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    • 7. 发明公开
    • 델타 시그마 아날로그 디지털 컨버터
    • DELTA SIGMA模拟到数字转换器
    • KR1020100097836A
    • 2010-09-06
    • KR1020090016688
    • 2009-02-27
    • 서울대학교산학협력단
    • 이현중우종관신우열이형민김수환
    • H03M1/12H03M3/02
    • H03M3/478H03M1/186H03M2201/6107H03M2201/6128H03M2201/6135
    • PURPOSE: A delta-sigma analog digital converter is provided to obtain a wide operation region by converting a dynamic range through the control of the current which is fed back. CONSTITUTION: A modulator(110) generates an over-sampled PDM(Pulse Density Modulated) signal by converting an analog input current. A post process unit generates digital data corresponding to the analog input current by decreasing a sampling ratio of the generated PDM signal. The post process unit generates a selection signal to control the dynamic range of the modulator. The modulator includes a plurality of current source which generates the current with different sizes. The modulator includes a current supply unit(510) which adds the current generated from the selected current source to the analog input current.
    • 目的:提供一个Δ-Σ模拟数字转换器,通过转换反馈电流的控制转换一个动态范围来获得宽的操作区域。 构成:调制器(110)通过转换模拟输入电流产生过采样的PDM(脉冲密度调制)信号。 后处理单元通过减少所生成的PDM信号的采样比来产生与模拟输入电流相对应的数字数据。 后处理单元产生选择信号以控制调制器的动态范围。 调制器包括产生不同尺寸的电流的多个电流源。 调制器包括电流供应单元(510),其将从所选择的电流源产生的电流加到模拟输入电流上。