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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. 发明申请

WO2007048007A3 WIDEBAND CIRCUITS AND METHODS 审中-公开
公开(公告)号：WO2007048007A3
公开(公告)日：2007-04-26
申请号：PCT/US2006/041187
申请日：2006-10-20
申请人： WILINX CORPORATION , BAGHERI, Mahdi , MIRZAEI, Ahmad , BAGHERI, Rahim , ROSTAMI, Edris , KOMIJANI, Abbas , DJAFARI, Masoud
发明人： BAGHERI, Mahdi , MIRZAEI, Ahmad , BAGHERI, Rahim , ROSTAMI, Edris , KOMIJANI, Abbas , DJAFARI, Masoud
IPC分类号： H03F3/191
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.

4. 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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