JPS5537070A - Speaker - Google Patents

Speaker

Info

Publication number
JPS5537070A
JPS5537070A JP11041478A JP11041478A JPS5537070A JP S5537070 A JPS5537070 A JP S5537070A JP 11041478 A JP11041478 A JP 11041478A JP 11041478 A JP11041478 A JP 11041478A JP S5537070 A JPS5537070 A JP S5537070A
Authority
JP
Japan
Prior art keywords
coil
frame
magnetic flux
input
output
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.)
Pending
Application number
JP11041478A
Other languages
Japanese (ja)
Inventor
Takafumi Ueno
Tatsuo Fukuyama
Kenichi Takahashi
Koshin Shimada
Yoshiaki Harada
Shinichiro Ishii
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
Priority to JP11041478A priority Critical patent/JPS5537070A/en
Publication of JPS5537070A publication Critical patent/JPS5537070A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

PURPOSE:To increase both the heat resistance and the input resistance for the auxiliary coil by constituting the frame of auxiliary coil provided in the magnetic circuit at the driving part with the ceramics, thus securing the steady operation. CONSTITUTION:Voice coil 5 is provided between center pole 1 and plate 3. Then the magnetic flux formed by pole 1, plate 3 and coil 5 is negated, or the output voltage or the current difference of magnetic flux detecting coils 6 and 7 which make constant the product of the magnetic flux density and the coil length in order to turn the output to zero by differential amplifier 8. And feedback coil 9, using the output of amplifier 8 as its input, is then installed. Ceramic bobbin 10 is used for the frame of coil 9, and at the same time the flanges are formed across the frame into a body and in the axis direction of the frame. Thus the heat resistance of coil 9 can be increased with increased input, ensuring the highly stabilized operation.
JP11041478A 1978-09-07 1978-09-07 Speaker Pending JPS5537070A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11041478A JPS5537070A (en) 1978-09-07 1978-09-07 Speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11041478A JPS5537070A (en) 1978-09-07 1978-09-07 Speaker

Publications (1)

Publication Number Publication Date
JPS5537070A true JPS5537070A (en) 1980-03-14

Family

ID=14535164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11041478A Pending JPS5537070A (en) 1978-09-07 1978-09-07 Speaker

Country Status (1)

Country Link
JP (1) JPS5537070A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999014980A2 (en) * 1997-09-17 1999-03-25 Frank Albert Bilan A loudspeaker with lead wires extending through the magnetic assembly and integrated with an amplifier
US6421449B1 (en) * 1999-03-16 2002-07-16 Matsushita Electric Industrial Co, Ltd. Speaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999014980A2 (en) * 1997-09-17 1999-03-25 Frank Albert Bilan A loudspeaker with lead wires extending through the magnetic assembly and integrated with an amplifier
WO1999014980A3 (en) * 1997-09-17 1999-06-03 Frank Albert Bilan A loudspeaker with lead wires extending through the magnetic assembly and integrated with an amplifier
US6243472B1 (en) 1997-09-17 2001-06-05 Frank Albert Bilan Fully integrated amplified loudspeaker
US6421449B1 (en) * 1999-03-16 2002-07-16 Matsushita Electric Industrial Co, Ltd. Speaker

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