This paper gives a detailed analysis of the principle of the phase lock circuit, one of the most important parts of the QF1052B Standard Signal Generator and provides some methods of checking it.

本文详细分析了QF1052B型标准信号发生器锁相环部分的基本组成及其工作原理，并提出了对此部分电路的检测方法。

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The digital realization of monostable circuit and extraction of bit-synchronous signal with digital phase lock loop are also introduced in detail.

对于其中的单稳态电路的数字化和数字锁相环提取位同步信号也进行了详细的设计说明。

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In the new scheme proposed, the phase lock loop is avoided and the digital logical circuit is used.

该方案利用信号自身的特性，采用数字逻辑设计，有效避免了性能不高的锁相环的使用。

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Rather than pay for the full fix itself, which requires a new circuit board for every affected lock, Onity has asked its hotel customers to cover the cost of those hardware replacements.

FORBES: Security Flaw In Common Keycard Locks Exploited In String Of Hotel Room Break-Ins

As communicated in the July 30 Franchise Weekly Update , a hacker claims to have compromised the Onity brand guestroom lock system with a device containing a circuit board with several wires attached.

FORBES: Lock Firm Onity Starts To Shell Out For Security Fixes To Hotels' Hackable Locks