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1. 发明申请

WO2007145615A1 WIDEBAND CIRCUITS AND METHODS 审中-公开
标题翻译：宽带电路和方法
公开(公告)号：WO2007145615A1
公开(公告)日：2007-12-21
申请号：PCT/US2006/022294
申请日：2006-06-08
申请人： WILINX, INC , ROSTAMI, Edris , BAGHERI, Rahim , DJAFARI, Masoud , MEHRNIA, Alireza
发明人： ROSTAMI, Edris , BAGHERI, Rahim , DJAFARI, Masoud , MEHRNIA, Alireza
IPC分类号： H03M1/06
CPC分类号： H03M1/0607
摘要： Embodiments of the present invention include circuits and methods for reducing DC Offset. In one embodiment the present invention includes storing DC offset on internal capacitances. In one embodiment, parallel stages are used to remove DC offset corresponding to different local oscillator frequencies. Embodiments of the invention further include changing the low cutoff frequency of the DC cancellation circuits for fast calibration. In a first state, a high pass filter may have a first low cutoff frequency, and in a second state the high pass filter may have a second cutoff frequency lower than the first low cutoff frequency. The present invention also includes a variable gain amplifier with reduced DC offset. In one embodiment, the present invention includes a novel wideband attenuator.
摘要翻译：本发明的实施例包括用于减小DC偏移的电路和方法。在一个实施例中，本发明包括在内部电容上存储DC偏移。在一个实施例中，并行级用于去除对应于不同本地振荡器频率的DC偏移。本发明的实施例还包括改变用于快速校准的直流消除电路的低截止频率。在第一状态下，高通滤波器可以具有第一低截止频率，并且在第二状态下，高通滤波器可以具有低于第一低截止频率的第二截止频率。本发明还包括具有降低的DC偏移的可变增益放大器。在一个实施例中，本发明包括一种新颖的宽带衰减器。

2. 发明申请

WO2007055748A3 MIXER CIRCUITS AND METHODS WITH IMPROVED SPECTRAL PURITY 审中-公开
公开(公告)号：WO2007055748A3
公开(公告)日：2007-05-18
申请号：PCT/US2006/024600
申请日：2006-06-26
申请人： WILINX, INC , ROSTAMI, Edris , BAGHERI, Rahim , DJAFARI, Masoud , KOMIJANI, Abbas
发明人： ROSTAMI, Edris , BAGHERI, Rahim , DJAFARI, Masoud , KOMIJANI, Abbas
IPC分类号： H03B21/00 , H04B1/18 , H04B1/26 , G06G7/16 , G06G7/12
摘要： Embodiments of the present invention include circuits and methods for improving the spectral purity of mixer circuits. In one embodiment the present invention includes mixer circuit including capacitances between sources of mixer transistors to reduce spectral impurity. In another embodiment, the present invention includes a mixer circuit including a bias circuit, the bias circuit comprising feedback loop to control the bias at the gate of mixer transistors.

3. 发明公开

EP1794891A1 HIGH FREQUENCY WIRELESS RECEIVER CIRCUITS AND METHODS 审中-公开
标题翻译：无线高频接收电路及程序
公开(公告)号：EP1794891A1
公开(公告)日：2007-06-13
申请号：EP05791608.2
申请日：2005-08-29
申请人： WiLinx, Inc. , Bagheri, Rahim , Djafari, Masoud , Atri, Mahnaz
发明人： BAGHERI, Rahim , DJAFARI, Masoud , ATRI, Mahnaz
IPC分类号： H04B1/04 , G06F7/44
CPC分类号： H03F3/193 , H03F2200/294 , H03F2200/372 , H04B1/18
摘要： Embodiments of the present invention include circuits for use in wireless receivers that provide wide band matching with improved gain and noise performance. In one embodiment, the present invention includes a wireless receiver comprising an antenna, a first transistor having a source coupled to the antenna, a second transistor having a gate coupled to the antenna and a network comprising a first terminal coupled to the antenna, a second terminal coupled to the source of the first transistor and a third terminal coupled to the gate of the second transistor, wherein the network has a transimpedance between the second and third terminals so that noise generated by the first transistor is differentially rejected by the system across a predetermined range of frequencies.

4. 发明申请

WO2006026497A1 HIGH FREQUENCY WIRELESS RECEIVER CIRCUITS AND METHODS 审中-公开
标题翻译：高频无线接收机电路及方法
公开(公告)号：WO2006026497A1
公开(公告)日：2006-03-09
申请号：PCT/US2005/030538
申请日：2005-08-29
申请人： WILINX INC. , BAGHERI, Rahim , DJAFARI, Masoud , ATRI, Mahnaz
发明人： BAGHERI, Rahim , DJAFARI, Masoud , ATRI, Mahnaz
IPC分类号： H04B1/04
CPC分类号： H03F3/193 , H03F2200/294 , H03F2200/372 , H04B1/18
摘要： Embodiments of the present invention include circuits for use in wireless receivers that provide wide band matching with improved gain and noise performance. In one embodiment, the present invention includes a wireless receiver comprising an antenna, a first transistor having a source coupled to the antenna, a second transistor having a gate coupled to the antenna and a network comprising a first terminal coupled to the antenna, a second terminal coupled to the source of the first transistor and a third terminal coupled to the gate of the second transistor, wherein the network has a transimpedance between the second and third terminals so that noise generated by the first transistor is differentially rejected by the system across a predetermined range of frequencies.
摘要翻译：本发明的实施例包括用于提供具有改善的增益和噪声性能的宽带匹配的无线接收机中的电路。在一个实施例中，本发明包括一种无线接收机，包括天线，第一晶体管，具有耦合到天线的源，第二晶体管，具有耦合到天线的栅极和包括耦合到天线的第一端子的网络，端子，耦合到第一晶体管的源极和耦合到第二晶体管的栅极的第三端子，其中网络在第二和第三端子之间具有跨阻抗，使得由第一晶体管产生的噪声被系统跨越预定的频率范围。

5. 发明公开

EP1946442A2 WIDEBAND CIRCUITS AND METHODS 有权
标题翻译：宽带，电路及程序
公开(公告)号：EP1946442A2
公开(公告)日：2008-07-23
申请号：EP06826418.3
申请日：2006-10-20
申请人： WiLinx, Inc.
发明人： BAGHERI, Mahdi , BAGHERI, Rahim , ROSTAMI, Edris , KOMIJANI, Abbas , MIRZAEI, Ahmad , DJAFARI, Masoud
IPC分类号： H03F3/191
CPC分类号： H03F1/48 , H03F3/191 , H03F3/45179 , H03F3/45475 , H03F2200/168 , H03F2200/36 , H03F2203/45302 , H03F2203/45318 , H03F2203/45342 , H03F2203/45354
摘要： Embodiments of the present invention include circuits and methods with wide bandwidths. In one embodiment, parasitic capacitances of the output of a first stage and the input of a second stage are included in a network. The output of the first stage is coupled to the input of the network, and the input of the second stage is coupled to an intermediate node of the network. In one embodiment, the parasitic capacitance of the second stage is the largest capacitance in the network. In another embodiment, passive networks are coupled to the outputs of a stage, and one or more current injection circuits may be used to extend the bandwidth of the circuit.

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