JPS57196697A - Dynamic type speaker - Google Patents

Dynamic type speaker

Info

Publication number
JPS57196697A
JPS57196697A JP8080681A JP8080681A JPS57196697A JP S57196697 A JPS57196697 A JP S57196697A JP 8080681 A JP8080681 A JP 8080681A JP 8080681 A JP8080681 A JP 8080681A JP S57196697 A JPS57196697 A JP S57196697A
Authority
JP
Japan
Prior art keywords
magnetic flux
output
exciting coil
comparison
magnetic
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
JP8080681A
Other languages
Japanese (ja)
Inventor
Shozo Kinoshita
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.)
Pioneer Corp
Original Assignee
Pioneer Corp
Pioneer Electronic 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.)
Filing date
Publication date
Application filed by Pioneer Corp, Pioneer Electronic Corp filed Critical Pioneer Corp
Priority to JP8080681A priority Critical patent/JPS57196697A/en
Publication of JPS57196697A publication Critical patent/JPS57196697A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • 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)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To suppress the generation of harmonic distortion due to the change in magnetic flux, ane the fluctuation of the operating point, by making the magnetic flux density constant and adjusting a current flowing to an exciting coil through the detection of the magnetic flux of a magnetic circuit and the comparison with a reference value. CONSTITUTION:An exciting coil 9 is wound on a center pole 2a of a magnetic circuit and a magnetism detecting element 10 is installed in a magnetic gap G. After the output of the element 10 is amplified at a preamplifier 11, the output is compared with a reference voltage E at a comparison amplifier 12. After this comparison output is amplified at a power amplifier 13, it is applied to the exciting coil 9. The exciting coil 9 generates magnetic flux having opposite phase and almost the same amplitude as the magnetic flux generated with the voice coil 5. Thus, control is made so that the output of the element 10 is equal to the reference voltage E.
JP8080681A 1981-05-29 1981-05-29 Dynamic type speaker Pending JPS57196697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8080681A JPS57196697A (en) 1981-05-29 1981-05-29 Dynamic type speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8080681A JPS57196697A (en) 1981-05-29 1981-05-29 Dynamic type speaker

Publications (1)

Publication Number Publication Date
JPS57196697A true JPS57196697A (en) 1982-12-02

Family

ID=13728703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8080681A Pending JPS57196697A (en) 1981-05-29 1981-05-29 Dynamic type speaker

Country Status (1)

Country Link
JP (1) JPS57196697A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6289900U (en) * 1985-11-22 1987-06-09
KR100415953B1 (en) * 2001-12-27 2004-01-24 에스텍 주식회사 Combination structure of yoke and frame for speaker
KR100428360B1 (en) * 2001-12-07 2004-04-28 현대자동차주식회사 Sound pressure variableness speaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6289900U (en) * 1985-11-22 1987-06-09
KR100428360B1 (en) * 2001-12-07 2004-04-28 현대자동차주식회사 Sound pressure variableness speaker
KR100415953B1 (en) * 2001-12-27 2004-01-24 에스텍 주식회사 Combination structure of yoke and frame for speaker

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