JPS57138294A - Speaker driver - Google Patents

Speaker driver

Info

Publication number
JPS57138294A
JPS57138294A JP2374481A JP2374481A JPS57138294A JP S57138294 A JPS57138294 A JP S57138294A JP 2374481 A JP2374481 A JP 2374481A JP 2374481 A JP2374481 A JP 2374481A JP S57138294 A JPS57138294 A JP S57138294A
Authority
JP
Japan
Prior art keywords
temperature
circuit
output
speaker
voice coil
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
JP2374481A
Other languages
Japanese (ja)
Inventor
Kiyofumi Inanaga
Hiroshi Koizumi
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP2374481A priority Critical patent/JPS57138294A/en
Publication of JPS57138294A publication Critical patent/JPS57138294A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type

Landscapes

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

Abstract

PURPOSE:To put a speaker in invariably normal operation and to evade the damage of the speaker by supplying an input audio signal to a voice coil part only when the temperature of the voice coil part under temperature control is within a set temperature range. CONSTITUTION:The temperature of the voice coil part of a speaker 1 under the temperature control of temperature control parts 9 which absorb or generate heat is detected by a temperature detecting element 12 to generate a voltage output which corresponds to the temperature. This output voltage is compared by a comparing circuit 24 with a reference voltage VV, and its output is supplied to a level and polarity control circuit 22 to adjust a DC output from an integral network 21. The output voltage of the element 12 is compared with reference voltages VL and VH by comparing circuit 26 and 27 respectiely, whose comparison outputs when both 1s are supplied via an AND circuit 30 to a switch control circuit 31, thereby turning on a switch 18 by a control signal generated by the circuit 31. Consequently, an input audio signal is supplied to the voice coil part of the speaker 1 through an output amplifying circuit.
JP2374481A 1981-02-20 1981-02-20 Speaker driver Pending JPS57138294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2374481A JPS57138294A (en) 1981-02-20 1981-02-20 Speaker driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2374481A JPS57138294A (en) 1981-02-20 1981-02-20 Speaker driver

Publications (1)

Publication Number Publication Date
JPS57138294A true JPS57138294A (en) 1982-08-26

Family

ID=12118811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2374481A Pending JPS57138294A (en) 1981-02-20 1981-02-20 Speaker driver

Country Status (1)

Country Link
JP (1) JPS57138294A (en)

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