Dynamic element-matching method, multi-bit DAC using the method, and delta-sigma modulator and delta-sigma DAC including the multi-bit DAC
    11.
    发明授权
    Dynamic element-matching method, multi-bit DAC using the method, and delta-sigma modulator and delta-sigma DAC including the multi-bit DAC 有权
    动态元件匹配方法,使用该方法的多位DAC,以及包括多位DAC的Δ-Σ调制器和Δ-ΣDAC

    公开(公告)号:US07719455B2

    公开(公告)日:2010-05-18

    申请号:US12195232

    申请日:2008-08-20

    IPC分类号: H03M1/66

    摘要: Provided are a dynamic element-matching method, a multi-bit Digital-to-Analog Converter (DAC), and a delta-sigma modulator with the multi-bit DAC and delta-sigma DAC with the multi-bit DAC. The dynamic element-matching method relates to preventing periodic signal components (in-band tones) from being generated from a delta-sigma modulator of a delta-sigma Analog-to-Digital Converter (ADC) and a multi-bit DAC used in a delta-sigma DAC. Unit elements are selected in a new sequence according to a simple algorithm every time that each of unit elements is selected once, and thus the unit elements are not periodically used. Consequently, it is possible to prevent in-band tones caused by a conventional Data Weighted Averaging (DWA) algorithm.

    摘要翻译: 提供了动态元件匹配方法,多位数模转换器(DAC)和具有多位DAC的多位DAC和Δ-ΣDAC的Δ-Σ调制器。 动态元件匹配方法涉及防止从Δ-Σ模数转换器(ADC)的delta-sigma调制器和用于在A-Sigma模数转换器(ADC)中使用的多位DAC的周期性信号分量(带内音调) Δ-ΣDAC。 每次选择一个单位元素一次时,根据简单算法以新的顺序选择单位元素,因此单位元素不被周期性地使用。 因此,可以防止由传统的数据加权平均(DWA)算法引起的带内音调。

    Multi-bit delta-sigma modulator
    13.
    发明授权
    Multi-bit delta-sigma modulator 有权
    多位delta-Σ调制器

    公开(公告)号:US07545301B2

    公开(公告)日:2009-06-09

    申请号:US11950481

    申请日:2007-12-05

    IPC分类号: H03M3/00

    摘要: A delta-sigma modulator having a first integrator for integrating an input signal; an analog-to-digital converter for converting the integrated signal into a digital signal; a delay circuit for delaying an output signal of the analog-to-digital converter; and a differential delay circuit for differentially delaying the output signal of the analog-to-digital converter. More particularly, the delta-sigma modulator has low distortion characteristics suitable for multi-bit fast operation, wherein a feedback signal is delayed by one clock period through the delay circuit and the differential delay circuit.

    摘要翻译: 一种Δ-Σ调制器,具有用于积分输入信号的第一积分器; 用于将积分信号转换为数字信号的模拟 - 数字转换器; 延迟电路,用于延迟模数转换器的输出信号; 以及用于差分地延迟模数转换器的输出信号的差分延迟电路。 更具体地,Δ-Σ调制器具有适合于多位快速操作的低失真特性,其中通过延迟电路和差分延迟电路将反馈信号延迟一个时钟周期。