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1.发明授权Offset nulling for decreasing offset between currents in a differential signaling system 有权用于减小差分信号系统中电流之间的偏移量的偏移归零公开(公告)号：US07825714B1
公开(公告)日：2010-11-02
申请号：US12137984
申请日：2008-06-12
IPC分类号： H03L5/00
CPC分类号： H03K19/018528 , H03K5/003 , H03K19/00361
摘要： Systems and methods for nulling offsets in differential signaling systems are described. A first circuit may be configured to sense the difference between a first differential current and a second differential current and provide a sense signal to an adjustment circuit. The adjustment circuit may be configured to generate a correction signal based on the sense signal, where the correction signal is combined with the first differential current to reduce the offset between the first differential current and the second differential current. Alternately, the correction signal may be combined with the first and second differential currents to reduce the offset. The process may be repeated until the corrected first differential current and the second differential current are within a desired tolerance.
摘要翻译： 描述了差分信号系统中的零位补偿的系统和方法。 第一电路可以被配置为感测第一差分电流和第二差分电流之间的差异，并且向调节电路提供感测信号。 调整电路可以被配置为基于感测信号产生校正信号，其中校正信号与第一差分电流组合以减小第一差分电流和第二差分电流之间的偏移。 或者，校正信号可以与第一和第二差分电流组合以减小偏移。 可以重复该过程，直到校正的第一差分电流和第二差分电流在期望的公差内。
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公开(公告)号：US07868691B2
公开(公告)日：2011-01-11
申请号：US12351461
申请日：2009-01-09
申请人： John B. Groe , Michael Naone Farias , Eric Shapiro
发明人： John B. Groe , Michael Naone Farias , Eric Shapiro
CPC分类号： H03F3/211 , H03F3/45188 , H03F2203/45566 , H03F2203/45731
摘要： Variable gain commutating amplifier apparatus and methods for use in a polar modulator are described. The apparatus may include two or more commutating amplifier stages configured to be switched to an output load based on a desired amplitude and/or transmit power level. The amplifier stages may include cross-coupled differential pairs to cancel RF carrier feedthrough. An additional R-2R ladder circuit may be provided to further extend the dynamic range by reducing the output power at the lowest output stages.
摘要翻译： 描述了用于极性调制器的可变增益整流放大器装置和方法。 该装置可以包括两个或更多个整流放大器级，其被配置为基于期望的幅度和/或发射功率电平切换到输出负载。 放大器级可以包括交叉耦合的差分对以消除RF载波馈通。 可以提供另外的R-2R梯形电路以通过降低最低输出级的输出功率来进一步扩展动态范围。
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公开(公告)号：US07839231B1
公开(公告)日：2010-11-23
申请号：US12330446
申请日：2008-12-08
申请人： John B. Groe , Michael Naone Farias , Reza Kaznavi
发明人： John B. Groe , Michael Naone Farias , Reza Kaznavi
IPC分类号： H04L27/34
CPC分类号： H04L27/364
摘要： Apparatus and methods for improving the performance of a modulator, typically in an I/Q modulation system, are described. Input I and Q current modulation signals may be processed to generate a sign signal and a magnitude signal, with the magnitude signal selectively applied to the inputs of a mixer based on the sign signal so as to generate respective I and Q modulation signal components. These may then be combined to generate a composite modulation signal.
摘要翻译： 描述了通常在I / Q调制系统中改善调制器的性能的装置和方法。 可以处理输入I和Q电流调制信号以产生符号信号和幅度信号，其中幅度信号基于符号信号选择性地施加到混频器的输入，以便产生相应的I和Q调制信号分量。 然后可以将它们组合以产生复合调制信号。
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公开(公告)号：US20090231041A1
公开(公告)日：2009-09-17
申请号：US12351461
申请日：2009-01-09
申请人： John B. Groe , Michael Naone Farias , Eric Shapiro
发明人： John B. Groe , Michael Naone Farias , Eric Shapiro
IPC分类号： H03F3/72
CPC分类号： H03F3/211 , H03F3/45188 , H03F2203/45566 , H03F2203/45731
摘要： Variable gain commutating amplifier apparatus and methods for use in a polar modulator are described. The apparatus may include two or more commutating amplifier stages configured to be switched to an output load based on a desired amplitude and/or transmit power level. The amplifier stages may include cross-coupled differential pairs to cancel RF carrier feedthrough. An additional R-2R ladder circuit may be provided to further extend the dynamic range by reducing the output power at the lowest output stages.
摘要翻译： 描述了用于极性调制器的可变增益整流放大器装置和方法。 该装置可以包括两个或更多个整流放大器级，其被配置为基于期望的幅度和/或发射功率电平切换到输出负载。 放大器级可以包括交叉耦合的差分对以消除RF载波馈通。 可以提供另外的R-2R梯形电路以通过降低最低输出级的输出功率来进一步扩展动态范围。
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公开(公告)号：US07412213B1
公开(公告)日：2008-08-12
申请号：US11538396
申请日：2006-10-03
申请人： John B. Groe , Carl Thomas Hardin , Mahbuba Sheba
发明人： John B. Groe , Carl Thomas Hardin , Mahbuba Sheba
CPC分类号： H03G7/06 , H03C5/00 , H03F1/02 , H03F3/24 , H03G3/3042 , H04B2001/0408 , H04B2001/045 , H04L27/361
摘要： Envelope limiting for a polar modulator. A system is provided that intelligently compresses the amplitude modulation in a polar modulator so that it can be implemented with a single-stage variable gain amplifier. Limiting the amplitude modulation range on the low side prevents collapse of the transmit signal's time-varying envelope and eases circuit implementation. Limiting the amplitude modulation range on the high side reduces the peak-to-average ratio of the waveform and thereby improves the efficiency of the radio transmitter.
摘要翻译： 极性调制器的信封限制。 提供了一种智能地压缩极性调制器中的幅度调制的系统，使得其可以用单级可变增益放大器来实现。 限制低侧的幅度调制范围可以防止发射信号的时变包络的崩溃，并且简化电路实现。 限制高侧的幅度调制范围降低了波形的峰均比，从而提高了无线电发射机的效率。
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公开(公告)号：US07171170B2
公开(公告)日：2007-01-30
申请号：US10202501
申请日：2002-07-23
申请人： John B. Groe , Carl Thomas Hardin , Mahbuba Sheba
发明人： John B. Groe , Carl Thomas Hardin , Mahbuba Sheba
CPC分类号： H03G7/06 , H03C5/00 , H03F1/02 , H03F3/24 , H03G3/3042 , H04B2001/0408 , H04B2001/045 , H04L27/361
摘要： Envelope limiting for a polar modulator. A system is provided that intelligently compresses the amplitude modulation in a polar modulator so that it can be implemented with a single-stage variable gain amplifier. Limiting the amplitude modulation range on the low side prevents collapse of the transmit signal's time-varying envelope and eases circuit implementation. Limiting the amplitude modulation range on the high side reduces the peak-to-average ratio of the waveform and thereby improves the efficiency of the radio transmitter.
摘要翻译： 极性调制器的信封限制。 提供了一种智能地压缩极性调制器中的幅度调制的系统，使得其可以用单级可变增益放大器来实现。 限制低侧的幅度调制范围可以防止发射信号的时变包络的崩溃，并且简化电路实现。 限制高侧的幅度调制范围降低了波形的峰均比，从而提高了无线电发射机的效率。
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公开(公告)号：US07999608B1
公开(公告)日：2011-08-16
申请号：US12496419
申请日：2009-07-01
申请人： John B. Groe , Lucio Marc Facchni
发明人： John B. Groe , Lucio Marc Facchni
IPC分类号： H03K5/00
CPC分类号： H03F1/223 , H03F3/195 , H03F3/45188 , H03F2200/294 , H03F2200/391 , H03F2203/45386 , H03H7/03 , H03H7/12 , H03H7/1791 , H03H11/1213 , H03H11/245 , H03H2007/013 , H03H2011/0488
摘要： Apparatus and methods for providing integrated RF notch filter subsystems having enhanced Q values are described. An integrated notch filter includes an LC filter element and a Q-enhancement circuit coupled to the LC filter element, with the Q-enhancement circuit configured to offset resistive losses in the LC filter element to adjust the Q value of the filter system. A transceiver having multiple LNAs for various bands may be provided to a single notch filter system including a Q-enhancement circuit.
摘要翻译： 描述了用于提供具有增强的Q值的集成RF陷波滤波器子系统的装置和方法。 集成陷波滤波器包括耦合到LC滤波器元件的LC滤波器元件和Q增强电路，其中Q增强电路被配置为抵消LC滤波器元件中的电阻损耗以调整滤波器系统的Q值。 可以向包括Q增强电路的单陷波滤波器系统提供具有用于各种频带的多个LNA的收发器。
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公开(公告)号：US07764139B1
公开(公告)日：2010-07-27
申请号：US12324992
申请日：2008-11-28
申请人： John B. Groe
发明人： John B. Groe
CPC分类号： H03C5/00
摘要： Apparatus and methods for adjusting spectral characteristics of a polar modulation signal in a polar modulator are described. A detection circuit is configured to determine when an FM signal component of the modulation signal exceeds a threshold value. The output of the detection circuit is coupled with FM and AM mapping circuits to selectively map the FM signal component and an AM signal component of the modulation signal to mapped signals, thereby reducing FM deviation.
摘要翻译： 描述了用于调节极性调制器中的极性调制信号的频谱特性的装置和方法。 检测电路被配置为确定调制信号的FM信号分量何时超过阈值。 检测电路的输出与FM和AM映射电路耦合，以选择性地将FM信号分量和调制信号的AM信号分量映射到映射信号，从而减少FM偏差。
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公开(公告)号：US07679468B1
公开(公告)日：2010-03-16
申请号：US11829817
申请日：2007-07-27
申请人： John B. Groe , Kenneth Scott Walley
发明人： John B. Groe , Kenneth Scott Walley
IPC分类号： H03C3/06
CPC分类号： H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/0958 , H03C3/0991
摘要： An apparatus for providing a two point phase/frequency modulation system is disclosed herein. The apparatus includes a first network configured to introduce an offset to center a signal applied to a VCO. The apparatus further includes a second network configured to set a gain of the VCO. A phase tracking network is configured to dynamically adjust the offset and the gain.
摘要翻译： 本文公开了一种用于提供双点相位/频率调制系统的装置。 该装置包括被配置为引入偏移以使施加到VCO的信号居中的第一网络。 该装置还包括被配置为设置VCO的增益的第二网络。 相位跟踪网络配置为动态调整偏移和增益。
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公开(公告)号：US07522005B1
公开(公告)日：2009-04-21
申请号：US11829828
申请日：2007-07-27
申请人： John B. Groe , Kenneth Scott Walley
发明人： John B. Groe , Kenneth Scott Walley
CPC分类号： H03C3/08 , H03C3/0908 , H03L2207/06
摘要： An apparatus providing a phase/frequency modulation system is disclosed herein. The apparatus includes a first circuit configured to introduce an offset to center a signal applied to a VCO. The apparatus further includes a second circuit configured to set a gain of the VCO. A frequency tracking network is configured to dynamically adjust one or both of the offset and the gain.
摘要翻译： 本文公开了一种提供相位/频率调制系统的装置。 该装置包括被配置为引入偏置以使施加到VCO的信号居中的第一电路。 该装置还包括被配置为设置VCO的增益的第二电路。 频率跟踪网络被配置为动态地调整偏移和增益中的一个或两个。
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