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1. 发明授权

US06882487B2 Compensation for timing variation in disc drives employing servo tracking systems 失效
标题翻译：使用伺服跟踪系统的磁盘驱动器的定时变化补偿
公开(公告)号：US06882487B2
公开(公告)日：2005-04-19
申请号：US10183680
申请日：2002-06-27
申请人： Reed D. Hanson , Timothy F. Ellis , Dustin M. Cvancara , Nathaniel B. Wilson
发明人： Reed D. Hanson , Timothy F. Ellis , Dustin M. Cvancara , Nathaniel B. Wilson
IPC分类号： G11B5/55 , G11B5/596 , G11B27/30 , G11B19/247
CPC分类号： G11B5/5534 , G11B5/59627
摘要： An apparatus and method for compensating for variation in sample rate in a disc drive having a rotating disc and a head that is positioned over the rotating disc is provided. The disc includes at least one track that has multiple consecutive sectors. A sample rate value between timing marks of each pair of consecutive sectors of the multiple consecutive sectors is computed to obtain a sequence of sample rate values. A sequence of timing error values is computed as a function of the sequence of sample rate values and a nominal sample rate value. Data related to the sequence of timing error values is utilized to compensate for variation in sample rate values.
摘要翻译：提供了一种用于补偿具有旋转盘和位于旋转盘上的头的盘驱动器中的采样率变化的装置和方法。盘包括具有多个连续扇区的至少一个轨道。计算多个连续扇区的每对连续扇区的定时标记之间的采样率值，以获得采样率值序列。根据采样率值和标称采样率值的顺序计算定时误差值序列。利用与定时误差值序列有关的数据来补偿采样率值的变化。

2. 发明授权

US06285522B1 Rotational vibration compensation using a dedicated surface with a constant frequency pattern 失效
标题翻译：使用具有恒定频率图案的专用表面进行旋转振动补偿
公开(公告)号：US06285522B1
公开(公告)日：2001-09-04
申请号：US09215470
申请日：1998-12-18
申请人： Lealon R. McKenzie , D. Brent Douglas , Nathaniel B. Wilson , Stuart K. Francis
发明人： Lealon R. McKenzie , D. Brent Douglas , Nathaniel B. Wilson , Stuart K. Francis
IPC分类号： G11B5596
CPC分类号： G11B5/59627 , G11B5/5582 , G11B33/08
摘要： An apparatus and method for minimizing the effects of rotational vibration upon a disc drive having first and second heads supported adjacent first and second disc recording surfaces, respectively. A frequency modulation (FM) demodulator generates a rotational velocity signal indicative of application of rotational vibration to the base deck in relation to changes in frequency of a readback signal generated from a circumferentially extending frequency pattern written to the first disc recording surface at a constant frequency. A servo circuit controllably positions the first and second heads in response to servo information stored on the second disc recording surface and the rotational velocity signal from the FM demodulator. The servo circuit further interrupts a data transfer operation between the second disc recording surface and a host device when a magnitude of the rotational velocity signal exceeds a predetermined threshold.
摘要翻译：一种用于最小化旋转振动对具有分别支撑在第一和第二盘记录表面附近的第一和第二磁头的磁盘驱动器的影响的装置和方法。频率调制（FM）解调器产生一个旋转速度信号，该旋转速度信号表示相对于以恒定频率写入到第一盘记录表面的周向延伸的频率图案产生的回读信号的频率变化，向基座提供旋转振动。伺服电路响应于存储在第二盘记录表面上的伺服信息和来自FM解调器的旋转速度信号可控地定位第一和第二磁头。当旋转速度信号的大小超过预定阈值时，伺服电路进一步中断第二盘记录表面和主机设备之间的数据传送操作。

3. 发明授权

US07119981B2 Method and apparatus for tracking radially-dependent repeatable run-out 有权
公开(公告)号：US07119981B2
公开(公告)日：2006-10-10
申请号：US10184702
申请日：2002-06-28
申请人： Reed D. Hanson , Nathaniel B. Wilson , John C. Morris , Timothy F. Ellis
发明人： Reed D. Hanson , Nathaniel B. Wilson , John C. Morris , Timothy F. Ellis
IPC分类号： G11B5/596 , G11B5/55
CPC分类号： G11B5/5534 , G11B5/59627
摘要： An apparatus and method for tracking radially-dependent repeatable run-out in a disc drive having a servo loop for positioning a head over a rotating disc is provided. The disc includes multiple tracks. Radially-dependent repeatable run-out control components for at least a subset of the multiple tracks are first determined. Data representative of the radially-dependent repeatable run-out control components for the subset of the multiple tracks is then stored. The stored data representative of the radially-dependent repeatable run-out control components is retrieved before settling on the target track, and subsequently used to follow the selected track.

4. 发明授权

US06304406B1 Rotational vibration compensation using a fixed head and a constant frequency pattern 失效
标题翻译：使用固定头和恒定频率模式进行旋转振动补偿
公开(公告)号：US06304406B1
公开(公告)日：2001-10-16
申请号：US09216326
申请日：1998-12-18
申请人： D Brent Douglas , Lealon R. McKenzie , Nathaniel B. Wilson , Stuart K. Francis , Arthur J. Clark
发明人： D Brent Douglas , Lealon R. McKenzie , Nathaniel B. Wilson , Stuart K. Francis , Arthur J. Clark
IPC分类号： G11B1546
CPC分类号： G11B25/043 , G11B5/5582 , G11B5/59627 , G11B33/08
摘要： An apparatus and method for minimizing the effects of rotational vibration upon a disc drive having a base deck supporting a rotatable disc and an actuator having a moveable data head. A fixed head is supported over the disc at a predetermined radius and transduces a circumferentially extending frequency pattern written to the disc at a constant frequency to generate a readback signal. A frequency modulation (FM) demodulator generates a rotational velocity signal indicative of application of rotational vibration to the base deck in relation to changes in frequency of the readback signal. A servo circuit controllably positions the moveable data head in response to the rotational velocity signal and servo information readback by the moveable data head. The servo circuit interrupts a data transfer operation between the moveable data head and a host device when a magnitude of the rotational velocity signal exceeds a predetermined threshold. The circumferentially extending frequency pattern is preferably used to clock the writing of the servo information during disc drive manufacturing.
摘要翻译：一种用于最小化旋转振动对具有支撑可旋转盘的基座和具有可移动数据头的致动器的盘驱动器的影响的装置和方法。固定头以预定的半径被支撑在盘上，并且以恒定频率转换写入到盘的周向延伸的频率图案以产生回读信号。频率调制（FM）解调器相对于回读信号的频率变化产生指示向基座施加旋转振动的旋转速度信号。伺服电路响应于可移动数据头的旋转速度信号和伺服信息回读而可控地定位可移动数据头。当旋转速度信号的大小超过预定阈值时，伺服电路中断可移动数据头与主机之间的数据传送操作。圆周延伸的频率图案优选地用于在盘驱动器制造期间对伺服信息的写入进行时钟。

5. 发明授权

US6081724A Portable communication device and accessory system 失效
标题翻译：便携式通讯装置及附件系统
公开(公告)号：US6081724A
公开(公告)日：2000-06-27
申请号：US593305
申请日：1996-01-31
申请人： Nathaniel B. Wilson
发明人： Nathaniel B. Wilson
IPC分类号： H04M1/27 , H04M1/60 , H04Q7/32
CPC分类号： H04M1/6075 , H04M1/6041 , H04M1/271
摘要： A portable communications device and accessory system which enables both voice and control commands to be communicated between a portable communication device and external accessories over a single flexible digital interface. When the portable communication device is interfaced to external accessories, such as a power booster and hands-free kit, a microprocessor configures the serial communications bus to pass both the digital voice data and digital control commands to and from the external power booster and the hands-free kit. The external hands-free kit contains its own auxiliary CODEC for encoding analog voice signals and decoding the digital voice data. When the portable communication device is not interfaced with external accessories, the microprocessor configures the serial communication bus to pass the digital voice data to and from an internal CODEC for use with the portable device's own microphone and speaker.
摘要翻译：便携式通信设备和附件系统，其能够通过单个灵活数字接口在便携式通信设备和外部附件之间传送语音和控制命令。当便携式通信设备与诸如增压器和免提套件的外部附件接口时，微处理器将串行通信总线配置成将数字语音数据和数字控制命令传送到外部增强器和手上 - 免费套件外部免提套件包含自己的辅助CODEC，用于编码模拟语音信号和解码数字语音数据。当便携式通信设备未与外部附件接口时，微处理器配置串行通信总线，以将数字语音数据传送到内部CODEC以及从便携式设备自己的麦克风和扬声器使用。

6. 发明授权

US5627857A Linearized digital automatic gain control 失效
标题翻译：线性化数字自动增益控制
公开(公告)号：US5627857A
公开(公告)日：1997-05-06
申请号：US528969
申请日：1995-09-15
申请人： Nathaniel B. Wilson
发明人： Nathaniel B. Wilson
IPC分类号： H03G3/20 , H03F1/32 , H03G3/30 , H04B1/38 , H04L5/16
CPC分类号： H03G3/3042 , H03F1/3241 , H03F2200/294 , H03F2200/372
摘要： The present invention provides linear, digital automatic gain control (AGC) in a radio. A received signal is demodulated to provide I and Q digital baseband signals. A received signal strength indication is determined from these signals and the resulting digital signal is adjusted to provide a logarithmic response. This signal is then integrated to provide a digital receive AGC adjust signal. For the transmit AGC adjust, the digital receive AGC adjust signal is filtered and then summed with a scaled closed loop power control command. The closed loop power control commands are ignored if they would result in increasing the transmit gain beyond the amplifier's designed maximum output. The result of the sum operation converted from digital to analog for adjusting the amplifier. The outputs of the transmit and receive AGC amplifiers are linearized by transmit and receive linearizers, respectively, which pre-distort the digital AGC adjust signals prior to digital to analog conversion.
摘要翻译：本发明在无线电装置中提供线性，数字自动增益控制（AGC）。接收信号被解调以提供I和Q数字基带信号。从这些信号确定接收到的信号强度指示，并且调整所得数字信号以提供对数响应。然后，该信号被积分以提供数字接收AGC调整信号。对于发射AGC调整，数字接收AGC调整信号被滤波，然后用缩放闭环功率控制命令相加。如果闭环功率控制命令会导致发射增益超过放大器设计的最大输出，则忽略闭环功率控制命令。并行运算从数字转换为模拟的结果，用于调节放大器。发射和接收AGC放大器的输出分别由发射和接收线性化电路线性化，这些线性化器在数模转换之前对数字AGC调节信号进行预失真。

7. 发明授权

US5617060A Method and apparatus for automatic gain control and DC offset cancellation in quadrature receiver 失效
标题翻译：正交接收机中自动增益控制和直流偏移消除的方法和装置
公开(公告)号：US5617060A
公开(公告)日：1997-04-01
申请号：US423332
申请日：1995-04-13
申请人： Nathaniel B. Wilson , Peter J. Black , Paul E. Peterzell
发明人： Nathaniel B. Wilson , Peter J. Black , Paul E. Peterzell
IPC分类号： H03G3/20 , H03D3/00 , H03D3/24 , H03D7/16 , H03G3/30 , H04B1/30 , H04L27/14 , H04L27/22
CPC分类号： H03D7/165 , H03D3/002 , H03D3/008 , H03G3/3052 , H03G3/3089 , H03D2200/0025 , H03D2200/0047 , H03D2200/005 , H03D2200/0052
摘要： An automatic gain control (AGC) and D.C. offset correction method and apparatus for controlling signal power of a received RF signal within a dual mode quadrature receiver is disclosed herein. In a preferred implementation the automatic gain control apparatus may be adjusted to provide a desired control response to various fading characteristics of a received FM, FSK, GMSK, QPSK, or BPSK signal. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. A quadrature downconverter coupled to the output port serves to translate the frequency of the output signal to a baseband frequency, thereby producing baseband signals. In a preferred implementation the downconverter is operative to map the carrier frequency of the output signal to a baseband frequency offset by a predetermined margin from D.C. Two high gain active lowpass filters provide out-of-band signal rejection for the baseband signals. A D.C. feedthrough suppression loop, disposed to receive said baseband signal, suppresses D.C. offsets produced by the downconverter and lowpass filters, hence providing a compensated baseband signal. The AGC apparatus is further disposed to generate a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and produces the gain control signal by integrating or by refraining from integration based on values of the reference, received power signal, and gain control signals, thereby extending the usable dynamic range of the receiver for FM mode.
摘要翻译：本文公开了一种用于控制双模正交接收机内的接收RF信号的信号功率的自动增益控制（AGC）和直流偏移校正方法和装置。在优选实施例中，可以调整自动增益控制装置以对接收的FM，FSK，GMSK，QPSK或BPSK信号的各种衰落特性提供期望的控制响应。 AGC装置包括具有用于接收输入信号的输入端口的可调节增益放大器，用于接收增益控制信号的控制端口和用于提供输出信号的输出端口。耦合到输出端口的正交下变频器用于将输出信号的频率转换为基带频率，从而产生基带信号。在优选实施例中，下变频器可操作以将输出信号的载波频率从基准频率偏移映射到来自直流的预定余量。两个高增益有源低通滤波器为基带信号提供带外信号抑制。布置成接收所述基带信号的直流抑制回路抑制由下变频器和低通滤波器产生的直流偏移，从而提供经补偿的基带信号。 AGC设备还被设置为基于输出信号的功率产生接收功率信号。饱和积分器将接收到的功率信号与参考信号进行比较，并且通过基于参考值，接收功率信号和增益控制信号的值积分或避免积分来产生增益控制信号，从而延长接收机的可用动态范围用于FM模式。

8. 发明授权

US5469115A Method and apparatus for automatic gain control in a digital receiver 失效
标题翻译：数字接收机中自动增益控制的方法和装置
公开(公告)号：US5469115A
公开(公告)日：1995-11-21
申请号：US235811
申请日：1994-04-28
申请人： Paul E. Peterzell , Nathaniel B. Wilson , Peter J. Black
发明人： Paul E. Peterzell , Nathaniel B. Wilson , Peter J. Black
IPC分类号： H03G3/20 , H03G3/30 , H04B1/16 , H04B1/18 , H04L27/22 , H04L27/38
CPC分类号： H03G3/3078 , H03G3/3089
摘要： An automatic gain control (AGC) apparatus for a digital receiver is disclosed herein. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. The AGC apparatus further includes a measurement circuit for generating a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and generates an gain control signal in response to a result of the comparison. The saturating integrator includes a decision circuit for enabling integration based on values of the received power signal, the reference signal, and the gain control signal. In a preferred implementation the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input signal dynamic range. Accordingly, the AGC apparatus is capable of being used in digital demodulation of FM signals. The AGC apparatus may also be employed within a dual mode receiver designed to process both FM and code division multiple access (CDMA) input signals.
摘要翻译：本文公开了一种用于数字接收机的自动增益控制（AGC）装置。 AGC装置包括具有用于接收输入信号的输入端口的可调节增益放大器，用于接收增益控制信号的控制端口和用于提供输出信号的输出端口。 AGC装置还包括用于基于输出信号的功率产生接收功率信号的测量电路。饱和积分器将接收到的功率信号与参考信号进行比较，并且响应于比较的结果而生成增益控制信号。饱和积分器包括基于接收功率信号，参考信号和增益控制信号的值来实现集成的判定电路。在优选实施例中，输入限幅器与模数转换器结合使用能够调节增加的输入信号动态范围。因此，AGC装置能够用于FM信号的数字解调。 AGC设备还可以被用于设计成处理FM和码分多址（CDMA）输入信号的双模式接收机。

9. 发明授权

US5452473A Reverse link, transmit power correction and limitation in a radiotelephone system 失效
标题翻译：无线电话系统中的反向链路，发射功率校正和限制
公开(公告)号：US5452473A
公开(公告)日：1995-09-19
申请号：US203151
申请日：1994-02-28
申请人： Ana L. Weiland , Richard K. Kornfeld , Richard J. Kerr , John E. Maloney , Nathaniel B. Wilson
发明人： Ana L. Weiland , Richard K. Kornfeld , Richard J. Kerr , John E. Maloney , Nathaniel B. Wilson
IPC分类号： H04B1/40 , H04B1/04 , H04B7/005 , H04B7/26 , H04W52/06 , H04W52/52 , H04B1/06
CPC分类号： H04W52/06 , H04W52/36 , H04W52/52
摘要： The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.
摘要翻译：本发明的方法和装置限制在优选实施例中在蜂窝系统中操作的无线电话机的输出功率。这确保传输的边带和合成器相位噪声保持在一定的规格内。这通过功率检测和校正累加器来实现，即使当与无线电话机通信的小区站点向无线电话机发送功率开启命令时，通过将增益调整限制为最大值来一起生成增益控制信号。该过程包括由于发射机级或增益控制元件中的增益变化而动态校正发射机的输出电平。

10. 发明授权

US5757858A Dual-mode digital FM communication system 失效
标题翻译：双模数字FM通信系统
公开(公告)号：US5757858A
公开(公告)日：1998-05-26
申请号：US779601
申请日：1997-01-07
申请人： Peter J. Black , Nathaniel B. Wilson
发明人： Peter J. Black , Nathaniel B. Wilson
IPC分类号： H04L27/10 , H04B1/04 , H04B1/40 , H04B7/26 , H04L25/49 , H04L27/14 , H04L27/233 , H04W4/18 , H04W88/06 , H04B1/16 , H04J13/02
CPC分类号： H04B1/406 , H04L25/4904 , H04L27/142 , H04L27/2337 , H04B2201/70707 , H04W4/18 , H04W88/06
摘要： A dual-mode digital communication system for communicating an information signal during operation in frequency-modulated (FM) and multiple-access modes is disclosed herein. The digital communication system includes a dual-mode transmitter for transmitting the information signal using an FM communication signal during FM mode operation, and for transmitting the information signal using a multiple-access communication signal during multiple-access mode operation. The communication system further includes a dual-mode receiver for receiving the FM communication signal during FM mode operation, and for receiving the multiple-access communication signal during multiple-access mode operation. Incorporated within the dual-mode receiver is a digital demodulator for recovering the information signal from the received FM signal during operation in the FM mode, and for recovering the information signal from the received multiple-access signal during multiple-access mode operation. In a preferred implementation the dual-mode transmitter is disposed to convert a first sequence of binary data within the information signal into a sampled modulation waveform, and to provide the FM communication signal by modulating a carrier signal based at least in part on the sampled modulation waveform. The dual-mode transmitter may also be configured to multiplex a second sequence of wideband message data with the sampled modulation waveform so as to form a composite FM modulation waveform.
摘要翻译：这里公开了一种用于在频率调制（FM）和多接入模式中的操作期间传送信息信号的双模式数字通信系统。数字通信系统包括一个双模发射机，用于在FM模式操作期间使用FM通信信号发送信息信号，并且在多址模式操作期间使用多址通信信号发送信息信号。通信系统还包括一个双模式接收器，用于在FM模式操作期间接收FM通信信号，并且用于在多址模式操作期间接收多址通信信号。在双模式接收机内并入的是数字解调器，用于在FM模式下操作期间从接收到的FM信号中恢复信息信号，并且用于在多址模式操作期间从所接收的多址信号中恢复信息信号。在优选实施例中，双模式发射器被设置成将信息信号内的二进制数据的第一序列转换成采样的调制波形，并且至少部分地基于采样的调制来调制载波信号来提供FM通信信号波形双模发射机还可以被配置为将第二序列宽带消息数据与采样的调制波形进行复用，以形成复合FM调制波形。

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