Invention Grant
- Patent Title: Vehicle proximity annunciator device
- Patent Title (中): 车辆接近报警装置
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Application No.: US13794945Application Date: 2013-03-12
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Publication No.: US09000900B2Publication Date: 2015-04-07
- Inventor: Haruyuki Tsuzuki , Yoshimitsu Ukai , Yukiko Matsubara , Chikara Yamamoto
- Applicant: Anden Co., Ltd.
- Applicant Address: JP Anjo
- Assignee: Anden Co., Ltd.
- Current Assignee: Anden Co., Ltd.
- Current Assignee Address: JP Anjo
- Agency: Posz Law Group, PLC
- Priority: JP2012-73868 20120328
- Main IPC: B60Q1/00
- IPC: B60Q1/00 ; G08B3/00 ; G08B3/10 ; H03F99/00 ; B60Q5/00 ; H03F1/30 ; H03G3/34 ; H04R3/02

Abstract:
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.
Public/Granted literature
- US20130257605A1 VEHICLE PROXIMITY ANNUNCIATOR DEVICE Public/Granted day:2013-10-03
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