发明名称 |
Buzzer with Zener diode in discharge path |
摘要 |
A relatively high voltage is developed across a buzzer by placing a resistance in the discharge path of an buzzer, e.g., by shunting one or more Zener diodes or LEDs across a switching transistor, the switching transistor being connected in series with the buzzer between a voltage potential and ground. Alternatively, the buzzer is shunted with a resistive element, with or without series connected a reversed biased diode. The result is a higher audio output without a corresponding increase in power consumption.
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申请公布号 |
US6111497(A) |
申请公布日期 |
2000.08.29 |
申请号 |
US19990266792 |
申请日期 |
1999.03.12 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
ANDERSSON, HAKAN;EKDAHL, BO |
分类号 |
G10K9/12;B06B1/02;G08B3/10;(IPC1-7):M01M37/04 |
主分类号 |
G10K9/12 |
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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