Invention Grant
- Patent Title: Electronic device for generation of an audible alarm or music
- Patent Title (中): 用于产生声音报警或音乐的电子设备
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Application No.: US14863892Application Date: 2015-09-24
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Publication No.: US09537454B2Publication Date: 2017-01-03
- Inventor: Massimiliano Bracco
- Applicant: The Swatch Group Research and Development Ltd
- Applicant Address: CH Marin
- Assignee: The Swatch Group Research and Development Ltd
- Current Assignee: The Swatch Group Research and Development Ltd
- Current Assignee Address: CH Marin
- Agency: Sughrue Mion, PLLC
- Priority: EP14187778 20141006
- Main IPC: H04R29/00
- IPC: H04R29/00 ; H03F3/183 ; G10K9/12 ; B06B1/02 ; H03F3/217 ; H04R17/10

Abstract:
The electronic device is arranged for generation of an audible alarm or music. It includes a coil or inductor and a buzzer provided with a capacitor connected in series with the coil. When the electronic device is actuated, the buzzer generates the audible alarm or music. The electronic device further includes, in a feedback loop, a derivative circuit connected to a connection node between the coil and the capacitor, to produce a derivative of the signal from the capacitor, and a comparator for comparing a derivative signal from the derivative circuit with a reference voltage. The comparator supplies an output signal to the coil to amplify the signal across the capacitor, so that the buzzer generates at least one audible alarm.
Public/Granted literature
- US20160100251A1 ELECTRONIC DEVICE FOR GENERATION OF AN AUDIBLE ALARM OR MUSIC Public/Granted day:2016-04-07
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