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1. 发明申请

WO2009097353A1 METHOD AND APPARATUS FOR REDUCING INTERMODULATION DISTORTION IN AN ELECTRONIC DEVICE HAVING AN AMPLIFIER CIRCUIT 审中-公开
标题翻译：用于减小具有放大器电路的电子设备中的互调失真的方法和装置
公开(公告)号：WO2009097353A1
公开(公告)日：2009-08-06
申请号：PCT/US2009/032272
申请日：2009-01-28
申请人： QUALCOMM INCORPORATED , DENG, Junxiong , LIU, Li , GUDEM, Prasad, S.
发明人： DENG, Junxiong , LIU, Li , GUDEM, Prasad, S.
IPC分类号： H03F3/193 , H03F1/32 , H03F1/34
CPC分类号： H03F3/193 , H03F1/223 , H03F1/3205 , H03F1/34 , H03F2200/294 , H03F2201/3206
摘要： An electronic device includes an amplifier circuit coupled to a linearizer. The amplifier circuit may receive a first input signal including first and second frequencies and generate a first output signal including a delta frequency signal at a delta frequency, which is the difference between the first frequency and the second frequency. The linearizer includes a signal detector circuit, a current-mirror circuit, a low pass filter, a phase shifter, and a bias circuit. The signal detector circuit may generate a second output signal. The current-mirror circuit may adjust an amplitude of a signal. The low pass filter may eliminate a portion of the second output signal having frequencies greater than the delta frequency. The phase shifter may generate a feedback signal corresponding to the delta frequency signal. An amplitude and/or a phase of the feedback signal is different from an amplitude and/or a phase of the delta frequency signal.
摘要翻译：电子设备包括耦合到线性化器的放大器电路。放大器电路可以接收包括第一和第二频率的第一输入信号，并产生第一输出信号，该第一输出信号包括第一频率和第二频率之间的差异的增量频率的增量频率信号。线性化器包括信号检测器电路，电流镜电路，低通滤波器，移相器和偏置电路。信号检测器电路可以产生第二输出信号。电流镜电路可以调节信号的幅度。低通滤波器可以消除具有大于Δ频率的频率的第二输出信号的一部分。移相器可以产生对应于Δ频率信号的反馈信号。反馈信号的振幅和/或相位与增量频率信号的振幅和/或相位不同。

2. 发明申请

WO2009129330A1 METHOD AND APPARATUS FOR PROCESSING A COMMUNICATION SIGNAL IN A RECEIVER 审中-公开
标题翻译：在接收机中处理通信信号的方法和装置
公开(公告)号：WO2009129330A1
公开(公告)日：2009-10-22
申请号：PCT/US2009/040701
申请日：2009-04-15
申请人： QUALCOMM INCORPORATED , GUDEM, Prasad, S. , CABANILLAS, Jose , CHANG, Li-Chung , LIU, Li
发明人： GUDEM, Prasad, S. , CABANILLAS, Jose , CHANG, Li-Chung , LIU, Li
IPC分类号： H04B1/10
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。

3. 发明申请

WO2010022093A1 HIGH-LINEARITY LOW-NOISE RECEIVER WITH LOAD SWITCHING 审中-公开
标题翻译：具有负载开关的高线性低噪声接收器
公开(公告)号：WO2010022093A1
公开(公告)日：2010-02-25
申请号：PCT/US2009/054214
申请日：2009-08-18
申请人： QUALCOMM INCORPORATED , LIU, Li , GUDEM, Prasad, S.
发明人： LIU, Li , GUDEM, Prasad, S.
IPC分类号： H03F1/56 , H03F3/45
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。

4. 发明申请

WO2009126661A1 A HIGHLY LINEAR EMBEDDED FILTERING PASSIVE MIXER 审中-公开
标题翻译：高线性嵌入式过滤无源混频器
公开(公告)号：WO2009126661A1
公开(公告)日：2009-10-15
申请号：PCT/US2009/039821
申请日：2009-04-07
申请人： QUALCOMM INCORPORATED , KIM, Namsoo , GUDEM, Prasad, S. , VLADIMIR, Aparin
发明人： KIM, Namsoo , GUDEM, Prasad, S. , VLADIMIR, Aparin
IPC分类号： H03D7/16
CPC分类号： H03D7/163 , H03D7/1466 , H03D7/166
摘要： A communication channel has a highly linear switched current mixer that incorporates passive filtering (e.g., low pass, notch) for improved transmitting (Tx) and receiving (Rx) with adding external filtering components. A high IIP2 (input referenced second order intercept point) of the receiver at the Tx offset is essential to avoid corrupting the system's sensitivity performance, and a high triple beat (TB) is required to avoid sensitivity degradation due to transmitter leakage. Thanks to the embedded filtering in the mixer and the active post-distortion (APD) method in a low noise amplifier (LNA), the required high linearity is achieved with low noise figure and power consumption, overcoming transmitter power leakage without the use of a SAW (surface acoustic wave) filter.
摘要翻译：通信通道具有高度线性的开关电流混频器，其结合无源滤波（例如，低通，陷波），用于增加外部滤波组件以改善发射（Tx）和接收（Rx）。接收机在Tx偏移处的高IIP2（输入参考二阶截取点）对于避免破坏系统的灵敏度性能至关重要，并且需要高三重（TB）以避免由于发射机泄漏引起的灵敏度劣化。由于混频器中的嵌入式滤波器和低噪声放大器（LNA）中的有源后失真（APD）方法，所需的高线性度可通过低噪声系数和功耗实现，克服发射机功率泄漏而不使用 SAW（表面声波）滤波器。

5. 发明申请

WO2009036080A1 COMMON MODE SIGNAL ATTENUATION FOR A DIFFERENTIAL DUPLEXER 审中-公开
标题翻译：差分双工器的共模信号衰减
公开(公告)号：WO2009036080A1
公开(公告)日：2009-03-19
申请号：PCT/US2008/075881
申请日：2008-09-10
申请人： QUALCOMM INCORPORATED , CABANILLAS, Jose , GUDEM, Prasad, S. , KWOK, Sai, Chong , LOVE, David
发明人： CABANILLAS, Jose , GUDEM, Prasad, S. , KWOK, Sai, Chong , LOVE, David
IPC分类号： H04B1/52
CPC分类号： H04B1/52 , H04B1/18
摘要： Techniques for attenuating undesired signal components from a differential duplexer are described. The duplexer provides a differential received signal at RX+ and RX- ports. This differential received signal includes an undesired common mode signal, which may come from a transmit signal. The common mode signal is attenuated with a common mode trap in an impedance matching network coupled to the RX+ and RX- ports. The matching network includes a first passive circuit coupled between the RX+ port and a first node, a second passive circuit coupled between the RX- port and a second node, and the common mode trap coupled between the first and second nodes. In one design, the common mode trap includes a first inductor coupled between the first node and a common node, a second inductor coupled between the second node and the common node, and a capacitor coupled between the common node and circuit ground.
摘要翻译：描述了用于衰减来自差分双工器的不需要的信号分量的技术。双工器在RX +和RX-端口提供差分接收信号。该差分接收信号包括可能来自发射信号的不期望的共模信号。在耦合到RX +和RX-端口的阻抗匹配网络中，共模信号被一个共模陷波衰减。匹配网络包括耦合在RX +端口和第一节点之间的第一无源电路，耦合在RX端口和第二节点之间的第二无源电路以及耦合在第一和第二节点之间的共模陷阱。在一种设计中，共模阱包括耦合在第一节点和公共节点之间的第一电感器，耦合在第二节点和公共节点之间的第二电感器，以及耦合在公共节点和电路接地之间的电容器。

6. 发明申请

WO2010025288A1 INTERFERENCE DETECTION APPARATUS AND METHOD 审中-公开
标题翻译：干扰检测装置和方法
公开(公告)号：WO2010025288A1
公开(公告)日：2010-03-04
申请号：PCT/US2009/055240
申请日：2009-08-27
申请人： QUALCOMM Incorporated , PATEL, Shrenik , GUDEM, Prasad, S. , PALAKURTY, Saraswathi
发明人： PATEL, Shrenik , GUDEM, Prasad, S. , PALAKURTY, Saraswathi
IPC分类号： H04B1/10
CPC分类号： H04K3/82 , H04B1/1027 , H04B1/109
摘要： Techniques for detecting jammers in a received signal are described. A jammer detector includes a jammer filter for attenuating transmit signals leaked into the receive path, a pulse generator for converting the interference signals into discrete-level pulses, and a pulse processor for determining the presence of jammers in the discrete-level pulses. In an exemplary embodiment, the pulse processor is configured to further discriminate among close-in jammers that are close to the desired receive frequency, far-away jammers, and jammers arising from the transmit signals leaked into the receive path. In another exemplary embodiment, hysteresis is provided in the pulse generator to enable the generation of reliable pulses. Further aspects include configuring the jammer detector for operation in a plurality of frequency bands and/or according to a plurality of communications standards.
摘要翻译：描述用于检测接收信号中的干扰的技术。干扰检测器包括用于衰减泄漏到接收路径中的发射信号的干扰滤波器，用于将干扰信号转换成离散电平脉冲的脉冲发生器，以及用于确定离散电平脉冲中干扰的存在的脉冲处理器。在示例性实施例中，脉冲处理器被配置为进一步区分接近期望接收频率的接近干扰信号，远距离干扰信号和从泄漏到接收路径中的发射信号产生的干扰。在另一个示例性实施例中，在脉冲发生器中提供迟滞以使能产生可靠的脉冲。另外的方面包括将干扰检测器配置为在多个频带中操作和/或根据多个通信标准。

7. 发明申请

WO2009114638A1 HIGH-LINEARITY RECEIVER WITH TRANSMIT LEAKAGE CANCELLATION 审中-公开
标题翻译：具有发送泄漏消除功能的高线性接收器
公开(公告)号：WO2009114638A1
公开(公告)日：2009-09-17
申请号：PCT/US2009/036849
申请日：2009-03-11
申请人： QUALCOMM INCORPORATED , GUDEM, Prasad, S. , CHANG, Li-Chung
发明人： GUDEM, Prasad, S. , CHANG, Li-Chung
IPC分类号： H04B1/52
CPC分类号： H04B1/525
摘要： Techniques for performing transmit (TX) leakage cancellation are described. A receiver includes a low noise amplifier (LNA) and a TX leakage canceller. The LNA amplifies a receiver input signal and provides an amplified signal. The TX leakage canceller includes a downconverter, a notch filter, and an upconverter. The downconverter downconverts a canceller input signal (e.g., obtained from the LNA output) with a first LO signal at a transmit frequency and provides a downconverted signal. The notch filter filters the downconverted signal to pass an undesired signal (e.g., a TX leakage signal) and attenuate a jammer and a desired signal in the canceller input signal. The upconverter upconverts the filtered signal with a second LO signal at the transmit frequency and provides a feedback signal. The feedback signal is subtracted at the input or output of the LNA to cancel the undesired signal.
摘要翻译：描述用于执行发射（TX）泄漏消除的技术。接收机包括低噪声放大器（LNA）和TX泄漏消除器。 LNA放大接收机输入信号并提供放大信号。 TX泄漏消除器包括下变频器，陷波滤波器和上变频器。下变频器以发射频率以第一LO信号下变频消除器输入信号（例如，从LNA输出获得），并提供下变频信号。陷波滤波器对下变频信号进行滤波以传递不期望的信号（例如，TX泄漏信号），并且在消除器输入信号中衰减干扰信号和期望信号。上变频器以滤波信号以发射频率的第二LO信号上变频，并提供反馈信号。在LNA的输入或输出处减去反馈信号以消除不需要的信号。

8. 发明申请

WO2010057037A2 LO GENERATION WITH DESKEWED INPUT OSCILLATOR SIGNAL 审中-公开
标题翻译： LO生成与输入振荡器信号
公开(公告)号：WO2010057037A2
公开(公告)日：2010-05-20
申请号：PCT/US2009/064456
申请日：2009-11-13
申请人： QUALCOMM INCORPORATED , PANIKKATH, Vinod, V. , GUDEM, Prasad, S. , CICCARELLI, Steven, C.
发明人： PANIKKATH, Vinod, V. , GUDEM, Prasad, S. , CICCARELLI, Steven, C.
IPC分类号： H03B19/00
CPC分类号： H03B19/12 , G01R13/02 , H03B27/00 , H03D7/16
摘要： Techniques for generating local oscillator (LO) signals are described. In one design, an apparatus may include a deskew circuit and a divider circuit. The deskew circuit may receive a differential input oscillator signal having timing skew and provide a differential output oscillator signal having reduced timing skew. The differential input oscillator signal may include first and second input oscillator signals, and the differential output oscillator signal may include first and second output oscillator signals. In one design, the deskew circuit may include first and second variable delay circuits that receive the first and second input oscillator signals, respectively, and provide the first and second output oscillator signals, respectively. Each output oscillator signal may have an adjustable delay selected to reduce timing skew. The divider circuit may divide the differential output oscillator signal in frequency and provide differential I and Q divided signals, which may be used to generate LO signals.
摘要翻译：描述用于产生本地振荡器（LO）信号的技术。在一种设计中，设备可以包括去歪斜电路和分频器电路。偏移电路可以接收具有定时偏移的差分输入振荡器信号，并提供具有减小的定时偏移的差分输出振荡器信号。差分输入振荡器信号可以包括第一和第二输入振荡器信号，并且差分输出振荡器信号可以包括第一和第二输出振荡器信号。在一种设计中，歪斜电路可以包括分别接收第一和第二输入振荡器信号的第一和第二可变延迟电路，并分别提供第一和第二输出振荡器信号。每个输出振荡器信号可以具有选择的可调延迟以减少定时偏移。分频器电路可以分频差分输出振荡器信号，并提供差分I和Q分频信号，可用于产生LO信号。

9. 发明申请

WO2009149082A3 METHODS AND APPARATUS FOR POWER REDUCTION IN A TRANSCEIVER 审中-公开
公开(公告)号：WO2009149082A3
公开(公告)日：2009-12-10
申请号：PCT/US2009/045971
申请日：2009-06-02
申请人： QUALCOMM INCORPORATED , GUDEM, Prasad, S. , CICCARELLI, Steven, C. , MOK, Ken Tsz Kin , KWOK, Sai, C.
发明人： GUDEM, Prasad, S. , CICCARELLI, Steven, C. , MOK, Ken Tsz Kin , KWOK, Sai, C.
IPC分类号： G05F1/56 , H04B1/16
摘要： An integrated circuit for achieving power reduction in a transceiver may include a jammer detector that determines an interference level corresponding to a received signal, and a transmit power detector that determines a required transmit power level for a transmitted signal. The integrated circuit may also include at least one of the following: a process monitor that determines process corners of components within the receiver and/or the transmitter, and a temperature monitor that determines a temperature of the receiver and/or the transmitter. The integrated circuit may also include a state machine. The state machine may transition the receiver from a high linearity mode to a low linearity mode if a set of operating conditions is satisfied. Similarly, the state machine may transition the transmitter from a high power mode to a low power mode if a set of operating conditions is satisfied.

10. 发明申请

WO2005079313A2 ADAPTIVE BIAS CURRENT CIRCUIT AND METHOD FOR AMPLIFIERS 审中-公开
标题翻译：自适应偏置电流电路和放大器的方法
公开(公告)号：WO2005079313A2
公开(公告)日：2005-09-01
申请号：PCT/US2005/004429
申请日：2005-02-14
申请人： THE REGENTS OF THE UNIVERSITY OF CALIFORNIA , LEUNG, Vincent, W. , GUDEM, Prasad, S. , LARSEN, Lawrence, E.
发明人： LEUNG, Vincent, W. , GUDEM, Prasad, S. , LARSEN, Lawrence, E.
CPC分类号： H03F1/0266 , H03F1/22 , H03F3/19 , H03F3/4508 , H03F2200/18 , H03F2200/451 , H03F2200/465 , H03F2203/45112 , H03F2203/45154 , H03F2203/45394 , H03F2203/45481
摘要： An adaptive bias method and circuits for amplifiers that provide a substantial current boost based at least partly upon a sensed input power of an amplifier circuit. Methods and circuits of the invention provide an additional bias current based upon the sensed input power. Circuits of the invention may be simple, area-efficient, low-power, stable and digitally-programmable. In addition, methods and circuits of the invention may be used with a number of amplifier circuit configurations, including amplifiers having either inductor and/or resistive degeneration.
摘要翻译：用于放大器的自适应偏置方法和电路，其至少部分地基于放大器电路的感测输入功率来提供实质的电流升压。本发明的方法和电路基于感测的输入功率提供额外的偏置电流。本发明的电路可以是简单的，区域有效的，低功率的，稳定的和数字可编程的。此外，本发明的方法和电路可以与许多放大器电路配置一起使用，包括具有电感和/或电阻退化的放大器。

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