频率调制不允许静电干扰混入。
本文研究了电反馈光发射机的频率调制特性。
The performance for the frequency modulation of electrical feedback optical transmitters is presented.
同时清楚地展示了非线性调频信号的频率调制规律。
The algorithm clearly displays the frequency modulation law of the nonlinear frequency modulation chirp signals at the same time.
实现了利用工控机自动进行频率调制参数测试的方法。
A solution of automatic testing for frequency modulation parameter by industrial control computer is realized.
提出了一种用于视网膜修复的脉冲频率调制电路结构。
A pulse frequency modulation (PFM) circuit for retinal prosthesis, which generates electrical pulses with frequency proportional to the intensity of incident light, is presented.
之后阐述了脉冲宽度调制和脉冲频率调制的工作原理。
Then the principle of Pulse Width Modulation and Pulse Frequency Modulation is analyzed in detail.
基于调制域分析，设计了电子产品频率调制参数测试方法。
Based on modulation domain analysis, a frequency modulation parameter testing method is proposed.
脉冲频率调制又包括了两种方式，即等宽pfm和SWFM。
The PFM technology includes two kinds modes: constant width PFM and SWFM.
为了获得足够的带宽，雷达采用一种非规则频率调制的波形。
In order to obtain enough bandwidth, HF radars use an irregularly frequency modulated waveform.
简要地说明了磁编码器在FMS(频率调制系统)中的应用。
A brief description on the application of the encode in Frequency Modulation Systems (FMS) is given.
频率调制：载波的频率依照调校讯号的瞬时值而改变的一种调制。
Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.
探讨了混沌频率调制技术在开关变换器中抑制电磁干扰的实际效果。
The paper presents the effectiveness of EMI suppression of switching converters with a chaotic frequency modulation scheme (CFMS).
本发明提供了一种结构，其中振幅调制模式和频率调制模式被切换。
The present invention provides a structure in which an amplitude-modulation mode and a frequency-modulation mode are switched.
伪码调相-载波调频复合信号的识别特征包括伪码特征和频率调制特征。
The features of pseudo code PM-carrier FM combined signal include the pseudo code and the modulation frequency.
通过适当调节两光束的频率调制幅度，可有效地实现克尔效应误差的消除。
Through proper adjustment to frequency modulation amplitude, the Kerr-effect-induced bias can be effectively reduced.
设计并研制了一套基于光反馈效应的直接频率调制激光二极管光电探测系统。
An optoelectronic detection system based on the optical feedback effect in a direct frequency modulated laser diode is developed.
7年的使用实践表明，直流脉动电压频率调制技术对抑制声谐振现象十分有效。
The7years 'applicable practices indicate that the frequency modulation technology with dc bus voltage ripples is very effective to suppress acoustic resonances.
研制了基于电化学频率调制(efm)技术的测试系统，能够实现EFM测试。
A measurement system based on electrochemical frequency modulation (EFM) technique was developed, which could implement EFM measurement.
对载波中的信息进行压缩的编码方式可以是载波或周期的频率调制或振幅调制。
The coding used to impress information on the wave can be a function of the frequency (the number of waves or cycles per second) or amplitude of the waves or cycles.
在脉宽、频率调制下，实现对流量、压力的控制，也可作快速开启，关断使用。
In the pulse width, frequency modulation, the realization of the flow, pressure control, it can be quickly opened, the use of turn-off.
本发明可替代地具体实施为频率调制雷达系统，其每组信号包括调制图案的序列。
The invention can alternatively be embodied in a frequency modulated radar system, for which each set of signals comprises a sequence of modulation patterns.
对采用方波频率调制数字闭环谐振型光纤陀螺中克尔效应的影响进行了深入的理论分析。
The influence of Kerr effect to close-loop digital resonator fiber optic gyroscope based on square-wave frequency modulation was analyzed in theory.
设计了统计直方图数据处理方案，按照正态分布的特性找出了寄生频率调制的标准偏差。
Statistics histogram data processing scheme is designed. Standard deviation of frequency modulation is found out according to normal distribution characteristics.
对三波道干涉仪测向结果不受幅度调制和频率调制（相位调制）的影响进行了数学分析。
We also analysed the influence of amplitude modulation and frequency (or phase ) modulation on Interferometer Direction Finder.
线性调频连续波雷达是一种通过对连续波进行频率调制来获得距离与速度信息的雷达体制。
LFMCW (Linear frequency Modulation continuous wave) radar is a radar system which can get the information of range and velocity through modulating the frequency of continuous wave.
电离层频率调制导致地表面杂波的多谱勒展宽，极大地限制了高频天波雷达的目标探测性能。
Ionospheric frequency modulation causes spreading of the surface clutter in Doppler domain which greatly limits the detection performance of HF sky-wave radars.
它在重载下工作于电流控制模式，轻载下工作于脉冲频率调制(PF M)模式来降低功耗。
It operates both in current mode at high output load and in pulse frequency modulation (PFM) at light load to reduce the power dissipation.
从气动声学理论出发，探讨了贯流式风机气动噪声机理及不等节距叶片频率调制降噪的机理。
Based on the theory of airacoutics, the mechanism of denoising of cross_flow fan and the modulation of unequal spaced blades is discussed.
从气动声学理论出发，探讨了贯流式风机气动噪声机理及不等节距叶片频率调制降噪的机理。
Based on the theory of airacoutics, the mechanism of denoising of cross_flow fan and the modulation of unequal spaced blades is discussed.
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