巨磁阻传感器的温度补偿电路系统设计
发布时间：2018-10-31 09:56
【摘要】：巨磁阻传感器具有灵敏度高、易小型化、能耗低、应用前景广泛等特点,但其灵敏度易受温度的影响,在高性能应用中需进行必要的温度补偿。文中设计针对课题组研制的VA100F3自旋阀巨磁阻传感器灵敏度的温度特性,采用CMOS温度传感器来采集温度信号,并通过模数转换器转变为控制信号,进而调节可调增益放大器的增益,以补偿温度变化所导致的GMR传感器灵敏度的变化,巨磁阻传感器温度补偿前后的灵敏度温度系数分别是2 498 ppm/℃和678ppm/℃,达到了较好的补偿效果。系统各电路均基于CSMC 0.5μm Mix-Signal工艺进行设计,可以实现单芯片集成。
[Abstract]:Giant magnetoresistive sensor (GMR) is characterized by high sensitivity, easy miniaturization, low energy consumption and wide application prospects. However, the sensitivity of GMR is easily affected by temperature, which requires necessary temperature compensation in high performance applications. In this paper, according to the temperature characteristic of the sensitivity of VA100F3 spin-valve giant magnetoresistive sensor developed by our research group, the temperature signal is collected by CMOS temperature sensor and converted into control signal by A / D converter. Furthermore, the gain of the tunable gain amplifier is adjusted to compensate for the change of the sensitivity of the GMR sensor caused by the change of temperature. The sensitivity temperature coefficient of the GMR sensor before and after temperature compensation is 2 498 ppm/ 鈩，
本文编号：2301748
[Abstract]:Giant magnetoresistive sensor (GMR) is characterized by high sensitivity, easy miniaturization, low energy consumption and wide application prospects. However, the sensitivity of GMR is easily affected by temperature, which requires necessary temperature compensation in high performance applications. In this paper, according to the temperature characteristic of the sensitivity of VA100F3 spin-valve giant magnetoresistive sensor developed by our research group, the temperature signal is collected by CMOS temperature sensor and converted into control signal by A / D converter. Furthermore, the gain of the tunable gain amplifier is adjusted to compensate for the change of the sensitivity of the GMR sensor caused by the change of temperature. The sensitivity temperature coefficient of the GMR sensor before and after temperature compensation is 2 498 ppm/ 鈩，
本文编号：2301748
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