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。
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。
Guaranteed condition: If any invalid card is read, the circuit in the lock can still function properly with no damage.
保证条件：接触任何非法卡，锁内电路不会损坏，仍能正常使用。
Owing to the peculiarities of the PLC Ladder Logic graphic, there may well be the possibilities of the invalidation in the electric chain lock on the circuit.
由于该系列PL C解算梯形图流程的特殊性，容易引起控制电路中电气联锁环节的失效。
In this paper we discuss how it works about touch switch, to analyse and compare some typical touch switch circuits, to give a detector circuit on two-point 'touch-electronic lock.
本文讨论了触摸开关的工作原理，分析比较了几种典型的触摸开关单元电路，给出双点触摸式电子锁探头设计的一个方案。
The phase-lock technique is widely used in many fields, such as modulation and demodulation circuit and frequency synthesizer circuit.
锁相技术在调制和解调、频率合成电路等很多领域应用极其广泛。
Based on discussion on several common elevator door lock circuits with software, this paper points out some hidden peril of the accident in such circuits, and designs a circuit using PLC.
常见的电梯门锁安全电路中，门锁继电器在多种情况下都可能产生误动作，存在事故隐患。
For the signals are very weak, the lock-in amplifier is employed to extract the signals in the circuit design. It can inhabit the noise in the most and maximize the signal-to-noise.
在电路设计上采用锁相放大器来提取微弱信号，最大限度的抑制噪声，提高系统的信噪比。
This paper discusses the influence of mixer on the phase lock-loop (PLL) circuit of a local oscillator. In mixer, local signal is produced by the PLL circuit.
本文讨论了采用锁相环路作为本振信号的混频器对本振锁相环路的影响。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
The principle of phase lock loop and its application in the motor power-measuring system are introduced, furthermore the design and analysis of the circuit for constant speed control are provided.
介绍了摊铺机行驶控制系统的基本要求，以单边行驶回路为例探讨了其工作原理； 根据摊铺机对行驶速度的要求，分析了恒速控制技术，探讨了行驶系统控制方式。
The principle of phase lock loop and its application in the motor power-measuring system are introduced, furthermore the design and analysis of the circuit for constant speed control are provided.
介绍了摊铺机行驶控制系统的基本要求，以单边行驶回路为例探讨了其工作原理； 根据摊铺机对行驶速度的要求，分析了恒速控制技术，探讨了行驶系统控制方式。
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