公开(公告)号：US07221921B2

公开(公告)日：2007-05-22

申请号：US10730404

申请日：2003-12-08

申请人： James Maligeorgos ,  Augusto M. Marques ,  Lysander Lim ,  G. Tyson Tuttle ,  Aslamali A. Rafi ,  Tod Paulus ,  Gregory T. Uehara ,  Jeffrey W. Scott ,  Richard T. Behrens ,  Donald A. Kerth ,  G. Diwakar Vishakhadatta ,  Vishnu S. Srinivasan ,  Caiyi Wang

发明人： James Maligeorgos ,  Augusto M. Marques ,  Lysander Lim ,  G. Tyson Tuttle ,  Aslamali A. Rafi ,  Tod Paulus ,  Gregory T. Uehara ,  Jeffrey W. Scott ,  Richard T. Behrens ,  Donald A. Kerth ,  G. Diwakar Vishakhadatta ,  Vishnu S. Srinivasan ,  Caiyi Wang

IPC分类号： H04B7/00 ,  H04B1/40 ,  H03J7/04

CPC分类号： H04B1/30 ,  H03J2200/10 ,  H04L27/0002

摘要： Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as one or more separate integrated circuits. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may include at least one variable capacitance device and may be employed to generate a reference signal with adjustable frequency. The adjustable reference signal may be provided to other components of the RF apparatus and/or the RF apparatus may be configured to provide the adjustable reference signal to baseband processor circuitry. Automatic frequency control (AFC) circuitry may be integrated with other components of RF circuitry and may generate frequency control signals for the frequency modification circuitry based on, for example, a signal received from a temperature sensor. Digital-to-analog converter (DAC) circuitry may be integrated with other components of RF circuitry to enable all-digital frequency control communications from baseband processor circuitry to RF circuitry.

公开(公告)号：US07242912B2

公开(公告)日：2007-07-10

申请号：US10631166

申请日：2003-07-31

申请人： James Maligeorgos ,  Augusto M. Marques ,  Lysander Lim ,  G. Tyson Tuttle ,  Aslamali A. Rafi ,  Tod Paulus ,  Gregory T. Uehara ,  Jeffrey W. Scott ,  Richard T. Behrens ,  Donald A. Kerth ,  G. Diwakar Vishakhadatta ,  Vishnu S. Srinivasan ,  Caiyi Wang

发明人： James Maligeorgos ,  Augusto M. Marques ,  Lysander Lim ,  G. Tyson Tuttle ,  Aslamali A. Rafi ,  Tod Paulus ,  Gregory T. Uehara ,  Jeffrey W. Scott ,  Richard T. Behrens ,  Donald A. Kerth ,  G. Diwakar Vishakhadatta ,  Vishnu S. Srinivasan ,  Caiyi Wang

IPC分类号： H04B1/40

CPC分类号： H04B1/0003 ,  H03L7/085 ,  H03L7/087 ,  H03L7/091 ,  H03L7/099 ,  H03L7/187 ,  H03L7/199 ,  H03L7/23 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： Components of a radio-frequency (RF) apparatus including transceiver circuitry and frequency modification circuitry of a crystal oscillator circuit that generates a reference signal with adjustable frequency may be partitioned in a variety of ways, for example, as one or more separate integrated circuits. The frequency modification circuitry may be implemented as part of a crystal oscillator circuit that includes digitally controlled crystal oscillator (“DCXO”) circuitry and a crystal. The frequency modification circuitry may include at least one variable capacitance device and may be employed to generate a reference signal with adjustable frequency. The adjustable reference signal may be provided to other components of the RF apparatus and/or the RF apparatus may be configured to provide the adjustable reference signal to baseband processor circuitry. Automatic frequency control (AFC) circuitry may be integrated with other components of RF circuitry and may generate frequency control signals for the frequency modification circuitry based on, for example, a signal received from a temperature sensor. Digital-to-analog converter (DAC) circuitry may be integrated with other components of RF circuitry to enable all-digital frequency control communications from baseband processor circuitry to RF circuitry.

摘要翻译： 包括生成具有可变频率的参考信号的晶体振荡器电路的收发器电路和频率修改电路的射频（RF）设备的组件可以以各种方式被划分，例如作为一个或多个单独的集成电路。 频率修改电路可以被实现为包括数字控制的晶体振荡器（“DCXO”）电路和晶体的晶体振荡器电路的一部分。 频率修改电路可以包括至少一个可变电容器件，并且可以用于产生具有可调频率的参考信号。 可调参考信号可以被提供给RF装置的其他部件，和/或RF装置可以被配置为向基带处理器电路提供可调参考信号。 自动频率控制（AFC）电路可以与RF电路的其它组件集成，并且可以基于例如从温度传感器接收的信号来生成用于频率修改电路的频率控制信号。 数模转换器（DAC）电路可以与RF电路的其他部件集成，以实现从基带处理器电路到RF电路的全数字频率控制通信。

公开(公告)号：US07138858B2

公开(公告)日：2006-11-21

申请号：US10079058

申请日：2002-02-19

申请人： Augusto M. Marques ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： Augusto M. Marques ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： G01R19/00 ,  H03F3/38

CPC分类号： H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A buffer circuitry buffers a radio-frequency (RF) signal. The buffer circuitry includes a complementary pair of switches and a power source. The a complementary pair of switches has an input terminal and output terminal. The input terminal of the complementary pair of switches responds to the RF signal. The output terminal of the complementary pair of switches couples to an output of the buffer circuitry. The power source includes a capacitor coupled to a current source. The power source couples to the complementary pair of switches. The power source supplies power to the complementary pair of switches in a manner that the buffer circuitry supplies a substantially constant power level at its output.

公开(公告)号：US07228109B2

公开(公告)日：2007-06-05

申请号：US10074676

申请日：2002-02-12

申请人： Tod Paulus ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： Tod Paulus ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： H04B1/40

CPC分类号： H04L25/061 ,  H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency receiver circuitry includes a down-converter circuitry, an analog-to-digital converter circuitry, and a DC offset reduction circuitry. The down-converter circuitry accepts a received radio-frequency signal and processes the radio-frequency signal to provide an in-phase down-converted signal and a quadrature down-converted signal to the analog-to-digital converter circuitry. The analog-to-digital converter circuitry converts the in-phase and quadrature down-converted signals to an in-phase digital output signal and a quadrature digital output signal, respectively. The DC offset reduction circuitry couples to the analog-to-digital converter circuitry, and tends to reduce a DC offset transmitted to the in-phase and quadrature digital output signals.

摘要翻译： 射频接收器电路包括下变频器电路，模数转换器电路和DC偏移减小电路。 下变换器电路接收接收的射频信号并处理射频信号以向模数转换器电路提供同相下变频信号和正交下变频信号。 模数转换器电路将同相和正交下变频信号分别转换为同相数字输出信号和正交数字输出信号。 DC偏移降低电路耦合到模数转换器电路，并且倾向于减少传输到同相和正交数字输出信号的DC偏移。

公开(公告)号：US07024221B2

公开(公告)日：2006-04-04

申请号：US10075099

申请日：2002-02-12

申请人： Tod Paulus ,  Richard T. Behrens ,  Vishnu S. Srinivasan ,  Mark S. Spurbeck ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

发明人： Tod Paulus ,  Richard T. Behrens ,  Vishnu S. Srinivasan ,  Mark S. Spurbeck ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

IPC分类号： H04B1/38 ,  H04M1/00

CPC分类号： H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry coupled together. The receiver analog circuitry receives an RF signal. The receiver analog circuitry processes the received RF signal and generates a digital signal that it provides to the receiver digital circuitry. The receiver digital circuitry includes a digital down-converter circuitry that mixes the digital signal provided by a receiver analog circuitry with a digital intermediate frequency (IF) local oscillator signal to generate a digital down-converted signal. The receiver digital circuitry also includes a digital filter circuitry that filters the digital down-converted signal to generate a filtered digital signal. The digital filter circuitry provides a notch at a frequency that corresponds to a residual DC offset of the receiver analog circuitry.

公开(公告)号：US06993314B2

公开(公告)日：2006-01-31

申请号：US10074591

申请日：2002-02-13

申请人： Lysander Lim ,  Caiyi Wang ,  David R. Welland ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： Lysander Lim ,  Caiyi Wang ,  David R. Welland ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： H04N1/28

CPC分类号： H04B1/0003 ,  H03L7/085 ,  H03L7/087 ,  H03L7/091 ,  H03L7/099 ,  H03L7/187 ,  H03L7/199 ,  H03L7/23 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency (RF) apparatus capable of transmitting RF signals includes transmitter path circuitry. The transmitter path circuitry includes a voltage-controlled oscillator (VCO) circuitry. The VCO circuitry generates a first signal that has a first frequency. A divider circuitry couples to the VCO circuitry and, in response to the first signal, the divider circuitry generates a second signal that has a second frequency. The frequency of the second signal equals the frequency of the first signal divided by a number.

公开(公告)号：US20100166124A1

公开(公告)日：2010-07-01

申请号：US12715361

申请日：2010-03-01

申请人： Richard T. Behrens ,  Tod Paulus ,  Mark S. Spurbeck ,  Vishnu S. Srinivasan ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

发明人： Richard T. Behrens ,  Tod Paulus ,  Mark S. Spurbeck ,  Vishnu S. Srinivasan ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

IPC分类号： H04L27/00 ,  H04B1/10

CPC分类号： H04B1/28 ,  H04B1/0003 ,  H04B1/38 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry. The receiver analog circuitry resides within a first integrated circuit and the receiver digital circuitry resides within a second integrated circuit. The second integrated circuit couples to the first integrated circuit via a one-bit digital interface. The receiver analog circuitry receives an RF signal and processes the received RF signal to generate a digital signal. The receiver analog circuitry provides the digital signal to the receiver digital circuitry. The receiver digital circuitry includes a digital down-converter circuitry that mixes the digital signal with an intermediate frequency (IF) local oscillator (LO) signal to generate a digital down-converted signal. The receiver digital circuitry also includes a digital filter circuitry that filters the digital down-converted signal to generate a filtered digital signal.

摘要翻译： 射频（RF）接收机包括接收机模拟电路和接收机数字电路。 接收器模拟电路驻留在第一集成电路内，并且接收器数字电路位于第二集成电路内。 第二集成电路通过一位数字接口耦合到第一集成电路。 接收机模拟电路接收RF信号并处理所接收的RF信号以产生数字信号。 接收机模拟电路将数字信号提供给接收机数字电路。 接收机数字电路包括数字下变频器电路，其将数字信号与中频（IF）本地振荡器（LO）信号混合以产生数字下变频信号。 接收机数字电路还包括数字滤波器电路，其对数字下变频信号进行滤波以产生经滤波的数字信号。

公开(公告)号：US07177610B2

公开(公告)日：2007-02-13

申请号：US10081121

申请日：2002-02-22

申请人： Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  Donald A. Kerth ,  Richard T. Behrens ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  Donald A. Kerth ,  Richard T. Behrens ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A low-noise current reference circuitry includes a voltage source, a current source, and a controller. The voltage source generates a reference voltage. The current source provides a low-noise output current in response to a control signal. The controller provides the control signal based at least in part on the relative magnitudes of the reference voltage and a voltage derived from the output current. A low-noise voltage reference circuitry includes a reference voltage source, a voltage source, and a controller. The reference voltage source generates a reference voltage. The voltage source provides a low-noise output voltage in response to a control signal. The controller provides the control signal based at least in part on the relative magnitudes of the output voltage and the reference voltage.

摘要翻译： 低噪声电流参考电路包括电压源，电流源和控制器。 电压源产生参考电压。 电流源提供响应于控制信号的低噪声输出电流。 控制器至少部分地基于参考电压的相对幅度和从输出电流导出的电压来提供控制信号。 低噪声电压参考电路包括参考电压源，电压源和控制器。 参考电压源产生参考电压。 电压源响应于控制信号提供低噪声输出电压。 控制器至少部分地基于输出电压和参考电压的相对幅度提供控制信号。

公开(公告)号：US08467483B2

公开(公告)日：2013-06-18

申请号：US10388206

申请日：2003-03-13

申请人： G. Diwakar Vishakhadatta ,  Donald A. Kerth ,  Jeffrey W. Scott ,  Richard T. Behrens ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： G. Diwakar Vishakhadatta ,  Donald A. Kerth ,  Jeffrey W. Scott ,  Richard T. Behrens ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： H03D1/04 ,  H04L25/00

CPC分类号： H04B1/0007 ,  H04B1/0003 ,  H04B1/0039 ,  H04B1/28 ,  H04B1/406

摘要： A radio-frequency apparatus includes an integrated circuit. The integrated circuit includes receiver analog circuitry, receiver digital circuitry, a digital-to-analog converter, and a signal selector. The receiver analog circuitry receives radio-frequency signals, and provides a first digital signal. The receiver digital circuitry receives the first digital signal, and provides a second digital signal. The digital-to-analog converter converts the second digital signal into a first analog signal. The signal selector receives the second digital signal and the first analog signal, and selectively provides one of the second digital signal and the first analog signal as an output signal of the integrated circuit.

摘要翻译： 射频装置包括集成电路。 集成电路包括接收机模拟电路，接收机数字电路，数模转换器和信号选择器。 接收机模拟电路接收射频信号，并提供第一数字信号。 接收机数字电路接收第一数字信号，并提供第二数字信号。 数模转换器将第二数字信号转换为第一模拟信号。 信号选择器接收第二数字信号和第一模拟信号，并且选择性地提供第二数字信号和第一模拟信号中的一个作为集成电路的输出信号。

公开(公告)号：US07702362B2

公开(公告)日：2010-04-20

申请号：US11287995

申请日：2005-11-28

申请人： Richard T. Behrens ,  Tod Paulus ,  Mark S. Spurbeck ,  Vishnu S. Srinivasan ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

发明人： Richard T. Behrens ,  Tod Paulus ,  Mark S. Spurbeck ,  Vishnu S. Srinivasan ,  Donald A. Kerth ,  Jeffrey W. Scott ,  G. Tyson Tuttle ,  G. Diwakar Vishakhadatta

IPC分类号： H04B1/38 ,  H04M1/00

CPC分类号： H04B1/28 ,  H04B1/0003 ,  H04B1/38 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency (RF) receiver includes a receiver analog circuitry and a receiver digital circuitry. The receiver analog circuitry resides within a first integrated circuit and the receiver digital circuitry resides within a second integrated circuit. The second integrated circuit couples to the first integrated circuit via a one-bit digital interface. The receiver analog circuitry receives an RF signal and processes the received RF signal to generate a digital signal. The receiver analog circuitry provides the digital signal to the receiver digital circuitry. The receiver digital circuitry includes a digital down-converter circuitry that mixes the digital signal with an intermediate frequency (IF) local oscillator (LO) signal to generate a digital down-converted signal. The receiver digital circuitry also includes a digital filter circuitry that filters the digital down-converted signal to generate a filtered digital signal.

摘要翻译： 射频（RF）接收机包括接收机模拟电路和接收机数字电路。 接收器模拟电路驻留在第一集成电路内，并且接收器数字电路位于第二集成电路内。 第二集成电路通过一位数字接口耦合到第一集成电路。 接收机模拟电路接收RF信号并处理所接收的RF信号以产生数字信号。 接收机模拟电路将数字信号提供给接收机数字电路。 接收机数字电路包括数字下变频器电路，其将数字信号与中频（IF）本地振荡器（LO）信号混合以产生数字下变频信号。 接收机数字电路还包括数字滤波器电路，其对数字下变频信号进行滤波以产生经滤波的数字信号。