A (en) * 1972-06-28 1974-01-08 M Baermann Permanent magnet for suspension bearings
GB2057194A (en) * 1979-08-03 1981-03-25 Statni Vyzkumny Ustav Material A method of producing a permanent anisotropic magnet
JPS593903A (en) * 1982-06-29 1984-01-10 Akio Nakane Permanent magnet
EP0240420A1 (en) * 1986-03-29 1987-10-07 Shin-Etsu Chemical Co., Ltd. A method for manufacturing a continuous-length extruded bar of plastic magnet with circumferentially multipolar magnetization
US4945330A (en) * 1988-03-28 1990-07-31 Mitsubuishi Kasei Actuator
EP0523002A1 (en) * 1991-07-11 1993-01-13 LAUBE, Hans-Jürgen Compound magnet comprising several individual magnets and a permanent magnetic bearing with a compound magnet comprising several individual magnets
JPH05206676A (en) * 1992-01-27 1993-08-13 Nec Corp Radio wave absorber
WO1994018682A1 (en) * 1993-02-12 1994-08-18 Oxford Instruments (Uk) Limited Permanent magnet
DE19604087A1 (en) * 1996-02-06 1997-08-07 Alfred Ziegenberg Permanent magnetic circuit with oscillating coil arrangement and flow dynamic cooling e.g. for magnetoelectrodynamic coaxial drive systems
FR2747262A1 (en) * 1996-04-04 1997-10-10 Grimaud Jacques Electromagnetic shielding device using magnetic field
GB2371165A (en) * 2001-01-16 2002-07-17 Kh Technology Compact loudspeaker magnet system

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784945A (en) * 1972-06-28 1974-01-08 M Baermann Permanent magnet for suspension bearings
GB2057194A (en) * 1979-08-03 1981-03-25 Statni Vyzkumny Ustav Material A method of producing a permanent anisotropic magnet
JPS593903A (en) * 1982-06-29 1984-01-10 Akio Nakane Permanent magnet
EP0240420A1 (en) * 1986-03-29 1987-10-07 Shin-Etsu Chemical Co., Ltd. A method for manufacturing a continuous-length extruded bar of plastic magnet with circumferentially multipolar magnetization
US4945330A (en) * 1988-03-28 1990-07-31 Mitsubuishi Kasei Actuator
EP0523002A1 (en) * 1991-07-11 1993-01-13 LAUBE, Hans-Jürgen Compound magnet comprising several individual magnets and a permanent magnetic bearing with a compound magnet comprising several individual magnets
JPH05206676A (en) * 1992-01-27 1993-08-13 Nec Corp Radio wave absorber
WO1994018682A1 (en) * 1993-02-12 1994-08-18 Oxford Instruments (Uk) Limited Permanent magnet
DE19604087A1 (en) * 1996-02-06 1997-08-07 Alfred Ziegenberg Permanent magnetic circuit with oscillating coil arrangement and flow dynamic cooling e.g. for magnetoelectrodynamic coaxial drive systems
FR2747262A1 (en) * 1996-04-04 1997-10-10 Grimaud Jacques Electromagnetic shielding device using magnetic field
GB2371165A (en) * 2001-01-16 2002-07-17 Kh Technology Compact loudspeaker magnet system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109166844A (en) * 2018-08-28 2019-01-08 安徽星宇生产力促进中心有限公司 A kind of microelectronic core

Also Published As

Publication number Publication date
GB2380309A (en) 2003-04-02
GB0120278D0 (en) 2001-10-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090820