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 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。
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 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。
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。
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。
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。
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。
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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