Adopt IGBT frequency conversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.

采用德国西门子IGBT变频，电压反馈串联谐振电路。变换效率高达97.5%以上。

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IPM that has been widely used in the field of frequency conversion is one of the power integrate circuit.

变频产品中普遍使用的智能功率模块IPM是电力集成电路的一种。

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This paper presents a new type of low noise frequency conversion circuit based on the research of phase noise conception, generation as well as relativity measurement method.

本文在对相位噪声的概念、产生及其相关测量方法研究的基础上，设计出一种低噪声频率变换电路。

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