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Analog-to-digital conversion system and audio equipment

A technology of analog-to-digital conversion and digital circuit, which is applied in the direction of analog-to-digital converter, analog/digital conversion, code conversion, etc., and can solve problems such as limiting the scope of application

Pending Publication Date: 2021-07-06
ACTIONS ZHUHAI TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ADC system with fixed oversampling rate limits its application range

Method used

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  • Analog-to-digital conversion system and audio equipment
  • Analog-to-digital conversion system and audio equipment
  • Analog-to-digital conversion system and audio equipment

Examples

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Embodiment Construction

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0044] Furthermore, the drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be impleme...

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Abstract

The invention discloses an analog-to-digital conversion system and audio equipment. The analog-to-digital conversion system comprises a clock control circuit which is used for providing clock signals according with each design ratio according to different preset oversampling rates, wherein the clock signal comprises a first digital clock signal, a second digital clock signal and an analog clock signal; an analog circuit which is used for outputting corresponding oversampling signals according to different analog clock signals; and a digital circuit which is used for performing first extraction on the oversampling signal according to the first digital clock signal to obtain a first extraction signal, and further performing second extraction on the first extraction signal according to the second digital clock signal to output a second extraction signal meeting the sampling rate requirement. Therefore, the oversampling rate of the system can be improved and higher performance can be obtained in an application requiring high performance, and the working frequency of the system can be reduced and power consumption can be saved by using a low oversampling rate in a low-power-consumption application.

Description

technical field [0001] The invention relates to the field of audio technology, in particular to an analog-to-digital conversion system and audio equipment. Background technique [0002] In audio equipment, the role of the ADC (Analog-to-Digital Converter, analog-to-digital converter) system is very important. In a traditional ADC system, the ADC analog part works with a clock that is a fixed multiple of the output sampling rate (Fs, sampling frequency). This ratio is called the oversampling rate (OVFS, oversampling frequency). Usually OVFS=128, there are also 256 or other magnifications, and this magnification is usually fixed in an ADC system, for example, the fixed value is 128, and the ADC analog part works at 128 times the clock (128Fs). [0003] The output sampling rate usually has two sampling rate series of Fs=44.1KHz / 48KHz, and the corresponding 128Fs clock frequency is 5.6448MHz / 6.144MHz. In order to generate a clock of this frequency, a PLL (phase-locked-loop, ph...

Claims

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Application Information

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IPC IPC(8): H03M1/12G10L19/00
CPCH03M1/1245H03M1/12G10L19/00
Inventor 李新辉
Owner ACTIONS ZHUHAI TECH CO
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