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    • 2. 发明授权
    • Multistage analog-to-digital converter
    • 多级模数转换器
    • US06970125B2
    • 2005-11-29
    • US10764133
    • 2004-01-23
    • Giovanni CesuraAndrea PanigadaAlessandro Bosi
    • Giovanni CesuraAndrea PanigadaAlessandro Bosi
    • H03M1/06H03M1/16H03M1/38
    • H03M1/0641H03M1/167
    • An analog-to-digital converter with a pipeline architecture for converting an analog input signal into a digital output signal with a predefined resolution includes a plurality of stages, each stage having a circuit for converting an analog local signal into a digital local signal with a local resolution lower than the predefined resolution, a circuit for determining an analog residue indicative of a quantization error of the converting circuit, a circuit for amplifying the analog residue by an inter-stage gain corresponding to the local resolution to generate the analog local signal for a next stage, and a circuit for combining the digital local signals of all the stages into the digital output signal weighting each digital local signal according to a digital weight depending on the corresponding inter-stage gain. The combining circuit includes, for at least one of the stages, a circuit for dynamically estimating a digital correction signal indicative of an analog error of the corresponding inter-stage gain, and a circuit for controlling the digital weight according to the digital correction signal.
    • 具有用于将模拟输入信号转换成具有预定分辨率的数字输出信号的流水线架构的模数转换器包括多个级,每级具有用于将模拟本地信号转换为数字本地信号的电路, 局部分辨率低于预定分辨率,用于确定表示转换电路的量化误差的模拟残余的电路,用于通过与局部分辨率对应的级间增益来放大模拟残差的电路,以产生模拟本地信号 以及用于将所有级的数字本地信号组合成数字输出信号的电路,用于根据相应的级间增益根据数字权重对每个数字本地信号进行加权。 组合电路对于至少一个级包括用于动态地估计表示相应级间增益的模拟误差的数字校正信号的电路和用于根据数字校正信号控制数字权重的电路。