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Patent Searching and Data


Title:
CLASS-D AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2021/066061
Kind Code:
A1
Abstract:
This class-D amplifier is equipped with: a gain control unit that amplifies an inputted audio signal in accordance with a compensation gain to generate an input signal Vin; and a pulse width modulator that generates, in a first input range A1 where the value of the input value Vin is higher than a first boundary Vb1, a first pulse Vp having a pulse width that changes in accordance with the input signal Vin, and that generates, in a second input range A2 that partially overlaps the first input range A1 and where the value of the input signal Vin is lower than a second boundary Vb2, a second pulse Vn having a pulse width that changes in accordance with the input signal Vin. The gain control unit controls the compensation gain such that the slope of the input/output characteristics of the class-D amplifier in a first section where the pulse width modulator outputs both the first pulse Vp and the second pulse Vn approaches the slope of the input/output characteristics in a second section outside the first section.

Inventors:
MIZOSHIRI, Shinya (10-1 Nakazawa-cho, Naka-ku, Hamamatsu-sh, Shizuoka 50, JP)
NORO, Masao (10-1 Nakazawa-cho, Naka-ku, Hamamatsu-sh, Shizuoka 50, JP)
Application Number:
JP2020/037284
Publication Date:
April 08, 2021
Filing Date:
September 30, 2020
Export Citation:
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Assignee:
YAMAHA CORPORATION (Nakazawa-cho Naka-ku, Hamamatsu-sh, Shizuoka 50, JP)
International Classes:
H03G3/08; H03K7/08; H03F3/217
Attorney, Agent or Firm:
TACHIBANA, Kenji (Nakanoshima Intes Bldg. 6-2-40, Nakanoshima, Kita-ku, Osaka-sh, Osaka 05, JP)
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