介绍新型WXJ25型微电子相敏轨道电路接收器的工作原理，技术条件及维修标准。
The working principle, technical specification and maintenance standard of the new WXJ25 phase-sensitive track circuit receiver were introduced in this paper.
设计的主要内容包括：相敏信号解调电路的分析与设计；
The main elements of the design include: phase-sensitive signal demodulation circuit analysis and design;
本文简单介绍了LVDT、相敏检波器和三角波发生器的工作原理及自行设计的一种实用的LVDT相敏检波读出电路。
The principles of the LVDT, the phase-sensitive detector and the triangular wave generator are briefly illustrated in this paper. A practical LVDT readout.
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