Piezoelectric audible sound generator
US4393373A · kind A · utility
10Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Mar 16, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S116/19
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A piezoelectric audible sound generator having a feedback type piezoelectric transducer, an amplifier, and a phase compensator for adjusting the phase shift due to the combination of a bias resistance of the amplifier and equivalent capacitance of the piezoelectric transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.