EP0435304A3 - Acoustic apparatus and driving apparatus constituting the same - Google Patents

Acoustic apparatus and driving apparatus constituting the same Download PDF

Info

Publication number: EP0435304A3
Authority: EP; European Patent Office
Prior art keywords: same; acoustic; constituting; driving; driving apparatus
Prior art date: 1989-12-26
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.): Granted

Application number

EP19900125621

Other versions

EP0435304B1 (en

EP0435304A2 (en

Inventor

Kenji C/O Yamaha Corporation Yokoyama

Masao C/O Yamaha Corporation Noro

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.)

Yamaha Corp

Original Assignee

Yamaha Corp

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.)

1989-12-26

Filing date

1990-12-27

Publication date

1991-10-23

1990-12-27 Application filed by Yamaha Corp filed Critical Yamaha Corp

1991-07-03 Publication of EP0435304A2 publication Critical patent/EP0435304A2/en

1991-10-23 Publication of EP0435304A3 publication Critical patent/EP0435304A3/en

1998-07-29 Application granted granted Critical

1998-07-29 Publication of EP0435304B1 publication Critical patent/EP0435304B1/en

2010-12-27 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

EP19900125621 1989-12-26 1990-12-27 Acoustic apparatus and driving apparatus constituting the same Expired - Lifetime EP0435304B1 (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP33521089A JP3035943B2 (en)	1989-12-26	1989-12-26	AUDIO DEVICE AND DRIVE DEVICE FOR COMPOSING SUCH AUDIO DEVICE
JP335210/89		1989-12-26

Publications (3)

Publication Number	Publication Date
EP0435304A2 EP0435304A2 (en)	1991-07-03
EP0435304A3 true EP0435304A3 (en)	1991-10-23
EP0435304B1 EP0435304B1 (en)	1998-07-29

Family

ID=18285998

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19900125621 Expired - Lifetime EP0435304B1 (en)	1989-12-26	1990-12-27	Acoustic apparatus and driving apparatus constituting the same

Country Status (3)

Country	Link
EP (1)	EP0435304B1 (en)
JP (1)	JP3035943B2 (en)
DE (1)	DE69032523T2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102004021546A1 (en) *	2004-05-03	2005-12-08	Avantgarde Acoustic Lautsprechersysteme Gmbh	Electroacoustic transducer for loudspeaker with horn incorporates amplifier with negative output impedance and has power amplifier with negative feedback via resistor
JP4887968B2 (en) *	2006-08-09	2012-02-29	ヤマハ株式会社	Audio conferencing equipment
US8401207B2 (en) *	2009-03-31	2013-03-19	Harman International Industries, Incorporated	Motional feedback system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4550430A (en) *	1981-02-20	1985-10-29	Meyers Stanley T	Sound reproducing system utilizing motional feedback and an improved integrated magnetic structure
EP0181608A1 (en) *	1984-11-07	1986-05-21	BBE Sound, Inc.	Reference load amplifier correction systemand method
EP0293806A2 (en) *	1987-06-02	1988-12-07	Yamaha Corporation	Dynamic Loudspeaker driving apparatus
EP0340762A2 (en) *	1988-05-06	1989-11-08	Yamaha Corporation	Impedance compensation circuit in a speaker driving system

1989
- 1989-12-26 JP JP33521089A patent/JP3035943B2/en not_active Expired - Fee Related
1990
- 1990-12-27 EP EP19900125621 patent/EP0435304B1/en not_active Expired - Lifetime
- 1990-12-27 DE DE1990632523 patent/DE69032523T2/en not_active Expired - Fee Related

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4550430A (en) *	1981-02-20	1985-10-29	Meyers Stanley T	Sound reproducing system utilizing motional feedback and an improved integrated magnetic structure
EP0181608A1 (en) *	1984-11-07	1986-05-21	BBE Sound, Inc.	Reference load amplifier correction systemand method
EP0293806A2 (en) *	1987-06-02	1988-12-07	Yamaha Corporation	Dynamic Loudspeaker driving apparatus
EP0340762A2 (en) *	1988-05-06	1989-11-08	Yamaha Corporation	Impedance compensation circuit in a speaker driving system

Also Published As

Publication number	Publication date
JP3035943B2 (en)	2000-04-24
JPH03196798A (en)	1991-08-28
DE69032523T2 (en)	1999-04-08
DE69032523D1 (en)	1998-09-03
EP0435304B1 (en)	1998-07-29
EP0435304A2 (en)	1991-07-03

Legal Events

Date	Code	Title	Description
1991-05-17	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1991-07-03	17P	Request for examination filed	Effective date: 19910102
1991-07-03	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB
1991-09-03	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1991-10-23	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB
1991-12-27	16A	New documents despatched to applicant after publication of the search report
1994-01-12	17Q	First examination report despatched	Effective date: 19931201
1997-10-09	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
1998-01-30	GRAG	Despatch of communication of intention to grant	Free format text: ORIGINAL CODE: EPIDOS AGRA
1998-01-30	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
1998-05-25	GRAH	Despatch of communication of intention to grant a patent	Free format text: ORIGINAL CODE: EPIDOS IGRA
1998-06-12	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1998-07-29	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): DE FR GB
1998-09-03	REF	Corresponds to:	Ref document number: 69032523 Country of ref document: DE Date of ref document: 19980903
1998-12-18	ET	Fr: translation filed
1999-06-04	PLBE	No opposition filed within time limit	Free format text: ORIGINAL CODE: 0009261
1999-06-04	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT
1999-07-21	26N	No opposition filed
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
2006-12-08	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: FR Payment date: 20061208 Year of fee payment: 17
2006-12-21	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: DE Payment date: 20061221 Year of fee payment: 17
2006-12-27	PGFP	Annual fee paid to national office [announced via postgrant information from national office to epo]	Ref country code: GB Payment date: 20061227 Year of fee payment: 17
2008-08-27	GBPC	Gb: european patent ceased through non-payment of renewal fee	Effective date: 20071227
2008-10-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080701
2008-11-21	REG	Reference to a national code	Ref country code: FR Ref legal event code: ST Effective date: 20081020
2008-12-31	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20071227
2009-04-30	PG25	Lapsed in a contracting state [announced via postgrant information from national office to epo]	Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20071231

Publication	Publication Date	Title
GB2237920B (en)	1994-01-05	Disk driving apparatus
GB2252825B (en)	1992-12-02	Vibrating transducers
EP0435342A3 (en)	1991-12-04	Cleaning blade and apparatus employing the same
HK1007375A1 (en)	1999-04-09	Electroacoustic transducer apparatus
EP0406834A3 (en)	1991-03-27	Charging member and elecrophotographic apparatus using the same
EP0427177A3 (en)	1992-07-22	Vibrator
GB2225830B (en)	1992-11-04	Drive apparatus
KR960009582B1 (en)	1996-07-20	Display device and the driving method
GB2227086B (en)	1992-05-20	Destaticising and cleaning apparatus
EP0440440A3 (en)	1992-11-04	Disk driving apparatus
GB9005114D0 (en)	1990-05-02	Apparatus for forming and driving staples
AU110744S (en)	1991-04-15	Transducer
GB9005574D0 (en)	1990-05-09	Acoustic transducer
GB2236208B (en)	1994-03-16	Disk driving apparatus
GB2215049B (en)	1991-08-21	Acoustic devices
EP0408329A3 (en)	1991-09-04	Acoustic vibrational material
EP0435304A3 (en)	1991-10-23	Acoustic apparatus and driving apparatus constituting the same
EP0409429A3 (en)	1992-03-18	Loudspeaker drive unit
EP0411671A3 (en)	1991-10-09	Acoustic apparatus
GB9005129D0 (en)	1990-05-02	Apparatus for forming and driving staples
EP0435337A3 (en)	1991-10-09	Acoustic apparatus
GB2238420B (en)	1994-06-01	Acoustic device
GB8908145D0 (en)	1989-05-24	Cleaning apparatus and methods
GB2281604B (en)	1996-11-27	Vibrator apparatus
GB8812367D0 (en)	1988-06-29	Vibratory apparatus