公开(公告)号：US07272375B2

公开(公告)日：2007-09-18

申请号：US10881926

申请日：2004-06-30

Applicant: G. Tyson Tuttle ,  Dan B. Kasha

Inventor： G. Tyson Tuttle ,  Dan B. Kasha

IPC: H04B1/28

CPC classification number: H04B1/18 ,  H04B1/30

Abstract: An integrated low-IF (low intermediate frequency) terrestrial broadcast receiver and associated method are disclosed that provide an advantageous and cost-efficient solution. The integrated receiver includes a mixer, local oscillator generation circuitry, low-IF conversion circuitry, and DSP circuitry. And the integrated receiver is particularly suited for small, portable devices and the reception of terrestrial audio broadcasts, such as FM and AM terrestrial audio broadcast, in such portable devices.

Abstract translation: 公开了一种集成的低中频（低中频）地面广播接收机和相关方法，其提供了有利且具有成本效益的解决方案。 集成接收器包括混频器，本地振荡器产生电路，低IF转换电路和DSP电路。 并且集成接收机特别适用于小型便携式设备以及在这种便携式设备中接收地面音频广播，诸如FM和AM地面音频广播。

公开(公告)号：US07242912B2

公开(公告)日：2007-07-10

申请号：US10631166

申请日：2003-07-31

Applicant: 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

Inventor： 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: H04B1/40

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US07177617B2

公开(公告)日：2007-02-13

申请号：US10749012

申请日：2003-12-30

Applicant: Donald A. Kerth ,  G. Tyson Tuttle

Inventor： Donald A. Kerth ,  G. Tyson Tuttle

IPC: H04B1/10

CPC classification number: H04B1/0007 ,  H04B1/28

Abstract: A method and apparatus for enhancing signal quality within a wireless receiver are disclosed. An image of a desired signal is down-converted to a baseband signal by a digital down converter. The energy of the baseband signal is subsequently determined. If the energy of the baseband signal is equal to or greater than a predetermined threshold, then the IF is swapped for any incoming signals. If the energy of the baseband signal is less than the predetermined threshold, then the IF is maintained for any incoming signals.

Abstract translation: 公开了一种用于增强无线接收机内的信号质量的方法和装置。 所需信号的图像由数字下变频器下变频为基带信号。 随后确定基带信号的能量。 如果基带信号的能量等于或大于预定阈值，则IF被交换用于任何输入信号。 如果基带信号的能量小于预定阈值，则对于任何输入信号都保持IF。

公开(公告)号：US07138858B2

公开(公告)日：2006-11-21

申请号：US10079058

申请日：2002-02-19

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

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

IPC: G01R19/00 ,  H03F3/38

CPC classification number: H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

Abstract: 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：US07092675B2

公开(公告)日：2006-08-15

申请号：US10075098

申请日：2002-02-13

Applicant: 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

Inventor： 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: H04B1/40

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

Abstract: A radio-frequency (RF) apparatus capable of transmitting RF signals includes transmitter path circuitry. The transmitter path circuitry includes a voltage-controlled oscillator (VCO) that generates an output signal. The frequency of the output signal of the VCO circuitry is adjustable in response to a first control signal and a second control signal. The transmitter path circuitry also includes a first feedback circuitry and a second feedback circuitry that are responsive to the output signal of the VCO circuitry. The first feedback circuitry provides the first control signal to the VCO circuitry. The first control signal coarsely adjusts the frequency of the output signal of the VCO circuitry to a desired frequency. The second feedback circuitry supplies the second control signal to the VCO circuitry. The second control signal fine tunes the frequency of the output signal of the voltage-controlled oscillator circuitry to the desired frequency.

Abstract translation: 能够发送RF信号的射频（RF）装置包括发射机路径电路。 发射机路径电路包括产生输出信号的压控振荡器（VCO）。 VCO电路的输出信号的频率可响应于第一控制信号和第二控制信号而调节。 发射机路径电路还包括响应于VCO电路的输出信号的第一反馈电路和第二反馈电路。 第一反馈电路向VCO电路提供第一控制信号。 第一控制信号粗略地将VCO电路的输出信号的频率调整到期望的频率。 第二反馈电路将第二控制信号提供给VCO电路。 第二控制信号将压控振荡器电路的输出信号的频率调谐到期望的频率。

公开(公告)号：US07035611B2

公开(公告)日：2006-04-25

申请号：US10079057

申请日：2002-02-19

Applicant: Eric R. Garlepp ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

Inventor： Eric R. Garlepp ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC: H04B1/06

CPC classification number: H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

Abstract: A radio-frequency (RF) apparatus includes front-end circuitry. The front-end circuitry includes a filter circuitry and an impedance matching circuitry. The filter circuitry has a differential output that has an output impedance. The filter circuitry filters signals outside a signal band of interest. The impedance matching network has a differential input coupled to the output of the filter circuitry. The impedance matching network also has a differential output coupled to a signal processing circuitry. The signal processing circuitry has an input impedance. The impedance matching network matches the input impedance of the signal processing circuitry to the output impedance of the filter circuitry.

公开(公告)号：US07031683B2

公开(公告)日：2006-04-18

申请号：US10083633

申请日：2002-02-26

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

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

IPC: H04B1/26

CPC classification number: H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

Abstract: A calibration circuitry includes an adjustable capacitor, a voltage generator, a reference voltage generator, and a controller. The reference voltage generator provides a reference voltage. The voltage generator provides a measurement voltage that depends on the capacitance of the adjustable capacitor. The capacitance of the adjustable capacitor varies in response to a control signal. The controller provides the control signal based on the relative values of the reference voltage and the measurement voltage.

公开(公告)号：US06970717B2

公开(公告)日：2005-11-29

申请号：US10075122

申请日：2002-02-12

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

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

IPC: H04B1/28 ,  H04B1/40 ,  H04B15/02 ,  H04B15/04 ,  H04M1/00

CPC classification number: H04B1/28 ,  H04B1/0003 ,  H04B1/38 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

Abstract: 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.

Abstract translation: 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：US06804497B2

公开(公告)日：2004-10-12

申请号：US09821342

申请日：2001-03-29

Applicant: Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu Shankar Srinivasan

Inventor： Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu Shankar Srinivasan

IPC: H04B140

CPC classification number: H04B1/109 ,  H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064 ,  H04L27/2649

Abstract: Radio-frequency (RF) apparatus includes receiver analog circuitry that receives an RF signal and provides at least one digital signal to receiver digital circuitry that functions in cooperation with the receiver analog circuitry. The receiver analog circuitry and the receiver digital circuitry are partitioned so that interference effects between the receiver analog circuitry and the receiver digital circuitry tend to be reduced.

Abstract translation: 射频（RF）设备包括接收模拟电路，其接收RF信号并且向与接收机模拟电路协作起作用的接收机数字电路提供至少一个数字信号。 接收机模拟电路和接收机数字电路被分割，使得接收机模拟电路和接收机数字电路之间的干扰效应趋向于减小。

公开(公告)号：US06078444A

公开(公告)日：2000-06-20

申请号：US634161

申请日：1996-04-18

Applicant: G. Diwakar Vishakhadatta ,  David E. Reed ,  Jerrell P. Hein ,  G. Tyson Tuttle

Inventor： G. Diwakar Vishakhadatta ,  David E. Reed ,  Jerrell P. Hein ,  G. Tyson Tuttle

IPC: G11B5/012 ,  G11B5/09 ,  G11B5/55 ,  G11B5/58 ,  G11B5/596 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B5/00 ,  H03M1/12

CPC classification number: G11B5/012 ,  G11B19/28 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/1403 ,  G11B5/09 ,  G11B5/5526 ,  G11B5/553 ,  G11B5/5547 ,  G11B5/58 ,  G11B5/59605 ,  G11B5/59622 ,  G11B5/59633 ,  G11B5/59688 ,  G11B20/1258 ,  G11B5/5534 ,  G11B5/5965

Abstract: A circuit is provided for use with analog to digital conversion techniques in sampled amplitude read channel integrated circuits. A common ADC may be utilized for conversion of both high frequency disk data such as user data and servo data, for example, and for low frequency auxiliary data such as, for example, motor back-EMF current signals. The ADC may utilize the relatively low bit accuracy required for the read channel disk data and through oversampling techniques obtain sufficient conversion accuracy to meet the relatively higher precision requirements for the auxiliary data conversion. The auxiliary data is modified by a ramp signal and the ADC is run on a clock generated from a dithered frequency source so that ADC quantization errors may be randomized.

Abstract translation: 在采样幅度读通道集成电路中提供用于模数转换技术的电路。 例如，可以使用公共ADC来转换诸如用户数据和伺服数据的高频盘数据，以及用于低频辅助数据，例如电动机反电动势电流信号。 ADC可以利用读通道盘数据所需的相对较低的位精度，并且通过过采样技术获得足够的转换精度以满足对辅助数据转换的相对较高的精度要求。 辅助数据由斜坡信号修改，ADC在从抖动频率源产生的时钟上运行，因此ADC量化误差可以随机化。