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    • 4. 发明公开
    • 샘플링 정확도를 증가시키기 위한 아날로그 리셋 회로를 적용시킨 시그마-델타 아날로그-디지털 컨버터
    • SIGMA-DELTA模拟数字转换器使用模拟复位电路来提高采样精度
    • KR1020130054588A
    • 2013-05-27
    • KR1020110120054
    • 2011-11-17
    • 한양대학교 산학협력단
    • 박상규임새민
    • H03M1/12H03M3/02
    • H03M3/496H03M1/002H03M1/12H03M2201/6107H03M2201/847
    • PURPOSE: A sigma-delta analog-digital converter is provided to increase overall resolution. CONSTITUTION: An operational amplifier(10) connects an input terminal to a fourth node(D) and connects an output terminal to an output end. A sampling capacitor(20) connects one end to a second node, connects the other end to a third node and samples. An integral capacitor(30) connects one end to the fourth node, connects the other end to an output terminal of the operational amplifier and feedbacks. A first switching circuit(40) switches sampling operation of a switched-capacitor integrator according to a sampling clock. A second switching circuit(50) switches integration operation of the switched-capacitor integrator according to an integration clock. A third switching circuit(70) switches reset operation of the switched-capacitor integrator according to a reset clock.
    • 目的:提供Σ-Δ模数转换器以提高整体分辨率。 构成:运算放大器(10)将输入端子连接到第四节点(D),并将输出端子连接到输出端。 采样电容器(20)将一端连接到第二节点,将另一端连接到第三节点并采样。 整体电容器(30)将一端连接到第四节点,将另一端连接到运算放大器的输出端并进行反馈。 第一开关电路(40)根据采样时钟切换开关电容积分器的采样操作。 第二开关电路(50)根据积分时钟切换开关电容积分器的积分动作。 第三开关电路(70)根据复位时钟切换开关电容积分器的复位动作。
    • 9. 发明公开
    • 저감된 평균 입력 전류 및 저감된 평균 기준 전류를 갖는A/D 컨버터
    • 具有降低的平均输入电流和降低的平均参考电流的模数转换器
    • KR1020070069192A
    • 2007-07-02
    • KR1020077010266
    • 2005-10-17
    • 리니어 테크놀러지 엘엘씨
    • 오프레스큐플로린에이.
    • H03M1/12H03M7/00
    • H03M3/322H03M3/43H03M3/456H03M3/496
    • Novel system and methodology for sampling analog input signals to reduce an average common-mode input current caused by unbalanced nodes of an input signal source. An analog-to-digital (A/D) conversion system for converting an analog input signal supplied by a signal source having first and second nodes may have a first sampling circuit coupled to the first node for sampling the input signal with respect to a reference signal and configured so as to provide a substantially zero total charge taken from the first node during a first sampling process, and a second sampling circuit coupled to the second node for sampling the input signal with respect to the reference signal and configured so as to provide a substantially zero total charge taken from the second node during a second sampling process. In response to first and second output signals respectively produced by the first and second sampling circuits, an output circuit may provide common-mode rejection.
    • 用于采样模拟输入信号的新型系统和方法,以减少由输入信号源的不平衡节点引起的平均共模输入电流。 用于转换由具有第一和第二节点的信号源提供的模拟输入信号的模数(A / D)转换系统可以具有耦合到第一节点的第一采样电路,用于对输入信号进行采样 信号并被配置为在第一采样过程期间提供从第一节点获取的基本为零的总电荷,以及耦合到第二节点的第二采样电路,用于相对于参考信号对输入信号进行采样,并且被配置为提供 在第二采样过程中从第二节点获取的基本为零的总电荷。 响应于由第一和第二采样电路分别产生的第一和第二输出信号,输出电路可以提供共模抑制。