公开(公告)号：US07132889B2

公开(公告)日：2006-11-07

申请号：US10920694

申请日：2004-08-18

申请人： John B. Groe ,  Michael Farias

发明人： John B. Groe ,  Michael Farias

IPC分类号： H03F3/45

CPC分类号： H03F3/45085 ,  H03F2203/45612

摘要： A translinear variable-gain amplifier. The translinear variable gain amplifier receives a differential input voltage and produces a differential output current having a selected gain. The amplifier comprises a buffer amplifier that receives the differential input voltage and produces a differential input current. The amplifier further comprises a translinear gain cell coupled to receive the differential input current and produce the differential output current. The gain cell includes a first adjustable bias source that operates to set a linear input range of the gain cell, and a second adjustable bias source that operates to set a gain value of the gain cell.

公开(公告)号：US06798290B2

公开(公告)日：2004-09-28

申请号：US10229327

申请日：2002-08-27

申请人： John B. Groe ,  Michael Farias

发明人： John B. Groe ,  Michael Farias

IPC分类号： H03F345

CPC分类号： H03F3/45085 ,  H03F2203/45612

摘要： A translinear variable-gain amplifier. The translinear variable gain amplifier receives a differential input voltage and produces a differential output current having a selected gain. The amplifier comprises a buffer amplifier that receives the differential input voltage and produces a differential input current. The amplifier further comprises a translinear gain cell coupled to receive the differential input current and produce the differential output current. The gain cell includes a first adjustable bias source that operates to set a linear input range of the gain cell, and a second adjustable bias source that operates to set a gain value of the gain cell.

摘要翻译： 一种跨线性可变增益放大器。 跨导线可变增益放大器接收差分输入电压并产生具有所选增益的差分输出电流。 放大器包括缓冲放大器，其接收差分输入电压并产生差分输入电流。 该放大器还包括耦合以接收差分输入电流并产生差分输出电流的跨线增益单元。 增益单元包括第一可调偏置源，其操作以设置增益单元的线性输入范围，以及第二可调偏置源，其操作以设置增益单元的增益值。

公开(公告)号：US06724235B2

公开(公告)日：2004-04-20

申请号：US10202502

申请日：2002-07-23

申请人： Damian Costa ,  John B. Groe ,  Michael Farias

发明人： Damian Costa ,  John B. Groe ,  Michael Farias

IPC分类号： H03K1714

CPC分类号： H03G1/0023 ,  H03F3/45085 ,  H03F3/45188 ,  H03F3/45672 ,  H03F2203/45702

摘要： A variable-gain BiCMOS transconductance amplifier (VGA). An NMOS differential pair amplifier with bipolar cascoding provides continuous gain control by adjustment of drain-source voltage to shift the NMOS differential pair from a saturation region operation and high gain to a triode operation and low gain. A simple control circuit is used in order to generate the desired exponential gain to linear control voltage characteristic that is stable over temperature and process. The shift from saturation to triode operation of the input NMOS differential pair simultaneously increases the input linearity as the gain is reduced.

摘要翻译： 可变增益BiCMOS跨导放大器（VGA）。 具有双极级级联的NMOS差分对放大器通过调整漏极 - 源极电压来提供连续增益控制，以将NMOS差分对从饱和区域操作和高增益移动到三极管操作和低增益。 使用简单的控制电路，以便产生对温度和过程稳定的线性控制电压特性所需的指数增益。 输入NMOS差分对的饱和至三极管工作的转变同时增加输入线性度，随着增益的减小。

公开(公告)号：US07489916B1

公开(公告)日：2009-02-10

申请号：US10454761

申请日：2003-06-04

申请人： Michael Farias ,  John Groe ,  Damian Costa

发明人： Michael Farias ,  John Groe ,  Damian Costa

IPC分类号： H04B1/26 ,  H04B15/00

CPC分类号： H04B1/30 ,  H03D7/145 ,  H03D7/1458 ,  H03D7/1491 ,  H03D7/165 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03D2200/0047

摘要： Direct down-conversion mixer. A direct down-conversion mixer is provided. The mixer comprises an LO switching pair coupled to receive an RF input signal and produce a down converted output signal. The mixer also comprises an integrator coupled to receive the output signal and produce an integrator output signal. The mixer also comprises a control circuit coupled to receive an input voltage and the integrator output signal to produce a control signal that is coupled to the LO switching pair.

摘要翻译： 直接下变频混频器 提供直接下变频混频器。 混频器包括耦合以接收RF输入信号并产生下变频输出信号的LO开关对。 混频器还包括被耦合以接收输出信号并产生积分器输出信号的积分器。 混频器还包括耦合以接收输入电压的控制电路和积分器输出信号，以产生耦合到LO开关对的控制信号。

公开(公告)号：US07164318B2

公开(公告)日：2007-01-16

申请号：US10928713

申请日：2004-08-26

申请人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

发明人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

IPC分类号： H03G3/30

CPC分类号： H03G1/0023 ,  H03F1/22 ,  H03F2200/294 ,  H03F2200/372

摘要： Continuous variable-gain low-noise amplifier. The amplifier continuously adjusts its gain between well-defined high and low values by using a cascode current-steering circuit to partition signal current between two different nodes of an output loading network. A shunt feedback network connected from an intermediate node of the loading network to the input provides negative feedback that linearizes the amplifier as its gain is decreased. The circuit degrades the noise figure at lower gains by varying the gain without directly dumping the signal current to the power supply. The circuit produces only small changes in input and output impedances and preserves an improved reverse-isolation cascode characteristic as the gain is controlled.

摘要翻译： 连续可变增益低噪声放大器。 放大器通过使用共源共栅电流转向电路在输出负载网络的两个不同节点之间分配信号电流，在明确的高电平和低电平值之间不断调整其增益。 从负载网络的中间节点连接到输入端的并联反馈网络提供负反馈，使得放大器随着其增益减小而线性化。 该电路通过改变增益而在较低增益下降低噪声系数，而不会将信号电流直接转储到电源。 该电路仅在输入和输出阻抗上产生小的变化，并且在增益受到控制时保持改进的反向隔离共源共栅特性。

公开(公告)号：US20050099232A1

公开(公告)日：2005-05-12

申请号：US10920694

申请日：2004-08-18

申请人： John Groe ,  Michael Farias

发明人： John Groe ,  Michael Farias

IPC分类号： H03F3/45

CPC分类号： H03F3/45085 ,  H03F2203/45612

摘要： A translinear variable-gain amplifier. The translinear variable gain amplifier receives a differential input voltage and produces a differential output current having a selected gain. The amplifier comprises a buffer amplifier that receives the differential input voltage and produces a differential input current. The amplifier further comprises a translinear gain cell coupled to receive the differential input current and produce the differential output current. The gain cell includes a first adjustable bias source that operates to set a linear input range of the gain cell, and a second adjustable bias source that operates to set a gain value of the gain cell.

摘要翻译： 一种跨线性可变增益放大器。 跨导线可变增益放大器接收差分输入电压并产生具有所选增益的差分输出电流。 放大器包括缓冲放大器，其接收差分输入电压并产生差分输入电流。 该放大器还包括耦合以接收差分输入电流并产生差分输出电流的跨线增益单元。 增益单元包括第一可调偏置源，其操作以设置增益单元的线性输入范围，以及第二可调偏置源，其操作以设置增益单元的增益值。

公开(公告)号：US20050134385A1

公开(公告)日：2005-06-23

申请号：US10928713

申请日：2004-08-26

申请人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

发明人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

IPC分类号： H03F1/22 ,  H03G1/00 ,  H03G3/30

CPC分类号： H03G1/0023 ,  H03F1/22 ,  H03F2200/294 ,  H03F2200/372

摘要： Continuous variable-gain low-noise amplifier. The amplifier continuously adjusts its gain between well-defined high and low values by using a cascode current-steering circuit to partition signal current between two different nodes of an output loading network. A shunt feedback network connected from an intermediate node of the loading network to the input provides negative feedback that linearizes the amplifier as its gain is decreased. The circuit degrades the noise figure at lower gains by varying the gain without directly dumping the signal current to the power supply. The circuit produces only small changes in input and output impedances and preserves an improved reverse-isolation cascode characteristic as the gain is controlled.

摘要翻译： 连续可变增益低噪声放大器。 放大器通过使用共源共栅电流转向电路在输出负载网络的两个不同节点之间分配信号电流，在明确的高电平和低电平值之间不断调整其增益。 从负载网络的中间节点连接到输入端的并联反馈网络提供负反馈，使得放大器随着其增益减小而线性化。 该电路通过改变增益而在较低增益下降低噪声系数，而不会将信号电流直接转储到电源。 该电路仅在输入和输出阻抗上产生小的变化，并且在增益受到控制时保持改进的反向隔离共源共栅特性。

公开(公告)号：US06801089B2

公开(公告)日：2004-10-05

申请号：US10139141

申请日：2002-05-03

申请人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

发明人： Damian Costa ,  Joseph Austin ,  John Groe ,  Michael Farias

IPC分类号： H03G310

CPC分类号： H03G1/0023 ,  H03F1/22 ,  H03F2200/294 ,  H03F2200/372

摘要： Continuous variable-gain low-noise amplifier. The amplifier continuously adjusts its gain between well-defined high and low values by using a cascode current-steering circuit to partition signal current between two different nodes of an output loading network. A shunt feedback network connected from an intermediate node of the loading network to the input provides negative feedback that linearizes the amplifier as its gain is decreased. The circuit degrades the noise figure at lower gains considerably less than conventional circuits by varying the gain without directly dumping the signal current to the power supply. The circuit produces only small changes in input and output impedances and preserves an improved reverse-isolation cascode characteristic as the gain is controlled.

摘要翻译： 连续可变增益低噪声放大器。 放大器通过使用共源共栅电流转向电路在输出负载网络的两个不同节点之间分配信号电流，在明确的高电平和低电平值之间不断调整其增益。 从负载网络的中间节点连接到输入端的并联反馈网络提供负反馈，使得放大器随着其增益的减小而线性化。 该电路通过改变增益而以比常规电路低得多的噪声系数降低噪声，而不会将信号电流直接转储到电源。 该电路仅在输入和输出阻抗上产生小的变化，并且在增益受到控制时保持改进的反向隔离共源共栅特性。