Invention Grant
- Patent Title: Dynamic range compression circuit and class D amplifier
- Patent Title (中): 动态范围压缩电路和D类放大器
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Application No.: US13353101Application Date: 2012-01-18
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Publication No.: US08902013B2Publication Date: 2014-12-02
- Inventor: Hirotoshi Tsuchiya , Shinji Yaezawa
- Applicant: Hirotoshi Tsuchiya , Shinji Yaezawa
- Applicant Address: JP Hamamatsu-shi
- Assignee: Yamaha Corporation
- Current Assignee: Yamaha Corporation
- Current Assignee Address: JP Hamamatsu-shi
- Agency: Crowell & Moring LLP
- Priority: JP2011-009195 20110119
- Main IPC: H03F3/217
- IPC: H03F3/217 ; H03G7/08 ; H03G7/00

Abstract:
A dynamic range compression circuit includes an attenuator that attenuates a signal at a predetermined node in an amplifier to reduce a gain of the amplifier and a gain controller that reduces the gain of the amplifier by the attenuator so that an amplitude of an output signal of the amplifier becomes an arbitrary output limit voltage in a case where an input signal having the same amplitude as that of an input-stage maximum voltage of the amplifier is input into the amplifier, and increases the gain of the amplifier by reducing a degree of attenuation of the attenuator according to a decrease of the amplitude of the input signal of the amplifier from the input-stage maximum voltage in a case where the amplitude of the input signal of the amplifier is smaller than the input-stage maximum voltage.
Public/Granted literature
- US20120182081A1 Dynamic Range Compression Circuit and Class D Amplifier Public/Granted day:2012-07-19
Information query
IPC分类: