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1. 发明授权

US06724235B2 BiCMOS variable-gain transconductance amplifier 有权
标题翻译： BiCMOS可变增益跨导放大器
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。

2. 发明授权

US07974374B2 Multi-mode VCO for direct FM systems 有权
标题翻译：用于直接FM系统的多模式VCO
公开(公告)号：US07974374B2
公开(公告)日：2011-07-05
申请号：US11749538
申请日：2007-05-16
申请人： John B. Groe , Joe Austin , Damian Costa
发明人： John B. Groe , Joe Austin , Damian Costa
IPC分类号： H03D3/24
CPC分类号： H03C3/0925 , H03B5/1215 , H03B5/1228 , H03B5/1243 , H03B5/1253 , H03C3/0933 , H03C3/0958
摘要： Systems for multi-mode phase modulation are disclosed. Systems provide for direct modulation of a multi-mode voltage controlled oscillator (VCO). A fractional-N counter may be used in a phase-locked loop (PLL) to synthesize a radio frequency carrier signal. The multi-mode VCO may be characterized by a first frequency gain during operation in a first mode and by a second frequency gain during operation in a second mode where signals controlling the first and second operating modes are provided by a control circuit. The control circuit may include a switch to provide control signals to the VCO.
摘要翻译：公开了用于多模相位调制的系统。系统提供对多模式压控振荡器（VCO）的直接调制。在锁相环（PLL）中可以使用分数N计数器来合成射频载波信号。多模式VCO可以在第一模式下操作期间的第一频率增益和在控制第一和第二操作模式的信号由控制电路提供的第二模式中的第二频率增益来表征。控制电路可以包括向VCO提供控制信号的开关。

3. 发明申请

US20050134385A1 Continuous variable-gain low-noise amplifier 有权
标题翻译：连续可变增益低噪声放大器
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。

4. 发明授权

US06801089B2 Continuous variable-gain low-noise amplifier 有权
标题翻译：连续可变增益低噪声放大器
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。

5. 发明授权

US07489916B1 Direct down-conversion mixer architecture 有权
标题翻译：直接下变频混频器架构
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。

6. 发明授权

US07164318B2 Continuous variable-gain low-noise amplifier 有权
标题翻译：连续可变增益低噪声放大器
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。

7. 发明申请

US20080160946A1 Systems and Methods for Reducing Broadband Image Noise Through a Programmable Bandwidth RF Variable Gain Attenuator 有权
标题翻译：通过可编程带宽RF可变增益衰减器降低宽带图像噪声的系统和方法
公开(公告)号：US20080160946A1
公开(公告)日：2008-07-03
申请号：US11617054
申请日：2006-12-28
申请人： Jianhua Lu , Mark Santini , Weinan Gao , Mats Lindstrom , Damian Costa
发明人： Jianhua Lu , Mark Santini , Weinan Gao , Mats Lindstrom , Damian Costa
IPC分类号： H04B1/10 , H04B7/00
CPC分类号： H04B1/109 , H04B1/28
摘要： Systems for suppressing image noise are provided. In this regard, one embodiment includes a system for suppressing image noise comprising a low noise amplifier (LNA) configured to amplify a received RF signal, an RF variable gain attenuator with an image rejection filter with programmable bandwidth configured to suppress image noise and image interference, and an RF mixer configured to perform frequency translation.
摘要翻译：提供用于抑制图像噪声的系统。在这方面，一个实施例包括用于抑制图像噪声的系统，包括被配置为放大接收的RF信号的低噪声放大器（LNA），具有被配置为抑制图像噪声和图像干扰的具有可编程带宽的镜像抑制滤波器的RF可变增益衰减器以及被配置为执行频率转换的RF混合器。

8. 发明申请

US20080150641A1 Systems Involving Temperature Compensation of Voltage Controlled Oscillators 有权
标题翻译：涉及压控振荡器温度补偿的系统
公开(公告)号：US20080150641A1
公开(公告)日：2008-06-26
申请号：US11613216
申请日：2006-12-20
申请人： Damian Costa , William James Huff
发明人： Damian Costa , William James Huff
IPC分类号： H03L1/02 , H03L7/099
CPC分类号： H03L1/026 , H03L7/099
摘要： Systems involving temperature compensation of voltage controlled oscillators are provided. In this regard, a representative system incorporates: a voltage controlled oscillator (VCO) having a tuning port and a phase-locked loop (PLL); and a temperature dependent voltage source. The VCO selectively exhibits one of a coarse tuning mode in which the temperature dependent voltage source is electrically connected to the VCO tuning port, and a locked mode in which the temperature dependent voltage source is not electrically connected to the VCO tuning port such that the PLL controls the frequency of the VCO.
摘要翻译：提供了涉及压控振荡器温度补偿的系统。在这方面，代表性系统包括：具有调谐端口和锁相环（PLL）的压控振荡器（VCO）; 和温度相关电压源。 VCO选择性地展现了一种粗调谐模式，其中温度相关电压源电连接到VCO调谐端口，以及锁定模式，其中温度相关电压源未电连接到VCO调谐端口，使得PLL 控制VCO的频率。

9. 发明申请

US20100151806A1 RF Filter with Low-IF Mixing, Tuning and Calibration 有权
标题翻译：低中频混频，调谐和校准的射频滤波器
公开(公告)号：US20100151806A1
公开(公告)日：2010-06-17
申请号：US12335905
申请日：2008-12-16
申请人： Daniel Firoiu , Damian Costa , Mats Lindstrom , Kendal McNaught-Davis Hess , Weinen Gao
发明人： Daniel Firoiu , Damian Costa , Mats Lindstrom , Kendal McNaught-Davis Hess , Weinen Gao
IPC分类号： H04B1/18 , H04B1/16
CPC分类号： H04B1/30
摘要： Radio-frequency (RF) circuits, methods and systems are implemented according to a variety of embodiments. According to one such embodiment, a radio-frequency (RF) receiver circuit is implemented with an adjustable RF filter circuit in a receive path of the RF receiver circuit. A local oscillator (LO) generates a LO signal and an RX_LO signal from the LO signal. A mixing circuit mixes a signal received from the adjustable RF filter circuit and the RX_LO signal. An intermediate-frequency (IF) circuit generates an IF_cal signal at the receiver circuit. A calibration circuit implements both a calibration mode and a receive mode. In the calibration mode, a calibration signal is injected into the receive path. A setting of the adjustable RF filter circuit is determined. In the receive mode, the calibration circuit disables the injection of the calibration signal into the receive path of the RF receiver circuit.
摘要翻译：根据各种实施例实现射频（RF）电路，方法和系统。根据一个这样的实施例，射频（RF）接收机电路在RF接收器电路的接收路径中用可调节RF滤波器电路实现。本地振荡器（LO）从LO信号产生LO信号和RX_LO信号。混合电路混合从可调RF滤波电路接收的信号和RX_LO信号。中频（IF）电路在接收器电路处产生IF_cal信号。校准电路同时实现校准模式和接收模式。在校准模式下，将校准信号注入接收路径。确定可调节RF滤波器电路的设置。在接收模式下，校准电路禁止将校准信号注入RF接收器电路的接收路径。

10. 发明授权

US07496338B1 Multi-segment gain control system 有权
标题翻译：多段增益控制系统
公开(公告)号：US07496338B1
公开(公告)日：2009-02-24
申请号：US11027710
申请日：2004-12-29
申请人： John Groe , Naone Farias , Damian Costa , Babak Nejati
发明人： John Groe , Naone Farias , Damian Costa , Babak Nejati
IPC分类号： H04B1/06 , H03G5/16 , H03F3/45
CPC分类号： H03G3/3078 , H03G3/3068
摘要： Multi-segment gain control system. Apparatus is provided for a multi-segment gain control. The apparatus includes logic to convert a gain control signal to an exponential signal, and logic to map the exponential signal to multiple control signals that are used to control multiple gain stages to produce linear multi-segment gain control.
摘要翻译：多段增益控制系统提供了用于多段增益控制的装置。该装置包括将增益控制信号转换为指数信号的逻辑，以及将指数信号映射到用于控制多个增益级以产生线性多段增益控制的多个控制信号的逻辑。

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