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公开(公告)号：EP1927188B1
公开(公告)日：2010-02-24
申请号：EP06794570.9
申请日：2006-09-25
申请人： GloNav Limited
IPC分类号： H03H11/12
CPC分类号： H03H11/1213
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公开(公告)号：EP1929639A1
公开(公告)日：2008-06-11
申请号：EP06779558.3
申请日：2006-09-26
申请人： GloNav Limited
CPC分类号： H03F1/26 , H03F1/22 , H03F3/195 , H03F2200/111 , H03F2200/294 , H03F2200/372 , H03F2200/42 , H03F2200/48 , H03F2200/54 , H04B1/18 , H04B1/3805
摘要： A radio-frequency receiver for, e.g., receiving GPS signals in a cellular telephone has an input, a first gain stage in the form of a linear low noise amplifier with voltage- voltage feedback and a resonant load, and a second gain stage based on a common source input transconductor. Associated with the input and the first gain stage is a filter comprising a notch filter part for rejecting an interfering signal, e.g. a cell phone transmitter signal, and, connected between the parallel resonant circuit and the input, a series capacitance which, in combination with the inductor of the parallel-resonant circuit, forms a series-resonant circuit to provide a low impedance path at a wanted signal frequency.
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公开(公告)号：EP1927188A2
公开(公告)日：2008-06-04
申请号：EP06794570.9
申请日：2006-09-25
申请人： GloNav Limited
IPC分类号： H03H11/12
CPC分类号： H03H11/1213
摘要： The present invention addresses a need for reducing the power consumption in a baseband filter used in a front-end wireless receiver while providing the necessary linearity. In particular, relatively high linearity can be obtained with lower power consumption than has heretofore been the case. This is achieved in embodiments of the invention using an optimized single-branch fully differential structure which operates as a 'composite' source- follower (when using CMOS devices) with an ideal unitary dc gain. A positive feedback internal to the source follower allows one to synthesize two complex-poles.
摘要翻译： 本发明解决了在提供必要的线性度的同时降低前端无线接收器中使用的基带滤波器中的功耗的需求。 特别地，与迄今为止的情况相比，以较低的功耗可以获得较高的线性度。 这在本发明的实施例中使用优化的单分支全差分结构来实现，该结构作为具有理想单位直流增益的“复合”源极跟随器（当使用CMOS器件时）操作。 源跟随器内部的正反馈允许合成两个复数极点。
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