专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08326246B2 Super regenerative (SR) apparatus having plurality of parallel SR amplifiers tuned to distinct frequencies 有权
标题翻译：具有被调谐到不同频率的多个并联SR放大器的超再生（SR）装置
公开(公告)号：US08326246B2
公开(公告)日：2012-12-04
申请号：US11775786
申请日：2007-07-10
申请人： Pavel Monat , David Jonathan Julian , Robert Keith Douglas , Prasad S. Gudem
发明人： Pavel Monat , David Jonathan Julian , Robert Keith Douglas , Prasad S. Gudem
IPC分类号： H04B7/00
CPC分类号： H03D11/00 , H04B2001/6908
摘要： An apparatus, which may be configured as a receiver or transceiver, includes a plurality of super regenerative (SR) amplifiers coupled in parallel, wherein the SR amplifiers are tuned to distinct frequency bands, respectively. The apparatus may further include isolation amplifiers at the respective inputs and outputs of the SR amplifiers to prevent injection locking and reduce power leakage. The apparatus may include a circuit to reduce or substantially eliminate in-band jamming signals. The apparatus may form at least part of a wireless communications device adapted to receive signals from other wireless communications devices, adapted to transmit signal to other wireless communications devices, and adapted to both transmit and receive signals to and from other wireless communications devices.
摘要翻译：可以被配置为接收器或收发器的装置包括并联耦合的多个超再生（SR）放大器，其中SR放大器分别被调谐到不同的频带。该装置还可以包括在SR放大器的相应输入和输出处的隔离放大器，以防止注入锁定并减少功率泄漏。该装置可以包括用于减少或基本上消除带内干扰信号的电路。该装置可以形成适于从其他无线通信设备接收信号的无线通信设备的至少一部分，其适于向其他无线通信设备发送信号，并且适于向和从其他无线通信设备发送和接收信号。

2. 发明申请

US20090016548A1 SUPER REGENERATIVE (SR) APPARATUS HAVING PLURALITY OF PARALLEL SR AMPLIFIERS TUNED TO DISTINCT FREQUENCIES 有权
标题翻译：超级再生器（SR）具有调谐到不同频率的并联SR放大器的平均数的装置
公开(公告)号：US20090016548A1
公开(公告)日：2009-01-15
申请号：US11775786
申请日：2007-07-10
申请人： Pavel Monat , David Jonathan Julian , Robert Keith Douglas , Prasad S. Gudem
发明人： Pavel Monat , David Jonathan Julian , Robert Keith Douglas , Prasad S. Gudem
IPC分类号： H03F3/68
CPC分类号： H03D11/00 , H04B2001/6908
摘要： An apparatus, which may be configured as a receiver or transceiver, includes a plurality of super regenerative (SR) amplifiers coupled in parallel, wherein the SR amplifiers are tuned to distinct frequency bands, respectively. The apparatus may further include isolation amplifiers at the respective inputs and outputs of the SR amplifiers to prevent injection locking and reduce power leakage. The apparatus may include a circuit to reduce or substantially eliminate in-band jamming signals. The apparatus may form at least part of a wireless communications device adapted to receive signals from other wireless communications devices, adapted to transmit signal to other wireless communications devices, and adapted to both transmit and receive signals to and from other wireless communications devices.
摘要翻译：可以被配置为接收器或收发器的装置包括并联耦合的多个超再生（SR）放大器，其中SR放大器分别被调谐到不同的频带。该装置还可以包括在SR放大器的相应输入和输出处的隔离放大器，以防止注入锁定并减少功率泄漏。该装置可以包括用于减少或基本上消除带内干扰信号的电路。该装置可以形成适于从其他无线通信设备接收信号的无线通信设备的至少一部分，其适于向其他无线通信设备发送信号，并且适于向和从其他无线通信设备发送和接收信号。

3. 发明授权

US08767869B2 Joint linear and non-linear cancellation of transmit self-jamming interference 有权
标题翻译：联合线性和非线性消除发射自干扰干扰
公开(公告)号：US08767869B2
公开(公告)日：2014-07-01
申请号：US13587792
申请日：2012-08-16
申请人： Roberto Rimini , Peter D. Heldmann , Prasad S. Gudem , Sumit Verma , Joseph Burke
发明人： Roberto Rimini , Peter D. Heldmann , Prasad S. Gudem , Sumit Verma , Joseph Burke
IPC分类号： H04L25/03 , H04L25/49 , H04K1/02
CPC分类号： H04B1/109 , H04B1/30 , H04B1/525
摘要： Certain aspects of the present disclosure propose an adaptive joint linear and non-linear digital filter that can adaptively estimate and reconstruct cascaded effects of linear and non-linear self-jamming distortions introduced by non-linearities in the transmit and/or receive chains. The proposed digital filter may be used to cancel second-order inter-modulation distortion (IM2) generated in the receive chain and/or harmonic distortion generated in the transmit chain, as well as other distortions introduced by the transmit/and or receive chains.
摘要翻译：本公开的某些方面提出了一种自适应联合线性和非线性数字滤波器，其可以自适应地估计和重建由发送和/或接收链中的非线性引入的线性和非线性自干扰失真的级联效应。所提出的数字滤波器可以用于消除在接收链中产生的二阶互调失真（IM2）和/或在发送链中产生的谐波失真以及由发送/和/或接收链引入的其他失真。

4. 发明授权

US08571510B2 High linearity low noise receiver with load switching 有权
标题翻译：具有负载切换的高线性低噪声接收器
公开(公告)号：US08571510B2
公开(公告)日：2013-10-29
申请号：US12193695
申请日：2008-08-18
申请人： Li Liu , Prasad S. Gudem
发明人： Li Liu , Prasad S. Gudem
IPC分类号： H04B1/18 , H04B1/26 , H04B1/28
CPC分类号： H03F1/32 , H03F1/0277 , H03F1/223 , H03F1/56 , H03F3/45188 , H03F3/72 , H03F2200/294 , H03F2200/336 , H03F2203/45386 , H03F2203/45394 , H03F2203/45726 , H03F2203/7206 , H03F2203/7236 , H04B1/109 , H04B1/18
摘要： A receiver includes a low noise amplifier (LNA) and multiple pairs of mixers. The LNA receives and amplifies an LNA input signal and provides at least one LNA output signal. Each pair of mixers downconverts one of the at least one LNA output signal when enabled. Each pair of mixers may be selectively enabled or disabled, e.g., based on a mode selected from among multiple modes. In one design, the LNA includes multiple load sections coupled in parallel. Each load section may be selectively enabled or disabled, e.g., based on the selected mode. In one design, first and second pairs of mixers and first and second load sections may be enabled for a high linearity mode. The first pair of mixers and the first load section may be enabled and the second pair of mixers and the second load section may be disabled for a low linearity mode.
摘要翻译：接收机包括低噪声放大器（LNA）和多对混频器。 LNA接收并放大LNA输入信号并提供至少一个LNA输出信号。当使能时，每对混频器降低至少一个LNA输出信号之一。可以例如基于从多个模式中选择的模式来选择性地启用或禁用每对混频器。在一种设计中，LNA包括并联耦合的多个负载部分。可以例如基于所选择的模式来选择性地启用或禁用每个加载部分。在一种设计中，第一和第二对混频器以及第一和第二负载部分可以被启用用于高线性模式。可以启用第一对混频器和第一负载部分，并且可以对低线性模式禁用第二对混频器和第二负载部分。

5. 发明授权

US08433272B2 Reconfigurable high linearity low noise figure receiver requiring no interstage saw filter 有权
标题翻译：可重构的高线性度低噪声系数接收器，不需要级间锯式过滤器
公开(公告)号：US08433272B2
公开(公告)日：2013-04-30
申请号：US12233420
申请日：2008-09-18
申请人： Prasad S. Gudem , Jose Cabanillas , Li-Chung Chang , Li Liu
发明人： Prasad S. Gudem , Jose Cabanillas , Li-Chung Chang , Li Liu
IPC分类号： H04K3/00 , H04B1/06 , H04B7/00
CPC分类号： H04B1/109 , H03F1/3205 , H03F1/3211 , H03F3/193 , H03F3/245
摘要： A receiver includes a jammer detector configured to detect the presence or the absence of jamming in a communication signal within a gain state. The receiver further includes an amplifier configured to amplify the communication signal in a high linearity receiving mode or a low linearity receiving mode, wherein the high linearity receiving mode corresponds with a lower gain for the gain state in the amplifier relative to that of the low linearity receiving mode. In addition, the receiver includes a processing unit coupled to the jammer detector, the processing unit being configured to control the amplifier to amplify the communication signal in either the high linearity receiving mode or the low linearity receiving mode, based on the output of the jammer detector detecting the presence or the absence of jamming in the communication signal. A method is also provided for processing a communication signal in a receiver.
摘要翻译：接收机包括干扰检测器，其被配置为检测在增益状态内的通信信号中存在或不存在干扰。接收器还包括放大器，被配置为以高线性度接收模式或低线性度接收模式放大通信信号，其中高线性度接收模式对应于放大器相对于低线性度的增益状态的较低增益接收模式。此外，接收机包括耦合到干扰检测器的处理单元，该处理单元被配置为基于干扰信号的输出来控制放大器以高线性接收模式或低线性度接收模式放大通信信号检测器检测通信信号中是否存在干扰。还提供了一种用于处理接收机中的通信信号的方法。

6. 发明申请

US20130044791A1 JOINT LINEAR AND NON-LINEAR CANCELLATION OF TRANSMIT SELF-JAMMING INTERFERENCE 有权
标题翻译：接头线性和非线性消除传输自我干扰
公开(公告)号：US20130044791A1
公开(公告)日：2013-02-21
申请号：US13587792
申请日：2012-08-16
申请人： Roberto Rimini , Peter D. Heidmann , Prasad S. Gudem , Sumit Verma , Joseph Burke
发明人： Roberto Rimini , Peter D. Heidmann , Prasad S. Gudem , Sumit Verma , Joseph Burke
IPC分类号： H04B1/44
CPC分类号： H04B1/109 , H04B1/30 , H04B1/525
摘要： Certain aspects of the present disclosure propose an adaptive joint linear and non-linear digital filter that can adaptively estimate and reconstruct cascaded effects of linear and non-linear self-jamming distortions introduced by non-linearities in the transmit and/or receive chains. The proposed digital filter may be used to cancel second-order inter-modulation distortion (IM2) generated in the receive chain and/or harmonic distortion generated in the transmit chain, as well as other distortions introduced by the transmit/and or receive chains.
摘要翻译：本公开的某些方面提出了一种自适应联合线性和非线性数字滤波器，其可以自适应地估计和重建由发送和/或接收链中的非线性引入的线性和非线性自干扰失真的级联效应。所提出的数字滤波器可以用于消除在接收链中产生的二阶互调失真（IM2）和/或在发送链中产生的谐波失真以及由发送/和/或接收链引入的其他失真。

7. 发明申请

US20090212835A1 DELTA-SIGMA MODULATOR CLOCK DITHERING IN A FRACTIONAL-N PHASE-LOCKED LOOP 有权
标题翻译： DELTA-SIGMA调制器时钟在一个分段N相锁定环路
公开(公告)号：US20090212835A1
公开(公告)日：2009-08-27
申请号：US12037503
申请日：2008-02-26
申请人： Yang Xu , Gang Zhang , Prasad S. Gudem
发明人： Yang Xu , Gang Zhang , Prasad S. Gudem
IPC分类号： H03L7/08
CPC分类号： H03L7/1974
摘要： The clock signal supplied to the delta-sigma modulator in a fractional-N phase-locked loop is dithered. In one example, the PLL includes a novel programmable clock dithering circuit. The programmable clock dithering circuit is controllable via a serial bus to dither the phase of the clock signal in a selected one of several ways. If the clock signal is dithered in a first way (pseudo-random phase dithering), then the power of digital noise generated by the delta-sigma modulator is spread over a frequency band, thereby reducing the degree to which the noise interferes with other circuitry. If the clock signal is dithered in a second way (rotational phase dithering), then the power of digital noise is frequency shifted such that the degree to which the noise interferes with the other circuitry is reduced. The programmable clock dithering circuit can be controlled in other ways. For example, dithering can be programmably disabled.
摘要翻译：在分数N锁相环中提供给Δ-Σ调制器的时钟信号被抖动。在一个示例中，PLL包括新颖的可编程时钟抖动电路。可编程时钟抖动电路可通过串行总线进行控制，以选择的几种方式对时钟信号的相位进行抖动。如果时钟信号以第一种方式抖动（伪随机相位抖动），则由Δ-Σ调制器产生的数字噪声的功率在频带上扩展，从而降低噪声干扰其他电路的程度。如果时钟信号以第二种方式抖动（旋转相位抖动），则数字噪声的功率被频移，使得噪声干扰另一电路的程度降低。可编程时钟抖动电路可以以其他方式进行控制。例如，抖动可以可编程地禁用。

8. 发明申请

US20090051424A1 ACTIVE CIRCUITS WITH LOAD LINEARIZATION 有权
标题翻译：具有负载线性化的有源电路
公开(公告)号：US20090051424A1
公开(公告)日：2009-02-26
申请号：US11842712
申请日：2007-08-21
申请人： Li Liu , Prasad S. Gudem
发明人： Li Liu , Prasad S. Gudem
IPC分类号： H03F1/26 , H03F3/04 , H03F3/16
CPC分类号： H04B1/109 , H03F1/223 , H03F1/3205 , H03F1/3211 , H03F3/45179 , H03F3/45188 , H03F2200/453 , H03F2203/45306 , H03F2203/45352 , H03F2203/45386 , H03F2203/45394 , H04B1/525
摘要： Active circuits with active loads linearized via distortion cancellation are described. In one design, an apparatus includes a first stage and a load stage. For an amplifier, the first stage amplifies an input signal and provides an output signal having a larger signal level. For a mixer, the first stage mixes an input signal with an LO signal and provides an output signal. The load stage provides an active load for the first stage and is linearized by canceling distortion generated by the active load. In one design, the load stage includes a first transistor that provides the active load and generates distortion due to its nonlinearity. The load stage further includes at least one transistor that generates a replica of the distortion from the first transistor. The distortion replica is used to cancel the distortion from the first transistor. The first stage may also be linearized with distortion cancellation.
摘要翻译：描述了通过失真消除线性化的有源负载的有源电路。在一种设计中，装置包括第一级和负载级。对于放大器，第一级放大输入信号并提供具有较大信号电平的输出信号。对于混频器，第一级将输入信号与LO信号混频并提供输出信号。负载级为第一级提供有效负载，并通过消除由有效负载产生的失真来线性化。在一种设计中，负载级包括提供有源负载并由于其非线性而产生失真的第一晶体管。负载级还包括至少一个晶体管，其产生来自第一晶体管的失真的复制品。失真复制品用于消除第一晶体管的失真。第一级也可以通过失真消除线性化。

9. 发明申请

US20080227409A1 WIRELESS RECEIVER WITH NOTCH FILTER TO REDUCE EFFECTS OF TRANSMIT SIGNAL LEAKAGE 有权
标题翻译：带有过滤器的无线接收器，以减少发射信号泄漏的影响
公开(公告)号：US20080227409A1
公开(公告)日：2008-09-18
申请号：US11777249
申请日：2007-07-12
申请人： Li-Chung Chang , Prasad S. Gudem , Jose Cabanillas
发明人： Li-Chung Chang , Prasad S. Gudem , Jose Cabanillas
IPC分类号： H04B1/38 , H04B1/06 , H04B1/10
CPC分类号： H04B1/525 , H04B1/1036
摘要： This disclosure describes techniques for reducing adverse effects of TX signal leakage in a full-duplex, wireless communication device. The techniques make use of a notch filter to reject TX signal leakage in a signal processed in the RX path of the wireless communication device. The notch filter may be constructed as a complex notch filter using passive resistor and capacitor components to produce a notch frequency that attenuates TX signal leakage components in a desired signal. The notch filter may be applied to a down-converted, baseband signal produced by a passive mixer.
摘要翻译：本公开描述了用于减少全双工无线通信设备中的TX信号泄漏的不利影响的技术。这些技术利用陷波滤波器来抑制在无线通信设备的RX路径中处理的信号中的TX信号泄漏。陷波滤波器可以被构造为使用无源电阻器和电容器部件的复陷波滤波器，以产生在所需信号中衰减TX信号泄漏分量的陷波频率。陷波滤波器可以应用于由无源混频器产生的下变频的基带信号。

10. 发明授权

US08837331B2 Duplexer bypass 有权
标题翻译：双工器旁路
公开(公告)号：US08837331B2
公开(公告)日：2014-09-16
申请号：US13019893
申请日：2011-02-02
申请人： ChunChung Chan , Alvin Siu-Chung Ng , Prasad S. Gudem
发明人： ChunChung Chan , Alvin Siu-Chung Ng , Prasad S. Gudem
IPC分类号： H04B7/005 , H04B1/44 , H04B7/06 , H04B7/08 , H04B1/52
CPC分类号： H04B1/44 , H04B1/525 , H04B7/0602 , H04B7/0802
摘要： Disclosed are circuits, techniques and methods for implementing a process of selectively bypassing a duplexer in a transmission path. In a particular embodiment, a receiver and a transmitter are coupled to a shared antenna through a duplexer. The duplexer may be selectively bypassed under certain conditions while the receiver is disabled and/or powered off.
摘要翻译：公开了用于实现选择性地绕过传输路径中的双工器的过程的电路，技术和方法。在特定实施例中，接收机和发射机通过双工器耦合到共享天线。在接收机被禁用和/或断电的情况下，可以在特定条件下选择性地旁路双工器。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式