The digital lock-in technique is used to rather extract the effective signal from the noise and reduce the measurement error.
采用数字锁相技术从噪声中提取有效信号，以减小测量误差。
Two signal processing methods, one based on analog filters, the other based on digital lock-in amplifying technique, are developed and analyzed.
设计了基于模拟滤波器和基于数字锁相放大技术的两种红外气体传感器的信号处理方法。
A method of implementing digital lock in amplifier with DSP (digital signal processor) and sampling ADC (analog digital converter) is discussed.
探讨了用DSP(数字信号处理器)和采样adc(模数转换器)实现数字锁定放大器的一种方法。
A measurement system for gas dynamic concentrations based on TDLAS was constructed by using an auto-balanced photo receiver and a digital lock-in amplifier.
基于自平衡激光接收器和数字锁定放大器构造了TDLAS汽车尾气动态浓度测量系统。
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。
The primary factor affecting fast phase lock is analyzed by using MATLAB. Then a fast all digital phase locked loop with a high precision automatic modulus control is proposed.
应用MATLAB分析了影响锁相环快速锁定的主要因素，提出了一种具有高精度自动变模控制的快速全数字锁相环。
Digital phase lock loop is a key part of the digital demodulator.
数字锁相环是数字解调器的关键部件。
Digital phase lock loops are widely adapted in nowadays communication systems. However, it is difficult to design the loop parameter precisely.
数字锁相环在实际通信系统中应用广泛，但其精确的环路参数设计比较困难。
Dsm dsp frequency feedback controller is made of dsp shift frequency and dsp automatism digital filter. dsp software searches howl point and lock it by locale condition with no adjusting.
dsp数字移频反馈控制器，由dsp数字移频-dsp自动数字滤波器组成，根据现场环境dsp软件自动寻找啸叫点并锁定，无需人工调节。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。
This paper introduces the VHDL top down design method including scheme determination, hierarchy division, and VHDL application taking a digital code lock design for example.
文中以数字密码锁的设计为实例，从方案的确定，各阶层的划分，VHDL的应用，介绍了VHDL自顶向下的设计方法。
Finally, the performances of this digital demodulator are tested through the simulation of BER and the system joint lock-time, and a carrier recovery module is implemented in FPGA.
最后，通过对误码性能和系统联合锁定时间进行仿真，验证了数字解调器性能，并在FPGA中实现了载波恢复模块。
Digital phase lock loop base on fuzzy logical control, which is used to recover carrier in communication system.
基于模糊逻辑控制的数字锁相环，用于通信系统中的载波恢复。
It's controlled by microcomputer with touching panel and digital display. It's direct driven by brushless motor without pollution. The electronic lock lid is designed for safe operation.
产品说明微机控制，无刷电机驱动，数字显示，触摸面板，配有电子门锁，设有门盖自锁，超速等保护功能。
One-Key opening function(Passage Mode) :Press any digital key to open the lock.
可设定绿色通道功能：按任意数字键即可开门；
The Digital Phase Lock Loop(DPLL)is the core of the coherent demodulation.
数字锁相环路（DPLL）是数字相干解调技术的核心。
A new kind of electronic and mechanical antitheft lock using digital code based on the technologies of PIC single-chip microcomputer, serial communication and wireless data transmission is introduced.
本文介绍了基于PIC单片机、串行通信技术和无线数据传输的新型数码防盗电子机械锁的设计。
The use of digital password lock incarnates the improvements of people's consumption levels, security awareness and scientific levels, and avoid carrying even lost keys trouble.
数字密码锁的使用体现了人们消费水平、保安意识和科技水平的提高，而且避免了携带甚至丢失钥匙的麻烦。
At least 2~3years working experience in electronic design; experience in digital door lock is preferred;
至少2~3年电子设计工作经验；有智能电子锁经验者优先；
At least 2~3years working experience in electronic design; experience in digital door lock is preferred;
至少2~3年电子设计工作经验；有智能电子锁经验者优先；
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