| 发明名称 |
PIEZO-ELECTRIC BUZZER DRIVING SYSTEM |
| 摘要 |
A drive system for a piezoelectrically operated buzzer (30) employs means for modulating a buzzer drive signal (SD) with a frequency (SM) which is lower than the frequency of the buzzer drive signal and lies within an audible frequency band. <IMAGE> |
| 申请公布号 |
JPS57210395(A) |
申请公布日期 |
1982.12.23 |
| 申请号 |
JP19810094720 |
申请日期 |
1981.06.19 |
| 申请人 |
RICOH KK |
发明人 |
SAKANO YUKIO;FUJITA NORIAKI |
| 分类号 |
G10K9/122;B06B1/02 |
主分类号 |
G10K9/122 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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