从模拟结果可知，由于电压外回路的快速直流链稳压控制，使得负载电流回授电路可予以去除来降低成本。

The simulation demonstrates that the load current feed-forward term can be removed to cut the cost because of the fast DC-link voltage regulation.

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文中还对具有镜频回授的单道性混频器电路提出了简明的分析方法。

Then, analysis and evaluation of various circuits for microwave mixers are given.

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