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23 条记录 (耗时 0.025 秒)

    Closed loop power control for a wireless transmitter
    1.
    发明授权
    Closed loop power control for a wireless transmitter 失效
    无线发射机的闭环功率控制

    公开(公告)号：US08774738B2

    公开(公告)日：2014-07-08

    申请号：US13452756

    申请日：2012-04-20

    申请人： Sriraman Dakshinamurthy ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

    发明人： Sriraman Dakshinamurthy ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

    IPC分类号： H04B17/00

    CPC分类号： H03G3/3042 ,  H04B17/13

    摘要： Embodiments of the present disclosure provide systems and methods for estimating gain and phase error in a wireless transmitter. Embodiments of the present disclosure provide a gain and phase controller that uses a digital gain and phase estimator to jointly estimate both gain and phase. The forward and feedback signals of a wireless transmitter are digitized using analog to digital (ADC) converters. The digital signals are correlated with each other to dynamically extract gain and phase estimates of the loop. The gain and phase estimates are used to correct gain and phase errors in the wireless transmitter.

    摘要翻译： 本公开的实施例提供了用于估计无线发射机中的增益和相位误差的系统和方法。 本公开的实施例提供增益和相位控制器，其使用数字增益和相位估计器来共同估计增益和相位。 无线发射机的正向和反馈信号使用模数（ADC）转换器进行数字化。 数字信号彼此相关，以动态地提取循环的增益和相位估计。 增益和相位估计用于校正无线发射机中的增益和相位误差。

    Closed Loop Power Control for a Wireless Transmitter
    2.
    发明申请
    Closed Loop Power Control for a Wireless Transmitter 失效
    无线发射机的闭环功率控制

    公开(公告)号：US20120270511A1

    公开(公告)日：2012-10-25

    申请号：US13452756

    申请日：2012-04-20

    申请人： Sriraman DAKSHINAMURTHY ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

    发明人： Sriraman DAKSHINAMURTHY ,  Mohamed Mostafa ,  Derek Shaeffer ,  Dennis Pu ,  Peter Capofreddi

    IPC分类号： H04B17/00 ,  H03G3/00

    CPC分类号： H03G3/3042 ,  H04B17/13

    摘要： Embodiments of the present disclosure provide systems and methods for estimating gain and phase error in a wireless transmitter. Embodiments of the present disclosure provide a gain and phase controller that uses a digital gain and phase estimator to jointly estimate both gain and phase. The forward and feedback signals of a wireless transmitter are digitized using analog to digital (ADC) converters. The digital signals are correlated with each other to dynamically extract gain and phase estimates of the loop. The gain and phase estimates are used to correct gain and phase errors in the wireless transmitter.

    摘要翻译： 本公开的实施例提供了用于估计无线发射机中的增益和相位误差的系统和方法。 本公开的实施例提供增益和相位控制器，其使用数字增益和相位估计器来共同估计增益和相位。 无线发射机的正向和反馈信号使用模数（ADC）转换器进行数字化。 数字信号彼此相关，以动态地提取循环的增益和相位估计。 增益和相位估计用于校正无线发射机中的增益和相位误差。

    Compensation of an asymmetric frequency response of a radio
    4.
    发明申请
    Compensation of an asymmetric frequency response of a radio 失效
    收音机的不对称频率响应的补偿

    公开(公告)号：US20090258615A1

    公开(公告)日：2009-10-15

    申请号：US12082387

    申请日：2008-04-10

    申请人： Peter Capofreddi ,  Sriraman Dakshinamurthy ,  Derek Shaeffer

    发明人： Peter Capofreddi ,  Sriraman Dakshinamurthy ,  Derek Shaeffer

    IPC分类号： H04B1/04

    CPC分类号： H03F3/45183 ,  H03F1/34 ,  H03F3/24 ,  H03F3/245 ,  H03F3/45475 ,  H03F2203/45138 ,  H03F2203/45512 ,  H03F2203/45652 ,  H04B2001/0433

    摘要： A method and apparatus of compensating for an asymmetric frequency response of a radio are disclosed. One method includes estimating a slope control signal, the slope control signal indicating a slope of a frequency response of an amplifier chain of the radio. A difference between gain at positive frequencies and gain at negative frequencies of a complex baseband signal is adjusted with the slope control signal, wherein the complex signal includes an I component and a Q component. The adjusted complex baseband signal is frequency up-converted into a radio signal. The radio signal is amplified by the amplifier chain. The amplified radio signal is transmitted.

    摘要翻译： 公开了一种补偿无线电装置的不对称频率响应的方法和装置。 一种方法包括估计斜率控制信号，该斜率控制信号指示无线电装置的放大器链的频率响应的斜率。 利用斜率控制信号调整正频率增益与负基频信号增益之间的差异，其中复信号包括I分量和Q分量。 经调整的复基带信号被上变频成无线电信号。 无线电信号由放大器链放大。 发射放大的无线电信号。

    Phase rotation estimation
    6.
    发明申请
    Phase rotation estimation 有权
    相位旋转估计

    公开(公告)号：US20050249321A1

    公开(公告)日：2005-11-10

    申请号：US10841290

    申请日：2004-05-06

    申请人： Joel Dawson ,  Sriraman Dakshinamurthy ,  Derek Shaeffer

    发明人： Joel Dawson ,  Sriraman Dakshinamurthy ,  Derek Shaeffer

    IPC分类号： H03F1/32 ,  H04L7/00

    CPC分类号： H03F1/32

    摘要： Apparatus, systems, and methods implementing techniques for estimating a relative rotation between a first complex signal and a second complex signal. The first complex signal is quantized to produce a quantized signal, and the quantized signal and an additional signal are combined, where the additional signal corresponds to the second complex signal. An estimate of a relative rotation between the first complex signal and the second complex signal is generated in accordance with the combined signal.

    摘要翻译： 实现用于估计第一复信号和第二复信号之间的相对旋转的技术的装置，系统和方法。 第一复信号被量化以产生量化信号，并且量化信号和附加信号被组合，其中附加信号对应于第二复信号。 根据组合信号产生第一复信号和第二复信号之间的相对旋转的估计。

    Increasing the linearity of a transconductance cell
    8.
    发明授权
    Increasing the linearity of a transconductance cell 有权
    增加跨导电池的线性度

    公开(公告)号：US07295068B2

    公开(公告)日：2007-11-13

    申请号：US11134684

    申请日：2005-05-19

    申请人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

    发明人： Peter Capofreddi ,  Arvin Ramesh Shahani ,  Derek Shaeffer ,  Korhan Titizer

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F3/45672

    摘要： A transconductance cell is disclosed that includes a first transistor and a second transistor. A regulator regulates an average voltage in response to a reference voltage, where the average voltage corresponds to the average of a voltage at a bias terminal of the first transistor and a voltage at a bias terminal of the second transistor. A mixer including the transconductance cell is also disclosed. In the mixer, the transconductance cell receives a differential input voltage and produces a differential output current. The mixer also includes one or more switches that multiply the differential output current with an oscillator signal. A method is disclosed that includes measuring an average voltage of a voltage at a bias terminal of a first transistor and a voltage at a bias terminal of a second transistor and regulating the average voltage responsive to the measured average voltage and a reference voltage.

    摘要翻译： 公开了一种跨导单元，其包括第一晶体管和第二晶体管。 调节器响应于参考电压来调节平均电压，其中平均电压对应于第一晶体管的偏置端子处的电压的平均值和第二晶体管的偏置端子处的电压。 还公开了包括跨导电池的混合器。 在混频器中，跨导单元接收差分输入电压并产生差分输出电流。 混频器还包括一个或多个将差分输出电流与振荡器信号相乘的开关。 公开了一种方法，其包括测量第一晶体管的偏置端子处的电压的平均电压和第二晶体管的偏置端子处的电压，并响应于测量的平均电压和参考电压来调节平均电压。

    Increasing the linearity of a transconductance cell
    9.
    发明申请
    Increasing the linearity of a transconductance cell 有权
    增加跨导电池的线性度

    公开(公告)号：US20060261894A1

    公开(公告)日：2006-11-23

    申请号：US11134684

    申请日：2005-05-19

    申请人： Peter Capofreddi ,  Arvin Shahani ,  Derek Shaeffer ,  Korhan Titizer

    发明人： Peter Capofreddi ,  Arvin Shahani ,  Derek Shaeffer ,  Korhan Titizer

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F3/45672

    摘要： A transconductance cell is disclosed that includes a first transistor and a second transistor. A regulator regulates an average voltage in response to a reference voltage, where the average voltage corresponds to the average of a voltage at a bias terminal of the first transistor and a voltage at a bias terminal of the second transistor. A mixer including the transconductance cell is also disclosed. In the mixer, the transconductance cell receives a differential input voltage and produces a differential output current. The mixer also includes one or more switches that multiply the differential output current with an oscillator signal. A method is disclosed that includes measuring an average voltage of a voltage at a bias terminal of a first transistor and a voltage at a bias terminal of a second transistor and regulating the average voltage responsive to the measured average voltage and a reference voltage.

    摘要翻译： 公开了一种跨导单元，其包括第一晶体管和第二晶体管。 调节器响应于参考电压来调节平均电压，其中平均电压对应于第一晶体管的偏置端子处的电压的平均值和第二晶体管的偏置端子处的电压。 还公开了包括跨导电池的混合器。 在混频器中，跨导单元接收差分输入电压并产生差分输出电流。 混频器还包括一个或多个将差分输出电流与振荡器信号相乘的开关。 公开了一种方法，其包括测量第一晶体管的偏置端子处的电压的平均电压和第二晶体管的偏置端子处的电压，并响应于测量的平均电压和参考电压来调节平均电压。

    GYROSCOPE WITH PHASE AND DUTY-CYCLE LOCKED LOOP
    10.
    发明申请
    GYROSCOPE WITH PHASE AND DUTY-CYCLE LOCKED LOOP 有权
    具有相位和占空比锁定环的陀螺仪

    公开(公告)号：US20130099836A1

    公开(公告)日：2013-04-25

    申请号：US13335815

    申请日：2011-12-22

    申请人： Derek Shaeffer ,  Ahingsa Soukhaphanith

    发明人： Derek Shaeffer ,  Ahingsa Soukhaphanith

    IPC分类号： H03L7/08 ,  G01C19/04

    CPC分类号： G01C19/5776 ,  H03L7/08 ,  H03L7/089 ,  H03L7/0893 ,  Y10T74/12

    摘要： A system and method in accordance with the present invention provides a gyroscope incorporating an improved PLL technique. The improved PLL auto-corrects its own reference low-frequency noise, thereby eliminating this source of noise, improving the noise performance of the gyroscope and allowing a compact implementation. The net result is a gyroscope with improved bias stability that can meet noise requirements with a smaller footprint.

    摘要翻译： 根据本发明的系统和方法提供了结合改进的PLL技术的陀螺仪。 改进的PLL自动校正其自己的参考低频噪声，从而消除了噪声源，提高了陀螺仪的噪声性能，并实现了紧凑的实现。 最终的结果是具有改进的偏置稳定性的陀螺仪，可以以更小的占地面积满足噪声要求。