【摘要】 采用硅片三端磁阻传感器制成的数字显示转速表，具有电路结构简单、运行可靠及磁传感器所具有的非接触等特点。阐述了该转速表的工作原理及电路的组成。该硅磁阻传感器运用常规硅平面工艺技术作成，这为该类磁阻传感器的推广、运用与发展提供了更为广阔的前景。更多还原

【Abstract】 A digital tachometer using a three points magnetic- resistance sensor of silicon is studied, It has the features of simple in structure, reliability and no touch,The basic principle and the circuit design of this tachometer are described, The magnetic-resistance sensor is made with standard silicon-planar technology, This affords broad prospects of spreading,application and development for this magnetic-resistance sensor type,更多还原