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。
Two signal processing methods, one based on analog filters, the other based on digital lock-in amplifying technique, are developed and analyzed.
根据环路滤波器传递函数以及单环锁相系统的传递函数，计算出环路滤波器的各个参数，并介绍了环路带宽的选择。
According to transfer functions of the loop filter and the single phase locked loop system, it figures out the loop filters parameters, and introduces the selection of loop bandwidth.
由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
Due to the frequency pulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.
本文提出一种简单的跟踪滤波器电路，该电路可用于多普勒雷达，主要由开关式带通滤波器和锁相环组成。
This paper presents a simple tracking filter circuit, which is applicable to Doppler radar sets and consists mainly of a switched bandpass filter and a phase-locked loop.
本文讨论的全数字锁相环包括过零检测器和环路滤波器。
This paper discusses an all digital phase-locked loop with a zero-crossing detector and a loop filter.
描述了基于AT89C52单片机、锁相环和开关电容滤波器的正交信号发生器的设计和实现方法。
The design and implementation of quadrature waveform generator are described based on the AT89C52, phase-locked loop(PLL) and switched-capacitor filter(SCF).
前者在常规的采用电压外环、电流内环的双闭环控制基础上，搭建数字锁相环、数字滤波器。
Digital PLL and digital filter are built based on conventional double closed-loop control which contains voltage loop and current loop.
对锁相环的环路滤波器的设计方法进行了深入研究，给出了一种环路滤波器设计方法，该设计方法与现有设计方法相比具有较明显的优点。
The paper analyzes the design method of passive loop filter thoroughly, and presents a effective design method. The method has obvious advantage comparing to the design method in existence.
本文先介绍了锁相环的工作原理，环路滤波器的设计并对相位噪声的理论进行了阐述。
In this article, PLL theory, design of loop filter and phase noise theory are introduced at first.
由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking.
由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking.
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