Low noise, high linearity RF front end circuit is the key of the whole RF receiver system design.

低噪声、高线性度的射频前端设计是整个射频接收机系统电路设计中的关键。

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The front end in a digital broadcasting receiver means the part of circuit that converting RF analog signal to baseband digital data stream.

数字广播接收机前端电路指接收机中完成从射频到基带转换的部分，是决定接收机性能指标的关键部分。

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The subjects come from the Institute of "broadband shortwave receiver", the author of which is responsible for part of the receiver RF front-end development.

课题来源于本学院“宽带短波接收机”项目，笔者负责其中接收机射频前端部分的研制。

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