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1. 发明申请

US20100041353A1 Techniques for Calibrating a Transceiver of a Communication Device 有权
标题翻译：用于校准通信设备的收发器的技术
公开(公告)号：US20100041353A1
公开(公告)日：2010-02-18
申请号：US12191831
申请日：2008-08-14
申请人： Ronald C. Alford , Leo G. Dehner , Richard B. Meador , Christian J. Rotchford
发明人： Ronald C. Alford , Leo G. Dehner , Richard B. Meador , Christian J. Rotchford
IPC分类号： H04B17/00
CPC分类号： H04B17/21 , H04B17/101 , H04B17/14
摘要： A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.
摘要翻译：用于校准无线通信设备的收发器的技术包括将收发器的发射机的输出节点选择性地耦合到收发器的接收机的输入节点。从发射机的输出节点向接收机的输入节点提供校准信号。校准信号与接收器进行下变频，以提供下变频校准信号。对下变频校准信号进行离散傅里叶变换。最后，基于对下变频校准信号的离散傅里叶变换的分析来确定一个或多个校正因子。使用校正因子中的至少一个来促进与收发器相关联的直流偏移的实质性消除。

2. 发明授权

US07986925B2 Techniques for calibrating a transceiver of a communication device 有权
标题翻译：用于校准通信设备的收发器的技术
公开(公告)号：US07986925B2
公开(公告)日：2011-07-26
申请号：US12191831
申请日：2008-08-14
申请人： Ronald C. Alford , Leo G. Dehner , Richard B. Meador , Christian J. Rotchford
发明人： Ronald C. Alford , Leo G. Dehner , Richard B. Meador , Christian J. Rotchford
IPC分类号： H03C1/62
CPC分类号： H04B17/21 , H04B17/101 , H04B17/14
摘要： A technique for calibrating a transceiver of a wireless communication device includes selectively coupling an output node of a transmitter of the transceiver to an input node of a receiver of the transceiver. A calibration signal is provided, from the output node of the transmitter, to the input node of the receiver. The calibration signal is down-converted, with the receiver, to provide a down-converted calibration signal. A discrete Fourier transform is performed on the down-converted calibration signal. Finally, one or more correction factors are determined based on an analysis of the discrete Fourier transform of the down-converted calibration signal. At least one of the correction factors is utilized to facilitate substantial cancellation of a direct current offset associated with the transceiver.
摘要翻译：用于校准无线通信设备的收发器的技术包括将收发器的发射机的输出节点选择性地耦合到收发器的接收机的输入节点。从发射机的输出节点向接收机的输入节点提供校准信号。校准信号与接收器进行下变频，以提供下变频校准信号。对下变频校准信号进行离散傅里叶变换。最后，基于对下变频校准信号的离散傅里叶变换的分析来确定一个或多个校正因子。使用校正因子中的至少一个来促进与收发器相关联的直流偏移的实质性消除。

3. 发明授权

US07957716B2 Baseband filters for use in wireless communication devices 有权
标题翻译：用于无线通信设备的基带滤波器
公开(公告)号：US07957716B2
公开(公告)日：2011-06-07
申请号：US12180936
申请日：2008-07-28
申请人： Jeff Ganger , Niall Duncan , Michael L. Gomez , Christian J. Rotchford
发明人： Jeff Ganger , Niall Duncan , Michael L. Gomez , Christian J. Rotchford
IPC分类号： H04B1/26 , H04B1/16
CPC分类号： H03H11/126 , H04B1/0475
摘要： An embodiment of a baseband filter in a transmitter subsystem of a wireless device comprises an operational amplifier (op-amp), a pole circuit, a feedback capacitor, and an active device. The op-amp is adapted to produce an amplified signal that includes noise gain produced by the op-amp. The pole circuit is electrically coupled with an output terminal of the op-amp, and is adapted to receive the amplified signal and to attenuate the noise gain to produce a filtered, amplified signal. The feedback capacitor is electrically coupled between the first pole circuit and an input terminal of the op-amp, and is adapted to compensate for a phase shift produced by the pole circuit. The active device is electrically coupled with the pole circuit, and is adapted to amplify the filtered, amplified signal and to produce a baseband filtered output signal.
摘要翻译：无线设备的发射机子系统中的基带滤波器的实施例包括运算放大器（op-amp），极点电路，反馈电容器和有源器件。该运算放大器适于产生包括由运算放大器产生的噪声增益的放大信号。极电路与运算放大器的输出端子电耦合，并且适于接收放大的信号并衰减噪声增益以产生经滤波的放大信号。反馈电容器电耦合在第一极电路和运算放大器的输入端之间，并且适于补偿由极电路产生的相移。有源器件与极电路电耦合，并且适于放大经滤波的放大信号并产生基带滤波的输出信号。

4. 发明申请

US20100022215A1 BASEBAND FILTERS FOR USE IN WIRELESS COMMUNICATION DEVICES 有权
标题翻译：用于无线通信设备的基带滤波器
公开(公告)号：US20100022215A1
公开(公告)日：2010-01-28
申请号：US12180936
申请日：2008-07-28
申请人： Jeff Ganger , Niall Duncan , Michael L. Gomez , Christian J. Rotchford
发明人： Jeff Ganger , Niall Duncan , Michael L. Gomez , Christian J. Rotchford
IPC分类号： H04B1/16
CPC分类号： H03H11/126 , H04B1/0475
摘要： An embodiment of a baseband filter in a transmitter subsystem of a wireless device comprises an operational amplifier (op-amp), a pole circuit, a feedback capacitor, and an active device. The op-amp is adapted to produce an amplified signal that includes noise gain produced by the op-amp. The pole circuit is electrically coupled with an output terminal of the op-amp, and is adapted to receive the amplified signal and to attenuate the noise gain to produce a filtered, amplified signal. The feedback capacitor is electrically coupled between the first pole circuit and an input terminal of the op-amp, and is adapted to compensate for a phase shift produced by the pole circuit. The active device is electrically coupled with the pole circuit, and is adapted to amplify the filtered, amplified signal and to produce a baseband filtered output signal.
摘要翻译：无线设备的发射机子系统中的基带滤波器的实施例包括运算放大器（op-amp），极点电路，反馈电容器和有源器件。该运算放大器适于产生包括由运算放大器产生的噪声增益的放大信号。极电路与运算放大器的输出端子电耦合，并且适于接收放大的信号并衰减噪声增益以产生经滤波的放大信号。反馈电容器电耦合在第一极电路和运算放大器的输入端之间，并且适于补偿由极电路产生的相移。有源器件与极电路电耦合，并且适于放大经滤波的放大信号并产生基带滤波的输出信号。

5. 发明申请

US20080165040A1 Calibrating a digital-to-analog converter 有权
公开(公告)号：US20080165040A1
公开(公告)日：2008-07-10
申请号：US11651858
申请日：2007-01-10
申请人： Christian J. Rotchford , Brandt Braswell , Jiangbo Gan , Michael L. Gomez , Gerald P. Miaille , Boris V. Razmyslovitch
发明人： Christian J. Rotchford , Brandt Braswell , Jiangbo Gan , Michael L. Gomez , Gerald P. Miaille , Boris V. Razmyslovitch
IPC分类号： H03M1/10
CPC分类号： H03M1/1047 , H03M1/66
摘要： Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.

6. 发明授权

US07443323B2 Calibrating a digital-to-analog converter 有权
标题翻译：校准数模转换器
公开(公告)号：US07443323B2
公开(公告)日：2008-10-28
申请号：US11651858
申请日：2007-01-10
申请人： Christian J. Rotchford , Brandt Braswell , Jiangbo Gan , Michael L. Gomez , Gerald P. Miaille , Boris V. Razmyslovitch
发明人： Christian J. Rotchford , Brandt Braswell , Jiangbo Gan , Michael L. Gomez , Gerald P. Miaille , Boris V. Razmyslovitch
IPC分类号： H03M1/10
CPC分类号： H03M1/1047 , H03M1/66
摘要： Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.
摘要翻译：用于校准数模转换器的方法和相应的系统包括选择数模转换器中的第一和第二代码区，其中第一和第二代码区被边界分隔开。此后，将波形序列输入到数模转换器，其中波形序列在边界处具有零偏移。然后调整第一和第二代码区之间的相对补偿值以减小数模转换器的输出中的失真。可以使用波形序列的三次谐波失真的大小来测量输出中的失真。调整相对补偿可以包括将数模转换器的输出转换为数字序列，对数字序列进行滤波，并测量数字序列中的谐波失真。

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