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CN108398142A 用于电阻传感器结构的偏置和读出的方法和电路 有权

用于电阻传感器结构的偏置和读出的方法和电路
摘要：
一种偏置和读出具有两个激励节点(A、C)和两个读出节点(B、D)的无源电阻传感器结构(301)的方法，所述方法包括以下步骤：a)确定与第一电荷量(Q1)对应的第一电容器(C1)的第一状态(V1)；b)偏置传感器结构使得偏置电流(I偏置)在第一时间间隔(T1)期间流过所述第一电容器(C1)，c)确定(430)与第二电荷量(Q2)对应的第一电容器(C1)的第二状态(V2)；d)在与第一时间间隔(T1)有关的第二时间间隔(T2)期间，对读出信号积分或求平均，由此获得被积分或被求平均的读出信号(Vi)；e)基于被积分或被求平均的读出信号(ΔVi)和第一电容器(C1)的状态变化(ΔV)来确定(440)传感器读出信号(V出)。
摘要（英）：

Disclosed is a method of biasing and reading-out a passive resistive sensor structure (301) having two excitation nodes (A, C) and two readout nodes (B, D), the method comprising the steps of: a) determining a first state (V1) of a first capacitor (C1) corresponding to a first amount of charge (Q1); b) biasing the sensor structure such that a biasing current (Ibias) flows through said first capacitor (C1) during a first time interval (T1), c) determining (430) a second state (V2) of the first capacitor (C1) corresponding to a second amount of charge (Q2); d) integrating or averaging the readout signal during a second time interval (T2) related to the first time interval (T1), thereby obtaining an integrated or averaged readout signal (Vi); e) determining (440) the sensor readout signal (Vout) based on the integrated or averaged readout signal ([delta]Vi) and a change in state ([delta]V) of the first capacitor (C1).

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