JPS54106221A - Drive circuit for piezoelectric speaker - Google Patents

Drive circuit for piezoelectric speaker

Info

Publication number
JPS54106221A
JPS54106221A JP1376378A JP1376378A JPS54106221A JP S54106221 A JPS54106221 A JP S54106221A JP 1376378 A JP1376378 A JP 1376378A JP 1376378 A JP1376378 A JP 1376378A JP S54106221 A JPS54106221 A JP S54106221A
Authority
JP
Japan
Prior art keywords
speaker
impedance
piezoelectric speaker
drive circuit
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
JP1376378A
Other languages
Japanese (ja)
Inventor
Koichi Tsuboi
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP1376378A priority Critical patent/JPS54106221A/en
Publication of JPS54106221A publication Critical patent/JPS54106221A/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
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE:To reduce the size and power consumption of an audio apparatus with the use of a piezoelectric speaker by compensating impedance with the use of a coil and a resistor which are connected in parallel. CONSTITUTION:The impedance of a speaker SP is compensated as the load of a driving push-pull transistor amplifier by means of a coil L and a variable resistor R, which are connected in parallel with the speaker SP. As a result, by the impedance compensation of the speaker, which is varied with the frequency, the frequency characteristics of the prezoelectric speaker acting as an audio apparatus which is small in size and driven with a low power consumption are flattened within a preset frequency range so that they can be driven to a setisfactory extent.
JP1376378A 1978-02-08 1978-02-08 Drive circuit for piezoelectric speaker Pending JPS54106221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1376378A JPS54106221A (en) 1978-02-08 1978-02-08 Drive circuit for piezoelectric speaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1376378A JPS54106221A (en) 1978-02-08 1978-02-08 Drive circuit for piezoelectric speaker

Publications (1)

Publication Number Publication Date
JPS54106221A true JPS54106221A (en) 1979-08-21

Family

ID=11842285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1376378A Pending JPS54106221A (en) 1978-02-08 1978-02-08 Drive circuit for piezoelectric speaker

Country Status (1)

Country Link
JP (1) JPS54106221A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577467B (en) * 2011-12-16 2017-04-11 阿威德鋼鐵工程公司 Device for supporting and oscillating continuous casting moulds in continuous casting plants

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577467B (en) * 2011-12-16 2017-04-11 阿威德鋼鐵工程公司 Device for supporting and oscillating continuous casting moulds in continuous casting plants

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