发明名称 |
VEHICLE PROXIMITY ANNUNCIATOR DEVICE |
摘要 |
A vehicle proximity annunciator device reduces an occurrence of a pop noise without an additional circuit changing an output of a power amplifier. A capacitor is located between a connection point connecting multiple resistances generating a reference voltage and a ground terminal. The capacitor causes a rise-up time of the reference voltage to delay at a start of power supply to a power source terminal. A sound emission signal is increased at substantially a same level of the reference voltage so that a variation of a differential voltage between the reference voltage and the sound emission signal falls in a pre-determined range.
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申请公布号 |
US2013257605(A1) |
申请公布日期 |
2013.10.03 |
申请号 |
US201313794945 |
申请日期 |
2013.03.12 |
申请人 |
ANDEN CO., LTD. |
发明人 |
TSUZUKI HARUYUKI;UKAI YOSHIMITSU;MATSUBARA YUKIKO;YAMAMOTO CHIKARA |
分类号 |
B60Q5/00 |
主分类号 |
B60Q5/00 |
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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