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发明公开
CN106370326A 阻抗式传感器及应用其的电子装置 无效 - 撤回

阻抗式传感器及应用其的电子装置
摘要：
本发明提供一种阻抗式传感器及应用其的电子装置。阻抗式传感器包括桥式阻抗电路、补偿电路以及信号处理电路。桥式阻抗电路具有输入侧以及输出侧，用以反应于物理压力产生第一阻抗变化。补偿电路并接于桥式阻抗电路的输入侧，用以反应于环境温度产生第二阻抗变化。信号处理电路用以分别检测第一与第二阻抗变化，并据以产生指示第一阻抗变化的第一感测信号与指示第二阻抗变化的第二感测信号。信号处理电路依据第一与第二感测信号进行信号处理，借以利用第二感测信号补偿第一感测信号的温度偏移部分，并且据以产生压力感测信号。因此，本申请可通过检测补偿电路的阻抗变化来补偿桥式阻抗电路的温度偏移，进而不受环境温度变化影响。
摘要（英）：

An impedance sensor and an electronic apparatus using the same are provided. The impedance sensor includes an impedance-bridge circuit, a compensation circuit, and a signal processing circuit. The impedance-bridge circuit has an input side and an output side, and configured to generate a first impedance variation in response to a physical pressure. The compensation circuit is coupled to the input side of the impedance-bridge circuit in parallel, and configured to generate a second impedance variation in response to an environment temperature. The signal processing circuit respectively detects the first and the second impedance variations, and accordingly generates a first sensing signal indicating the first impedance variation and a second sensing signal indicating the second impedance variation, so as to compensate a temperature shift part of the first sensing signal by the second sensing signal and accordingly generate a pressure detection signal. As a result, the impedance sensor and the electronic apparatus can compensate a temperature shit of the bridge-type impedance circuit through detecting the impedance change of the compensation circuit without being effected by the ambient temperature change.

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