Invention Grant
- Patent Title: Semiconductor device and sound output device
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Application No.: US16749835Application Date: 2020-01-22
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Publication No.: US11190889B2Publication Date: 2021-11-30
- Inventor: Takanori Hashimoto
- Applicant: LAPIS Semiconductor Co., Ltd.
- Applicant Address: JP Yokohama
- Assignee: LAPIS Semiconductor Co., Ltd.
- Current Assignee: LAPIS Semiconductor Co., Ltd.
- Current Assignee Address: JP Yokohama
- Agency: Rabin & Berdo, P.C.
- Priority: JPJP2019-009450 20190123
- Main IPC: H04R29/00
- IPC: H04R29/00 ; H03G3/30

Abstract:
A semiconductor device is provided, the device including a first detection section having a removal section to remove DC offset components included in each of an input signal and an output signal output from an amplification section that amplifies the input signal, and a correction section configured to perform correction to match phases of the input signal and the output signal from which the DC offset components have been removed, and to match gains of the input signal and of the output signal, the first detection section comparing a waveform of the input signal to a waveform of the output signal, and a second detection section to detect a mismatch between the DC offset component included in the input signal that is input into the removal section and the DC offset component included in the output signal that is input into the removal section.
Public/Granted literature
- US20200236483A1 SEMICONDUCTOR DEVICE AND SOUND OUTPUT DEVICE Public/Granted day:2020-07-23
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