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首页> 外文期刊>IEEE Transactions on Circuits and Systems. II, Express Briefs >Low-IF topologies for high-performance analog front ends of fullyintegrated receivers
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Low-IF topologies for high-performance analog front ends of fullyintegrated receivers

机译：低IF拓扑，用于全集成接收器的高性能模拟前端

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When it comes to integratability, the zero-intermediate frequencyn(IF) receiver is an alternative for the heterodyne or IF receiver. Innrecent years, the zero-IF receiver has been introduced in severalnapplications, but its performance cannot be compared to that of the IFnreceiver yet. This lower performance is closely related to its basebandnoperation, resulting in filter saturation and distortion, both caused bynDC-offsets and self-mixing at the inputs of the mixers. The low-IFnreceiver has a topology which is closely related to the zero-IFnreceiver, but it does not operate in the baseband, only near thenbaseband. The consequences are that, as for the zero-IF receiver, thenimplementation of a low-IF receiver can be done with a high degree ofnintegration, however, its performance can be better. In this paper, thenfundamental principles of the low-IF receiver topology are introduced.nDifferent low-IF receiver topologies are synthesized and fully analyzednin this paper. This is done by applying the complex signal technique-antechnique used in digital applications to the study of analog receivernfront ends
机译：当涉及到可集成性时，零中频n（IF）接收机是外差或IF接收机的替代方案。近年来，零中频接收器已经在多种应用中被引入，但是其性能尚不能与中频接收器相提并论。这种较低的性能与其基带操作密切相关，导致滤波器饱和和失真，这都是由直流偏移和混频器输入端的自混频引起的。低IFn接收器具有与零IFn接收器密切相关的拓扑，但是它不工作在基带中，仅在基带附近工作。结果是，对于零中频接收器，可以通过高度集成来实现低中频接收器，但是其性能会更好。本文介绍了低中频接收机拓扑结构的基本原理。本文对n种不同的低中频接收机拓扑结构进行了综合和充分的分析。这是通过将数字应用中使用的复杂信号技术用于模拟接收器前端来完成的。

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