JPS5487084A - Booster circuit for piezoelectric element drive - Google Patents
Booster circuit for piezoelectric element driveInfo
- 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
Links
Landscapes
- Circuit For Audible Band Transducer (AREA)
- Transducers For Ultrasonic Waves (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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114340404A (en) | 2019-08-28 | 2022-04-12 | 三得利控股株式会社 | Steviol glycoside compositions and methods of making steviol glycoside compositions from dried leaves of stevia rebaudiana plant |
-
1977
- 1977-12-22 JP JP15467677A patent/JPS5487084A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5759998B2 (en) | 1982-12-17 |
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