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R2R resistance network for audio digital-to-analog conversion and audio digital-to-analog conversion device

A resistance network and digital-to-analog conversion technology, which is applied in the direction of digital-to-analog converter, analog/digital conversion, code conversion, etc., can solve the problems of high precision and high cost of resistance

Pending Publication Date: 2020-05-19
昆山海菲曼科技集团股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the prior art, to propose a R2R resistor network and an audio digital-to-analog conversion device for audio digital-to-analog conversion, and to solve the problem of high cost of resistance precision improvement in the prior art

Method used

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  • R2R resistance network for audio digital-to-analog conversion and audio digital-to-analog conversion device
  • R2R resistance network for audio digital-to-analog conversion and audio digital-to-analog conversion device
  • R2R resistance network for audio digital-to-analog conversion and audio digital-to-analog conversion device

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Embodiment 1

[0026] see figure 1 as shown, figure 1 It is an embodiment of the present invention that the R2R resistor network consists of an R resistor structure and a 2R resistor structure in a ladder connection mode, and there is no requirement for the resistance value of the resistor structure, as long as the resistance values ​​of the 2R resistor structure and the R resistor structure satisfy a 2-fold relationship. . The R2R resistor network has a simple structure and is easy to build directly. The output impedance is constant and easy to calculate, and it is easy to achieve output impedance matching.

[0027] The R resistor structure and / or 2R resistor structure in the R2R resistor network provided in this embodiment can be formed by connecting resistors in parallel, by selecting a plurality of resistors whose resistance error from the target resistance value of the resistor structure is within a threshold range. The number of resistors in the resistor parallel composite structure ...

Embodiment 2

[0030] Please refer to Figure 5 , Figure 5 It is a schematic structural diagram of an audio digital-to-analog conversion device according to an embodiment of the present invention. The audio digital-to-analog conversion device 500 of this embodiment includes: a logic control unit 510, a reference voltage unit 520 and a resistor network 530, the reference voltage unit 520 provides a reference voltage to the resistor network 530, and the logic control unit 510 controls the resistor network according to the audio digital signal 530 switches the output analog signal. The resistor network 530 of this embodiment adopts any one of the R2R network structures in Embodiment 1, wherein the R resistor structure and / or the 2R resistor structure are composed of an even number of resistors connected in parallel, including at least one pair with the target A pair of resistors whose resistance values ​​have positive and negative deviations with equal magnitudes of resistance deviation. Par...

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Abstract

The invention provides an R2R resistor network for audio digital-to-analog conversion. The R2R resistor network comprises a plurality of R2R resistor structures which are connected with one another, wherein at least one resistor structure in the R2R resistor structures is composed of an even number of resistors, and the even number of resistors at least comprise one resistor pair which forms positive deviation and negative deviation with a target resistance value and is equal in resistance deviation amplitude. According to the invention, the resistor pair which have positive deviation and negative deviation with the target resistance value and have the same resistance deviation amplitude are connected in parallel to form the resistor structure, so that the low-precision resistor forms thehigh-precision resistor, the audio digital-to-analog conversion precision is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the field of audio digital-to-analog conversion, in particular to an R2R resistance network for audio digital-to-analog conversion and an audio digital-to-analog conversion device. Background technique [0002] The continuous development of the audio-visual entertainment market has promoted the continuous development of audio core technology. With the development of computer technology and Internet technology, digital to analog converter (DAC) digital storage, transmission and playback of music information is an indispensable technical means. A DAC is a device that converts a digital signal into an analog signal (in the form of current, voltage, or charge). The DAC converts the digitally stored and transmitted signal into an analog signal, and then converts it into a sound signal through an electroacoustic conversion device, which is perceived by people. [0003] Existing DAC architectures include resistor strings, R2R networ...

Claims

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Application Information

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IPC IPC(8): H03M1/66H03M1/06
CPCH03M1/662H03M1/06
Inventor 边仿
Owner 昆山海菲曼科技集团股份有限公司
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