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    • 4. 发明公开
    • INDUCTOR-BASED CURRENT SENSING
    • STROMMESSUNG AUF INDUKTITTSTSBASIS
    • EP1723717A4
    • 2008-04-02
    • EP04811174
    • 2004-11-16
    • TRIPATH TECHNOLOGY INC
    • MAZDA BABAK
    • G01R19/00G01R15/18G01R19/25G05F1/40H03F20060101
    • G01R19/0092G01R15/18G01R19/2513
    • A circuit for sensing a current in an inductor is described. Integrator circuitry is operable to generate a first signal representing an integration of a voltage across the inductor. Comparison circuitry is operable to generate a reset signal each time the first signal reaches either a positive or negative threshold. The reset signal is for resetting the integrator circuitry. Logic circuitry is operable to generate a count direction signal indicating which of the positive and negative thresholds was reached to generate the reset signal. Counter circuitry is operable to increment or decrement a count representing the current in the inductor in response to the reset and count direction signals.
    • 描述了用于感测电感器中的电流的电路。 积分器电路可操作以产生表示电感器上的电压的积分的第一信号。 每当第一信号达到正阈值或负阈值时,比较电路就可操作以产生复位信号。 复位信号用于复位积分电路。 逻辑电路可操作以生成指示达到正阈值和负阈值中的哪一个以产生重置信号的计数方向信号。 响应于复位和计数方向信号,计数器电路可操作以递增或递减表示电感器中的电流的计数。
    • 5. 发明公开
    • INDUCTOR-BASED CURRENT SENSING
    • 基于电感的电流感测
    • EP1723717A2
    • 2006-11-22
    • EP04811174.4
    • 2004-11-16
    • Tripath Technology, Inc.
    • MAZDA, Babak
    • H03F1/00
    • G01R19/0092G01R15/18G01R19/2513
    • A circuit (100) for sensing a current in an inductor (102) is described. Integrator (104,106) circuitry is operable to generate a first signal representing an integration of a voltage across the inductor (102). Comparison circuitry (110,112) is operable to generate a reset signal each time the first signal reaches either a positive or negative threshold. The reset signal is for resetting the integrator (104,106) circuitry. Logic circuitry is operable to generate a count direction signal indicating which of the positive and negative thresholds was reached to generate the reset signal. Counter circuitry (120) is operable to increment or decrement a count representing the current in the inductor (102) in response to the reset and count direction signals.
    • 描述用于感测电感器(102)中的电流的电路(100)。 积分器(104,106)电路可操作以产生表示跨越电感器(102)的电压的积分的第一信号。 每次第一信号达到正阈值或负阈值时,比较电路(110,112)都可操作以产生复位信号。 复位信号用于复位积分器(104,106)电路。 逻辑电路可操作以生成指示达到正阈值和负阈值中的哪一个以产生重置信号的计数方向信号。 计数器电路(120)响应于复位和计数方向信号而可操作以递增或递减表示电感器(102)中的电流的计数。