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Sigma-delta analog-to-digital converter and operation method thereof

A technology of analog-digital and operation method, applied in the field of analog-to-digital converter, can solve the problem of meaningless power, and achieve the effect of reducing power consumption and good performance

Pending Publication Date: 2020-10-30
FARADAY TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for an analog signal during silence, the power consumed by the DEM circuit running the DWA algorithm is meaningless

Method used

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  • Sigma-delta analog-to-digital converter and operation method thereof
  • Sigma-delta analog-to-digital converter and operation method thereof
  • Sigma-delta analog-to-digital converter and operation method thereof

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Embodiment Construction

[0037] As used throughout the specification of this application, including the claims, the term "coupled (or connected)" may refer to any means of connection, direct or indirect. For example, if it is described that a first device is coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be connected to the second device through other devices or certain A connection means indirectly connected to the second device. Terms such as "first" and "second" mentioned in the entire specification of this application (including the claims) are used to name elements (elements), or to distinguish different embodiments or ranges, and are not used to limit elements The upper or lower limit of the number is not used to limit the order of the elements. In addition, wherever possible, elements / components / steps using the same reference numerals in the drawings and embodiments represent the ...

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Abstract

A sigma-delta analog-to-digital converter (ADC) and operation method thereof are provided. The sigma-delta controller includes a sigma-delta modulator, a dynamic element matching (DEM) circuit and a control circuit. An input terminal of the sigma-delta modulator is configured to receive an analog signal. The sigma-delta modulator is configured to convert the analog signal into a digital signal based on a feedback signal. The DEM circuit is coupled to the sigma-delta modulator to receive the digital signal. The DEM circuit is configured to perform a DEM algorithm on the digital signal to generate a feedback signal, and provide the feedback signal to the sigma-delta modulator. The control circuit listens to the digital signal to detect a mute period. The control circuit disables the DEM circuit during the mute period to suspend a progress of the DEM algorithm.

Description

technical field [0001] The present invention relates to an analog-to-digital converter (analog-to-digital converter, ADC), and in particular to a sum-difference (Sigma-Delta, hereinafter referred to as Σ-Δ) analog-to-digital converter and an operation method thereof. Background technique [0002] Analog-to-digital converters have been widely used in various electronic devices (such as communication devices, consumer electronic products, audio equipment, etc.). However, within the analog-to-digital converter, nonlinear problems caused by component mismatch are unavoidable. Such issues are particularly important for sigma-delta modulators (Modulator). The dynamic element matching (DEM for short) technology can solve the non-linear problem of the analog-to-digital converter. A general DEM circuit can perform a Data Weighted Averaging (DWA) algorithm to provide a feedback signal (digital code) to the Σ-Δ modulator. In general, the advantages of the DWA algorithm are as follow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M3/00
CPCH03M3/32H03M3/338H03M3/472H03M1/0665H03M3/458H03M3/462
Inventor 陈乔民吴明远石世一陈柏良
Owner FARADAY TECH CORP