The methods of harmonic suppression were introduced, such as adopting passive power filter (PPF), active power filter (APF), hybrid filter and harmonic protective device (HPD).
介绍了谐波治理的方法，即采用无源滤波器、有源滤波器、混合型滤波器及谐波保护器，举例说明了谐波保护器的应用。
A novel structure of parallel hybrid active power filter is proposed. lt consists of Passive filter (LC) and active power filter (APF).
采用了一种新型混合型有源滤波器的结构，它由LC无源滤波器和有源电力滤波器(APF)共同组成。
This paper gives the design and experimental results of low noise NPLL frequency synthesizer and concludes that the passive loop filter is more suitable for low noise design than active loop filter.
介绍低相噪NPLL频率综合器的设计及实验结果。提出用无源环路滤波器比用有源环路滤波器更好，可获得低相噪设计。
This paper presents the performance analysis of a hybrid filter composed of a passive and active filters connected in series.
对由无源滤波器和有源滤波器串联而成的混合型滤波器的性能进行了分析。
As a new filtering device used in single phase circuit, hybrid type series active power filter is a combined system of shunt passive filter and series active filter.
串联混合型单相电力有源滤波器是串联有源滤波器与并联无源滤波器组合而成的单相电路新型滤波装置。
These modes include centralized elimination, special transformer on the spot , passive filter on the spot and active filter on the spot. The passive filter mode is mature and deserves to popularize.
谐波治理主要有电网集中治理模式、特殊变压器就地治理模式、改变整流变压器接线、无源滤波装置就地治理模式及有源滤波装置就地治理模式，其中无源滤波模式较为成熟，值得推广。
The filter is composed of an active filter (AF) and a passive filter (PF).
滤波器是由有源滤波器(AF)和无源滤波器(PF)串联组成。
Noise which comes from both active and passive circuit element in loop filter will deteriorate phase noise of output signal.
环路滤波器中的有源和无源器件均有噪声产生，此类噪声会叠加在输出信号上，从而恶化输出信号的相位噪声。
A design methodology of active-RC complex filter is proposed in this paper, with which one can determine the parameters of passive components quickly.
提出了一种采用有源r C滤波器实现复数滤波器时可快速确定无源器件参数值的设计方法。
It is not only different from the traditional passive filter way but also different from the existing active filter way.
它既有别于传统的无源滤波方式，也有别于现有的有源滤波方式。
At present large capacity and demand compensation for detailed areas is generally the use of active plus passive hybrid, that is, a large-capacity passive filter compensation, active fine-tuning.
目前在容量大且要求补偿细致的地方一般使用有源加无源混合型，即无源进行大容量的滤波补偿，有源进行微调。
Governing harmonic with Active Power Filter has better compensation performances than with Passive Filter.
采用有源电力滤波器治理谐波比无源滤波器有更优越的补偿性。
Upon the low power design consideration, a hybrid active-passive loop filter is employed and the signal summing block is removed by using discrete-time differentiation technique.
基于低功耗设计考虑，调制器采用有源-无源混合型环路滤波器，并通过离散时间微分技术移除信号求和模块。
Upon the low power design consideration, a hybrid active-passive loop filter is employed and the signal summing block is removed by using discrete-time differentiation technique.
基于低功耗设计考虑，调制器采用有源-无源混合型环路滤波器，并通过离散时间微分技术移除信号求和模块。
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