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    • 8. 发明申请
    • CURRENT MEASUREMENT CIRCUIT AND METHOD
    • 电流测量电路和方法
    • WO2007069102A3
    • 2007-09-13
    • PCT/IB2006054233
    • 2006-11-14
    • KONINKL PHILIPS ELECTRONICS NVEDWARDS MARTIN J
    • EDWARDS MARTIN J
    • G01R19/255
    • G01R19/255Y10T292/106
    • Apparatus (1) and corresponding method for measuring a current (10) in which a charge integrating circuit (2) integrates charge from the current to be measured (10) and applies a resulting change in voltage to a comparator circuit (4) that compares the input voltage (12) with a threshold voltage level (Vthreshoid) and provides an output (14) responsive thereto to a logic circuit (6) that generates a feedback signal (16) dependent upon the comparator output (14) and provides the feedback signal (16) to the charge integrating circuit (2) that integrates charge from the received feedback signal (16) in opposition to the integrating of the charge from the current to be measured (10). The logic circuit (6) generates an output signal (18), based upon the comparator circuit output (14) and dependent upon the level of the current to be measured (10), for example a pulse (50) of a width (TOUT) dependent upon the level of the current (10). A converter circuit (8) may convert the output signal (18) to digital output data (20).
    • 用于测量电流(10)的装置(1)和相应的方法,其中电荷积分电路(2)将来自待测电流(10)的电荷积分,并将所得的电压变化应用于比较电路(4),比较电路 具有阈值电压电平(Vthreshoid)的输入电压(12),并且响应于逻辑电路(6)提供输出(14),逻辑电路(6)根据比较器输出(14)产生反馈信号(16),并提供反馈 信号(16)连接到电荷积分电路(2),该电荷积分电路(2)将来自接收的反馈信号(16)的电荷与从被测量电流(10)的电荷积分相反。 逻辑电路(6)基于比较器电路输出(14)产生输出信号(18),并且取决于待测电流(10)的电平,例如宽度(TOUT)的脉冲(50) )取决于当前(10)的水平。 A转换器电路(8)可以将输出信号(18)转换成数字输出数据(20)。