JPS5487084A - Booster circuit for piezoelectric element drive - Google Patents

Booster circuit for piezoelectric element drive

Info

Publication number
JPS5487084A
JPS5487084A JP15467677A JP15467677A JPS5487084A JP S5487084 A JPS5487084 A JP S5487084A JP 15467677 A JP15467677 A JP 15467677A JP 15467677 A JP15467677 A JP 15467677A JP S5487084 A JPS5487084 A JP S5487084A
Authority
JP
Japan
Prior art keywords
coil
transistor
piezoelectric element
turned
diode
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
JP15467677A
Other languages
Japanese (ja)
Other versions
JPS5759998B2 (en
Inventor
Susumu Fujita
Shigeo Mori
Fumikazu Murakami
Yoshiaki Hara
Ichiro Horikoshi
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments and Electronics 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 Seiko Instruments and Electronics Ltd filed Critical Seiko Instruments and Electronics Ltd
Priority to JP15467677A priority Critical patent/JPS5487084A/en
Publication of JPS5487084A publication Critical patent/JPS5487084A/en
Publication of JPS5759998B2 publication Critical patent/JPS5759998B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Transducers For Ultrasonic Waves (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

PURPOSE: To prevent the energy charged into the piezoelectric element via the booster coil from flowing reversely to the booster coil again by inserting the diode between the booster coil and the piezoelectric element, and thus to utilize effectively the boosted voltage.
CONSTITUTION: With application of the rectangular wave of the audible frequency which is desired to deliver through the piezoelectric speaker to input terminal b, transistor 5 and 6 have the ON-OFF operation. With transistor 5 and 6 turned on, the potential difference across booster coil 7 and piezoelectric element 8 is fixed to the level equal to the voltage of battery 10. Then with transistor 5 and 6 turned off, the series circuit of coil 7, diode 9 and element 8 is put under the isolation state, and the stored energy of coil 7 flows into element 8 via diode 9. In other words, the energy stored in coil 7 are all transferred to element 8 at the instant when transistor 5 and 6 are turned off if the circuit loss is neglected.
COPYRIGHT: (C)1979,JPO&Japio
JP15467677A 1977-12-22 1977-12-22 Booster circuit for piezoelectric element drive Granted JPS5487084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15467677A JPS5487084A (en) 1977-12-22 1977-12-22 Booster circuit for piezoelectric element drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15467677A JPS5487084A (en) 1977-12-22 1977-12-22 Booster circuit for piezoelectric element drive

Publications (2)

Publication Number Publication Date
JPS5487084A true JPS5487084A (en) 1979-07-11
JPS5759998B2 JPS5759998B2 (en) 1982-12-17

Family

ID=15589462

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15467677A Granted JPS5487084A (en) 1977-12-22 1977-12-22 Booster circuit for piezoelectric element drive

Country Status (1)

Country Link
JP (1) JPS5487084A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021039944A1 (en) 2019-08-28 2021-03-04 サントリーホールディングス株式会社 Steviol glycoside composition and method for producing steviol glycoside composition from dried leaves of stevia plant

Also Published As

Publication number Publication date
JPS5759998B2 (en) 1982-12-17

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