JPS54158196A - Piezoelectric acoustic device - Google Patents

Piezoelectric acoustic device

Info

Publication number
JPS54158196A
JPS54158196A JP6737278A JP6737278A JPS54158196A JP S54158196 A JPS54158196 A JP S54158196A JP 6737278 A JP6737278 A JP 6737278A JP 6737278 A JP6737278 A JP 6737278A JP S54158196 A JPS54158196 A JP S54158196A
Authority
JP
Japan
Prior art keywords
coil
electrode
generated
transistor
feedback
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.)
Granted
Application number
JP6737278A
Other languages
Japanese (ja)
Other versions
JPS5832392B2 (en
Inventor
Nobuhiko Fujita
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP53067372A priority Critical patent/JPS5832392B2/en
Publication of JPS54158196A publication Critical patent/JPS54158196A/en
Publication of JPS5832392B2 publication Critical patent/JPS5832392B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE: To obtain a self-oscillation device featuring the steady operation and large output by combining the piezoelectric element containing the driving electrode and the feedback electrode, the transistor and the transformer each.
CONSTITUTION: With make of the power supply, transistor 20 conducts immediately to supply the current to coil 23. And the voltage is generated at boosting coil 24 to be applied to driving electrode 14. Accordingly, piezoelectric oscillator 13 is bent, and thus the feedback signal of the negative potential is generated at feedback electrode 15 to make transistor 20 nonconductive. As a result, the adverse electromotive force is generated at coil 23 and accordingly at coil 24. Thus, oscillator 13 is bent oppositely to the former case. After this, the above action is repeated. Here in order to secure the steady and large-output self-oscillation, the area ratio must be about 1/4W4 between the driving electrode and the feedback electrode.
COPYRIGHT: (C)1979,JPO&Japio
JP53067372A 1978-06-05 1978-06-05 piezoelectric acoustic device Expired JPS5832392B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53067372A JPS5832392B2 (en) 1978-06-05 1978-06-05 piezoelectric acoustic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53067372A JPS5832392B2 (en) 1978-06-05 1978-06-05 piezoelectric acoustic device

Publications (2)

Publication Number Publication Date
JPS54158196A true JPS54158196A (en) 1979-12-13
JPS5832392B2 JPS5832392B2 (en) 1983-07-12

Family

ID=13343108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53067372A Expired JPS5832392B2 (en) 1978-06-05 1978-06-05 piezoelectric acoustic device

Country Status (1)

Country Link
JP (1) JPS5832392B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160026U (en) * 1980-04-25 1981-11-28
JPS5885887U (en) * 1981-12-07 1983-06-10 ソニー株式会社 piezoelectric vibrator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56160026U (en) * 1980-04-25 1981-11-28
JPS5885887U (en) * 1981-12-07 1983-06-10 ソニー株式会社 piezoelectric vibrator

Also Published As

Publication number Publication date
JPS5832392B2 (en) 1983-07-12

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