Phase locked loop technique offers a way to resolve this problem.

锁相式频率合成技术提供了解决这一问题的思路。

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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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In the system, we adopt a balance channel frequency offset structure, phase locked IF tracking technique and opened loop precorrection.

在系统结构上采用了平衡通道频率补偿技术、中频锁相跟踪技术和开环预校正技术。

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In the system, we adopt a balance channel frequency offset structure, phase locked IF tracking technique and opened loop precorrection.

在系统结构上采用了平衡通道频率补偿技术、中频锁相跟踪技术和开环预校正技术。

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