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1. 发明授权

US08320847B2 Method and apparatus for signal power loss reduction in RF communication systems 有权
标题翻译： RF通信系统信号功率损耗降低的方法和装置
公开(公告)号：US08320847B2
公开(公告)日：2012-11-27
申请号：US11559382
申请日：2006-11-13
申请人： David J. Weber , Manolis Terrovitis , David K. Su
发明人： David J. Weber , Manolis Terrovitis , David K. Su
IPC分类号： H04B1/02
CPC分类号： H04B7/04 , Y02D70/444
摘要： Multiple power amplifiers in an RF front end are coupled to multiple antennas without diversity switching between the PAs and antennas. Diversity switches direct signals to broadcast by a selected antenna to a PA coupled to the selected antenna. Multiple LNAs are similarly coupled to the diverse antennas. Having one PA and LNA set for each antenna removes the need for diversity switching between the PA/LNAs and each antenna improving signal reception. In one embodiment, a single external PA performs broadcast functions and plural on-chip LNAs are used for reception. In another embodiment, phase shifters are coupled to each PA and LNA, which provide beam forming capability for broadcasts, and in phase signal combinations for received signals.
摘要翻译： RF前端中的多个功率放大器耦合到多个天线，而不需要PA和天线之间的分集切换。分集将直接信号通过所选天线广播到耦合到所选天线的PA。多个LNA类似地耦合到多个天线。为每个天线设置一个PA和LNA消除了PA / LNA之间的分集切换和每个天线改善信号接收的需要。在一个实施例中，单个外部PA执行广播功能，并且多个片上LNA被用于接收。在另一个实施例中，移相器耦合到每个PA和LNA，其提供用于广播的波束形成能力，以及用于接收信号的相位信号组合。

2. 发明授权

US08565707B2 Cancellation of spectral images in communication devices 失效
标题翻译：消除通信设备中的光谱图像
公开(公告)号：US08565707B2
公开(公告)日：2013-10-22
申请号：US13272872
申请日：2011-10-13
申请人： Amirpouya Kavousian , David K. Su
发明人： Amirpouya Kavousian , David K. Su
IPC分类号： H04B1/10
CPC分类号： H04B1/109
摘要： Digital-to-analog conversion in a communication device typically results in superimposed spectral images in the frequency spectrum of the analog waveform. These superimposed spectral images can distort the analog waveform and potentially violate the spectral mask and the constraints on out-of-band emissions set by the FCC. The communication device can be configured to implement a spectral image cancellation unit with feed-forward architecture to minimize the spectral images in the frequency spectrum of the analog waveform. The spectral image cancellation unit can generate a spectral image error signal comprising the spectral images at one or more spectral image frequencies. The spectral image cancellation unit can then subtract the spectral image error signal from the analog waveform to reduce spectral image components of the analog waveform and to yield an output signal for transmission.
摘要翻译：在通信设备中的数模转换通常在模拟波形的频谱中产生叠加的光谱图像。这些叠加的光谱图像可能使模拟波形失真，并可能违反频谱掩模和由FCC设定的带外发射限制。通信设备可以被配置为实现具有前馈架构的频谱图像消除单元，以最小化模拟波形的频谱中的频谱图像。光谱图像消除单元可以产生包括在一个或多个光谱图像频率处的光谱图像的光谱图像误差信号。然后，光谱图像消除单元可以从模拟波形中减去光谱图像误差信号，以减少模拟波形的光谱图像分量，并产生用于传输的输出信号。

3. 发明授权

US07590390B2 Method and apparatus for signal power loss reduction in RF communication systems 有权
标题翻译： RF通信系统信号功率损耗降低的方法和装置
公开(公告)号：US07590390B2
公开(公告)日：2009-09-15
申请号：US11624669
申请日：2007-01-18
申请人： David J. Weber , Manolis Terrovitis , David K. Su
发明人： David J. Weber , Manolis Terrovitis , David K. Su
IPC分类号： H04B1/44
CPC分类号： H04B7/04 , Y02D70/444
摘要： Multiple power amplifiers in an RF front end are coupled to multiple antennas without diversity switching between the PAs and antennas. Diversity switches direct signals to broadcast by a selected antenna to a PA coupled to the selected antenna. Multiple LNAs are similarly coupled to the diverse antennas. Having one PA and LNA set for each antenna removes the need for diversity switching between the PA/LNAs and each antenna improving signal reception. In one embodiment, a single external PA performs broadcast functions and plural on-chip LNAs are used for reception. In another embodiment, phase shifters are coupled to each PA and LNA, which provide beam forming capability for broadcasts, and in phase signal combinations for received signals.
摘要翻译： RF前端中的多个功率放大器耦合到多个天线，而无需在PA和天线之间进行分集切换。分集将直接信号通过所选天线广播到耦合到所选天线的PA。多个LNA类似地耦合到多个天线。为每个天线设置一个PA和LNA消除了PA / LNA之间的分集切换和每个天线改善信号接收的需要。在一个实施例中，单个外部PA执行广播功能，并且多个片上LNA被用于接收。在另一个实施例中，移相器耦合到每个PA和LNA，其提供用于广播的波束形成能力，以及用于接收信号的相位信号组合。

4. 发明授权

US06737920B2 Variable gain amplifier 失效
标题翻译：可变增益放大器
公开(公告)号：US06737920B2
公开(公告)日：2004-05-18
申请号：US10138048
申请日：2002-05-03
申请人： Hung-Min Jen , David K. Su
发明人： Hung-Min Jen , David K. Su
IPC分类号： H03F345
CPC分类号： H03F3/45475 , H03F1/3211 , H03F3/211 , H03F3/45183 , H03F3/45632 , H03F3/72 , H03F2203/21175 , H03F2203/45138 , H03F2203/45318 , H03F2203/45332 , H03F2203/45458 , H03F2203/45464 , H03F2203/45512 , H03F2203/45702 , H03F2203/45704 , H03F2203/7221 , H03F2203/7236 , H03G1/0029
摘要： The present invention provides a variable gain amplifier with a plurality of gain stages in which each of the gain stages is implemented using a circuit that implements a neutralization approach. This variable gain amplifier provides stable operation characteristics as different gain stages within the variable gain amplifier are turned on and off. This variable gain amplifier also increases linearity across the entire operating range. Additionally, the variable gain amplifier of the present invention provides a constant input impedance through different gain settings. Further, the present invention provides a variable gain amplifier in which each of the various gain stages therein maximize the available voltage swing. Finally, this variable gain amplifier improves common-mode rejection performance and attenuates unwanted harmonics.
摘要翻译：本发明提供一种具有多个增益级的可变增益放大器，其中使用实现中和方法的电路来实现每个增益级。该可变增益放大器提供稳定的操作特性，因为可变增益放大器内的不同增益级被打开和关闭。该可变增益放大器还可以在整个工作范围内提高线性度。此外，本发明的可变增益放大器通过不同的增益设置提供恒定的输入阻抗。此外，本发明提供一种可变增益放大器，其中各种增益级中的每一个增益级可用的电压摆幅最大化。最后，该可变增益放大器提高了共模抑制性能，并减少了不需要的谐波。

5. 发明授权

US06242963B1 Differential mixer with improved linearity 有权
标题翻译：差分混频器具有提高的线性度
公开(公告)号：US06242963B1
公开(公告)日：2001-06-05
申请号：US09392982
申请日：1999-09-09
申请人： David K. Su , Masoud Zargari
发明人： David K. Su , Masoud Zargari
IPC分类号： G06F712
CPC分类号： H03D7/1441 , H03D7/1408 , H03D7/1458 , H03D7/1491 , H03D2200/0043
摘要： A mixing apparatus includes a Gilbert cell connected to a first load and a second load. In one embodiment each load contains transistors that are configured as a diode and a triode, where these circuits are additively combined to achieve substantially linear voltage-current characteristics over a predetermined range. The mixing apparatus takes two pairs of differential inputs and produces a pair of differential outputs. Because of the substantial linearity of the loads, the inputs and outputs of the mixing apparatus are acceptable over a relatively large range of input settings. In other embodiments each load may contain a transistor configured as a triode and a resistor, where these circuits are likewise additively combined to achieve substantially linear voltage-current characteristics over a predetermined range.
摘要翻译：混合装置包括连接到第一负载和第二负载的吉尔伯特电池。在一个实施例中，每个负载包含配置为二极管和三极管的晶体管，其中这些电路被加法组合以在预定范围内实现基本上线性的电压 - 电流特性。混合装置采用两对差分输入，并产生一对差分输出。由于负载的实质线性，混合装置的输入和输出在相对大的输入设置范围内是可以接受的。在其他实施例中，每个负载可以包含配置为三极管和电阻器的晶体管，其中这些电路同样地被加法组合以在预定范围内实现基本上线性的电压 - 电流特性。

6. 发明授权

US5039953A Class AB CMOS output amplifier 失效
标题翻译： AB类CMOS输出放大器
公开(公告)号：US5039953A
公开(公告)日：1991-08-13
申请号：US526082
申请日：1990-05-18
申请人： David K. Su
发明人： David K. Su
IPC分类号： H03F3/30
CPC分类号： H03F3/3001
摘要： A simple class CMOS AB amplifier capable of operating from a single 3 volt supply while driving a 2000 picofarad load.
摘要翻译：一个简单的类别CMOS AB放大器，可以在单个3伏电源下工作，同时驱动2000皮秒的负载。

7. 发明授权

US08532588B1 Apparatus for signal power loss reduction in RF communication systems 有权
标题翻译： RF通信系统信号功率损耗降低的装置
公开(公告)号：US08532588B1
公开(公告)日：2013-09-10
申请号：US11690784
申请日：2007-03-23
申请人： David J. Weber , Manolis Terrovitis , David K. Su
发明人： David J. Weber , Manolis Terrovitis , David K. Su
IPC分类号： H04B1/02
CPC分类号： H04B7/0814 , H04B7/0608 , Y02D70/444
摘要： Redundancies of power amplifiers (PAs) or low noise amplifiers (LNAs) at the front end of an RF device are used to reduce losses that typically occur at a diversity switch. A signal designator can advantageously be used to select designated signals, which are provided to the PAs for transmitting or provided by the LNAs during receiving.
摘要翻译：在RF设备前端的功率放大器（PA）或低噪声放大器（LNA）的冗余被用于减少通常在分集开关处发生的损耗。信号指示符可以有利地用于选择提供给PA的指定信号，用于在接收期间由LNA发送或提供。

8. 发明授权

US08504889B2 Sleep clock error recovery scheme 有权
标题翻译：休眠时钟错误恢复方案
公开(公告)号：US08504889B2
公开(公告)日：2013-08-06
申请号：US12945067
申请日：2010-11-12
申请人： Paul J. Husted , William J. McFarland , David K. Su
发明人： Paul J. Husted , William J. McFarland , David K. Su
IPC分类号： H04L1/18
CPC分类号： H04W56/0015 , H04W52/0216 , Y02D70/142 , Y02D70/144 , Y02D70/164
摘要： A wireless device includes a functional unit, a wireless transceiver, an antenna and a clock. The wireless transceiver and antenna are coupled to the functional unit. The clock is coupled to the functional unit and the wireless transceiver. The clock is generates a clock signal. The wireless device is coupled wirelessly to a wireless slave device. The functional unit is configured to determine an amount of time since a last keep alive transmission with the slave device has occurred based on the clock. The functional unit determines a number of keep alive transmissions to transmit to the slave device, and appropriate transmission times for the keep alive transmissions relative to a next scheduled keep alive transmission time, based on the determined amount of time since the last keep alive transmission. The functional unit begins successive transmission of the keep alive transmissions to the slave device per the transmission times.
摘要翻译：无线设备包括功能单元，无线收发器，天线和时钟。无线收发器和天线耦合到功能单元。时钟耦合到功能单元和无线收发器。时钟产生时钟信号。无线设备被无线耦合到无线从设备。功能单元被配置为基于时钟来确定与从设备的最后一次保持传输相关的时间量。功能单元基于自从上一次保持活动传输以来确定的时间量，确定要传送到从设备的多个保持活动传输以及相对于下一个预定保持传送时间的保持传送的适当传输时间。功能单元根据传输时间开始向从设备继续传输保持传送。

9. 发明申请

US20120124444A1 Sleep Clock Error Recovery Scheme 有权
标题翻译：睡眠时钟错误恢复方案
公开(公告)号：US20120124444A1
公开(公告)日：2012-05-17
申请号：US12945067
申请日：2010-11-12
申请人： Paul J. Husted , William J. McFarland , David K. Su
发明人： Paul J. Husted , William J. McFarland , David K. Su
IPC分类号： G06F1/04 , H04L1/18 , G06F11/14 , G06F1/12
CPC分类号： H04W56/0015 , H04W52/0216 , Y02D70/142 , Y02D70/144 , Y02D70/164
摘要： A wireless device includes a functional unit, a wireless transceiver, an antenna and a clock. The wireless transceiver and antenna are coupled to the functional unit. The clock is coupled to the functional unit and the wireless transceiver. The clock is generates a clock signal. The wireless device is coupled wirelessly to a wireless slave device. The functional unit is configured to determine an amount of time since a last keep alive transmission with the slave device has occurred based on the clock. The functional unit determines a number of keep alive transmissions to transmit to the slave device, and appropriate transmission times for the keep alive transmissions relative to a next scheduled keep alive transmission time, based on the determined amount of time since the last keep alive transmission. The functional unit begins successive transmission of the keep alive transmissions to the slave device per the transmission times.
摘要翻译：无线设备包括功能单元，无线收发器，天线和时钟。无线收发器和天线耦合到功能单元。时钟耦合到功能单元和无线收发器。时钟产生时钟信号。无线设备被无线耦合到无线从设备。功能单元被配置为基于时钟来确定与从设备的最后一次保持传输相关的时间量。功能单元基于自从上一次保持活动传输以来确定的时间量，确定要传送到从设备的多个保持活动传输以及相对于下一个预定保持传送时间的保持传送的适当传输时间。功能单元根据传输时间开始向从设备继续传输保持传送。

10. 发明授权

US06404289B1 Synthesizer with lock detector, lock algorithm, extended range VCO, and a simplified dual modulus divider 有权
标题翻译：具有锁定检测器，锁定算法，扩展范围VCO和简化双模式分频器的合成器
公开(公告)号：US06404289B1
公开(公告)日：2002-06-11
申请号：US09747778
申请日：2000-12-22
申请人： David K. Su , Chik Patrick Yue , David J. Weber , Masound Zargari
发明人： David K. Su , Chik Patrick Yue , David J. Weber , Masound Zargari
IPC分类号： H03L7095
CPC分类号： H03L7/099 , H03K23/667 , H03L7/089 , H03L7/095 , H03L7/10 , H03L7/193 , Y10S331/02
摘要： The present invention provides a synthesizer having an efficient lock detect signal generator, an extended range VCO that can operate within any one of a plurality of adjacent characteristic curves defined by a plurality of adjacent regions, and a divide circuit implemented using only a single counter along with a decoder. This allows for a method of operating the synthesizer, methods of establishing or reestablishing a lock condition using the extended range VCO, and a method of designing a plurality of divide circuits which each use the same single counter and each use a different decoder.
摘要翻译：本发明提供一种合成器，其具有有效的锁定检测信号发生器，能够在由多个相邻区域限定的多个相邻特性曲线中的任何一个中操作的扩展范围VCO，以及仅使用单个计数器实现的除法电路与解码器。这允许操作合成器的方法，使用扩展范围VCO建立或重新建立锁定条件的方法，以及设计多个除法电路的方法，每个除法电路使用相同的单个计数器并且每个使用不同的解码器。

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