公开(公告)号：US20080074187A1

公开(公告)日：2008-03-27

申请号：US11526855

申请日：2006-09-25

申请人： Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

发明人： Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F1/56 ,  H03F3/19 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45316 ,  H03F2203/45332 ,  H03F2203/45506 ,  H03F2203/45616 ,  H03F2203/45704 ,  H03F2203/45726 ,  H03H7/38

摘要： In one embodiment, an amplifier circuit has at least one branch and current-source circuitry providing a tail current to the branch, which has at least one load tank, at least one input transistor coupled to the load tank, and variable-impedance circuitry coupled between an input node of the amplifier circuit and the gate of the input transistor. The transconductance of the input transistor can be altered to achieve two or more different gain settings for the amplifier circuit. The variable-impedance circuitry can be controlled to contribute any one of at least two different levels of impedance to the overall input impedance of the amplifier circuit. If the transconductance of the input transistor is reduced, then the variable-impedance circuitry can increase the level of impedance contributed to the overall input impedance of the amplifier circuit such that the overall input impedance of the amplifier circuit remains substantially unchanged.

公开(公告)号：US07382189B2

公开(公告)日：2008-06-03

申请号：US11526855

申请日：2006-09-25

申请人： Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

发明人： Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

IPC分类号： H03F3/45

CPC分类号： H03F3/45188 ,  H03F1/56 ,  H03F3/19 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45316 ,  H03F2203/45332 ,  H03F2203/45506 ,  H03F2203/45616 ,  H03F2203/45704 ,  H03F2203/45726 ,  H03H7/38

摘要： In one embodiment, an amplifier circuit has at least one branch and current-source circuitry providing a tail current to the branch, which has at least one load tank, at least one input transistor coupled to the load tank, and variable-impedance circuitry coupled between an input node of the amplifier circuit and the gate of the input transistor. The transconductance of the input transistor can be altered to achieve two or more different gain settings for the amplifier circuit. The variable-impedance circuitry can be controlled to contribute any one of at least two different levels of impedance to the overall input impedance of the amplifier circuit. If the transconductance of the input transistor is reduced, then the variable-impedance circuitry can increase the level of impedance contributed to the overall input impedance of the amplifier circuit such that the overall input impedance of the amplifier circuit remains substantially unchanged.

摘要翻译： 在一个实施例中，放大器电路具有至少一个分支和电流源电路，其向分支提供尾电流，该分支具有至少一个负载箱，耦合到负载箱的至少一个输入晶体管和耦合到可变阻抗电路 在放大器电路的输入节点和输入晶体管的栅极之间。 可以改变输入晶体管的跨导以实现放大器电路的两个或多个不同的增益设置。 可控制可变阻抗电路可以对放大器电路的整个输入阻抗提供至少两个不同等级的阻抗中的任何一个。 如果输入晶体管的跨导减小，则可变阻抗电路可以增加对放大器电路的总体输入阻抗贡献的阻抗水平，使得放大器电路的总体输入阻抗基本上保持不变。

公开(公告)号：US07688130B2

公开(公告)日：2010-03-30

申请号：US11865368

申请日：2007-10-01

申请人： Shaorui Li ,  Jinghong Chen ,  Lawrence Rigge

发明人： Shaorui Li ,  Jinghong Chen ,  Lawrence Rigge

IPC分类号： G06F7/44

CPC分类号： H03F3/45197 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03F2203/45488

摘要： A passive mixer includes a transconductance amplifier having a source degeneration capacitance. The transconductance amplifier has an input for receiving an input signal and an output for outputting a current signal. A multiplier is provided for mixing a local oscillator signal with the current signal so as to provide an output signal at an output of the passive mixer. A capacitive load is connected to the output of the passive mixer.

摘要翻译： 无源混频器包括具有源极退化电容的跨导放大器。 跨导放大器具有用于接收输入信号的输入和用于输出电流信号的输出。 提供了一个乘法器，用于将本地振荡器信号与当前信号混频，以便在无源混频器的输出处提供输出信号。 电容负载连接到无源混频器的输出端。

公开(公告)号：US20140184319A1

公开(公告)日：2014-07-03

申请号：US14115308

申请日：2012-04-04

申请人： Gianluigi De Geronimo ,  Shaorui Li

发明人： Gianluigi De Geronimo ,  Shaorui Li

IPC分类号： H03H1/00

CPC分类号： H03H1/0007 ,  H03F1/34 ,  H03F3/211 ,  H03F3/70 ,  H03F2200/144 ,  H03F2200/408 ,  H03H11/1217

摘要： An analog filter is presented that comprises a chain of filter stages, a feedback resistor for providing a negative feedback, and a feedback capacitor for providing a positive feedback. Each filter stage has an input node and an output node. The output node of a filter stage is connected to the input node of an immediately succeeding filter stage through a resistor. The feedback resistor has a first end connected to the output node of the last filter stage along the chain of filter stages, and a second end connected to the input node of a first preceding filter stage. The feedback capacitor has a first end connected to the output node of one of the chain of filter stages, and a second end connected to the input node of a second preceding filter stage.

摘要翻译： 提出了一种模拟滤波器，其包括一系列滤波器级，用于提供负反馈的反馈电阻器和用于提供正反馈的反馈电容器。 每个滤波器级具有输入节点和输出节点。 滤波器级的输出节点通过电阻连接到紧随其后的滤波级的输入节点。 反馈电阻器具有连接到滤波器级链的最后滤波器级的输出节点的第一端，以及连接到第一先前滤波级的输入节点的第二端。 反馈电容器具有连接到滤波器级链中的一个的输出节点的第一端和连接到第二在前滤波器级的输入节点的第二端。

公开(公告)号：US09071219B2

公开(公告)日：2015-06-30

申请号：US14115308

申请日：2012-04-04

申请人： Gianluigi De Geronimo ,  Shaorui Li

发明人： Gianluigi De Geronimo ,  Shaorui Li

IPC分类号： H03K5/00 ,  H03H1/00 ,  H03F1/34 ,  H03F3/21 ,  H03F3/70 ,  H03H11/12

CPC分类号： H03H1/0007 ,  H03F1/34 ,  H03F3/211 ,  H03F3/70 ,  H03F2200/144 ,  H03F2200/408 ,  H03H11/1217

摘要： An analog filter is presented that comprises a chain of filter stages, a feedback resistor for providing a negative feedback, and a feedback capacitor for providing a positive feedback. Each filter stage has an input node and an output node. The output node of a filter stage is connected to the input node of an immediately succeeding filter stage through a resistor. The feedback resistor has a first end connected to the output node of the last filter stage along the chain of filter stages, and a second end connected to the input node of a first preceding filter stage. The feedback capacitor has a first end connected to the output node of one of the chain of filter stages, and a second end connected to the input node of a second preceding filter stage.

摘要翻译： 提出了一种模拟滤波器，其包括一系列滤波器级，用于提供负反馈的反馈电阻器以及用于提供正反馈的反馈电容器。 每个滤波器级具有输入节点和输出节点。 滤波器级的输出节点通过电阻连接到紧随其后的滤波级的输入节点。 反馈电阻器具有连接到滤波器级链的最后滤波器级的输出节点的第一端，以及连接到第一先前滤波级的输入节点的第二端。 反馈电容器具有连接到滤波器级链中的一个的输出节点的第一端和连接到第二在前滤波器级的输入节点的第二端。

公开(公告)号：US07639069B2

公开(公告)日：2009-12-29

申请号：US12151699

申请日：2008-05-08

申请人： Shaorui Li ,  John Thomas Bayruns

发明人： Shaorui Li ,  John Thomas Bayruns

IPC分类号： H03B1/00

CPC分类号： H03H11/1291 ,  H03H11/04

摘要： The invention provides a system for providing tunable balanced loss compensation in an electronic filter. Tunable balanced loss compensation is provided by using cross-connected balanced transconductors and self-connected balanced transconductors. The cross-connected balanced transconductors and the self-connected transconductors compensate the unbalanced loss across the electronic filter. The self-connected balanced transconductors compensate the balanced loss across the electronic filter. Further, the cross-connected and the self-connected balanced transconductors are tunable by adjusting the values of their transconductances, thereby providing tunable balanced loss compensation.

摘要翻译： 本发明提供一种用于在电子滤波器中提供可调平衡损耗补偿的系统。 可调平衡损耗补偿通过使用交叉连接的平衡跨导和自连接平衡跨导器来提供。 交叉连接的平衡跨导体和自连接的跨导体补偿电子滤波器上的不平衡损耗。 自连接平衡跨导器补偿电子滤波器的平衡损耗。 此外，交叉连接和自连接的平衡跨导体可以通过调整它们的跨导值来调节，从而提供可调谐的平衡损耗补偿。

公开(公告)号：US20080211573A1

公开(公告)日：2008-09-04

申请号：US12151699

申请日：2008-05-08

申请人： Shaorui Li ,  John Thomas Bayruns

发明人： Shaorui Li ,  John Thomas Bayruns

IPC分类号： H04B1/10

CPC分类号： H03H11/1291 ,  H03H11/04

摘要： The invention provides a system for providing tunable balanced loss compensation in an electronic filter. Tunable balanced loss compensation is provided by using cross-connected balanced transconductors and self-connected balanced transconductors. The cross-connected balanced transconductors and the self-connected transconductors compensate the unbalanced loss across the electronic filter. The self-connected balanced transconductors compensate the balanced loss across the electronic filter. Further, the cross-connected and the self-connected balanced transconductors are tunable by adjusting the values of their transconductances, thereby providing tunable balanced loss compensation.

摘要翻译： 本发明提供一种用于在电子滤波器中提供可调平衡损耗补偿的系统。 可调平衡损耗补偿通过使用交叉连接的平衡跨导和自连接平衡跨导器来提供。 交叉连接的平衡跨导体和自连接的跨导体补偿电子滤波器上的不平衡损耗。 自连接平衡跨导器补偿电子滤波器的平衡损耗。 此外，交叉连接和自连接的平衡跨导体可以通过调整它们的跨导值来调节，从而提供可调谐的平衡损耗补偿。