JPS57192194A - Speaker system - Google Patents

Speaker system

Info

Publication number
JPS57192194A
JPS57192194A JP7566681A JP7566681A JPS57192194A JP S57192194 A JPS57192194 A JP S57192194A JP 7566681 A JP7566681 A JP 7566681A JP 7566681 A JP7566681 A JP 7566681A JP S57192194 A JPS57192194 A JP S57192194A
Authority
JP
Japan
Prior art keywords
voltage
speaker
constant
controlling
fet
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
JP7566681A
Other languages
Japanese (ja)
Inventor
Kenichi Takahashi
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 JP7566681A priority Critical patent/JPS57192194A/en
Publication of JPS57192194A publication Critical patent/JPS57192194A/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

Abstract

PURPOSE:To make a terminal voltage of a speaker almost constant with a minimum power loss, by dividng an input terminal voltage with a voltage divider and controlling a voltage controlling element through the difference between the voltage divided output a reference signal. CONSTITUTION:A voltage controlling resistance element 3 consists of an FET, and a voltage divider consists of a series circuit of impedances Z1 and Z2. A diaphragm of a speaker is fitted with an acceleration pickup 6 and the output is used as a reference signal (es). The difference between the signal (es) and the voltage divided with the voltage divider is made at a differential amplifier 4 and applied to the gate of an FET. When the voltage dividing ratio Z2/(Z1+Z2) is selected as a close value to the frequency characteristic of the speaker, the terminal voltage of the speaker shows almost constant amplitude under the control. As a result, a voltage given to the element 3 can be made to a constant and minute voltage, allowing to minimize the power loss.
JP7566681A 1981-05-21 1981-05-21 Speaker system Pending JPS57192194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7566681A JPS57192194A (en) 1981-05-21 1981-05-21 Speaker system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7566681A JPS57192194A (en) 1981-05-21 1981-05-21 Speaker system

Publications (1)

Publication Number Publication Date
JPS57192194A true JPS57192194A (en) 1982-11-26

Family

ID=13582758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7566681A Pending JPS57192194A (en) 1981-05-21 1981-05-21 Speaker system

Country Status (1)

Country Link
JP (1) JPS57192194A (en)

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