This paper study some question about hardware design for automatic temperature control system composed of singe chip microcomputer.

本文研究了单片机控制的燃气热水器水温自动调节系统硬件设计的有关问题。

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Signal demodulation of automatic block with audio frequency shift modulated track circuits was implemented with phase-locked loop (PLL) technique and a singe chip microcomputer.

利用锁相环(LL)窄带跟踪特性，与单片机结合，实现自动闭塞系统移频信号解调。

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