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D-type amplifier

A technology of amplifying device and level, applied in amplifiers, low-frequency amplifiers, audio amplifiers, etc., can solve problems such as harsh hearing and speaker device failure, and achieve the effect of improving operability, simple structure, and suppressing noise.

Inactive Publication Date: 2010-06-09
YAMAHA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The popping sound is caused by the instability of the operating state of various circuits from the input part to the output part of the class D amplifier circuit. If a large noise is output, it will not only produce a harsh sense of hearing, but also make the speaker, etc. Various devices malfunction

Method used

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Examples

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Embodiment Construction

[0032]Next, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the embodiment described below is an embodiment in the case where the data processing device of the present invention is used in a class D amplifying device that amplifies an audio signal that is a digital signal by PWM modulation. In addition, for the parts provided on each channel, the part marked with (L) in the part name indicates the L channel (hereinafter also referred to as "Lch"), and the part marked with (R) in the part name indicates the R channel (hereinafter Also known as "Rch") components.

[0033] First, use figure 1 The configuration of the class D amplifying device in this embodiment will be described. figure 1 It is a block diagram showing a schematic configuration of the class D amplifying device of the present embodiment.

[0034] The class D amplifying device 100 of the present embodiment includes an oversampling unit 110 that perform...

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PUM

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Abstract

The invention relates to a data processing apparatus such as a D-class amplifying circuit and so on, characterized in reduced manufacturing cost based on miniaturization and the reduction of the partscount, and enhanced operability and flexibility when constructing the system based on the simplicity of the waveform setting or regulating. The D-class amplifying apparatus (100) generates cosine wave data during the beginning or the ending and serves the cosine wave data as the PWM signals input to LPF (190) to control the output voltage of the LPF (190) so as not to change rapidly, selectivelyswitchovers to the input data such as the voice data .etc, and serves the data as the data for an amplifying objects, and outputs the PWM signals which has been processed with noise shaping treatmentand modulated to LPF (190) .

Description

technical field [0001] The present invention relates to a class D amplifying device for performing data processing to remove noise such as popup noise. [0002] This application claims priority based on Japanese Patent Application No. 2006-309485 filed on November 15, 2006, and the contents thereof are incorporated herein by reference. Background technique [0003] Currently, there are known amplifying devices for various audio products such as class A amplifier circuits, class B amplifier circuits, and class C amplifier circuits (hereinafter simply referred to as "amplifier circuits"). From this point of view, digital amplifying devices (hereinafter referred to as "class D amplifying circuits") are becoming widespread. [0004] The class D amplifier circuit performs PWM (PulseWidth Modulation) modulation on the sound signal as a digital signal, directly amplifies the rectangular wave of the modulated signal obtained through the modulation, and then outputs it to the speake...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00H03F3/217H03K5/1254H03K7/08
CPCH03F1/26H03F3/181H03F3/217H03F2200/03H03F2200/351
Inventor 西冈直俊森岛守人
Owner YAMAHA CORP
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