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61. 发明授权

US06351339B1 Multi-dimensionally oriented magnetic field information storage system 失效
标题翻译：多维磁场信息存储系统
公开(公告)号：US06351339B1
公开(公告)日：2002-02-26
申请号：US09075856
申请日：1998-05-11
申请人： Ronny Bar-Gadda
发明人： Ronny Bar-Gadda
IPC分类号： G11B502
CPC分类号： B82Y10/00 , G11B5/00 , G11B5/012 , G11B5/09 , G11B5/488 , G11B5/74 , G11B5/743 , G11B5/82 , G11B11/10502 , G11B11/10582 , G11B2005/0026
摘要： A disk medium includes a substrate and a designed topography of individually magnetizable features formed on the surface of the substrate. At least a portion of the disk topography is formed from an etched layer of magnetizable material deposited on the surface of the substrate. An information storing and retrieving system records information on the disk medium magnetically and reads the recorded information optically or magnetically. The information stored in the disk is of the form of bits each represented by a magnetic field established in the features. The direction of the magnetic field can be in a direction other than the bitstream direction, with the magnetic storing and retrieving system having a pair of non-parallel heads adapted to recognize this direction as representative of discrete logic levels formulating the basis of a non-binary storage system having significantly increased storage density.
摘要翻译：磁盘介质包括基板和形成在基板的表面上的单独可磁化特征的设计形状。磁盘形貌的至少一部分由沉积在基板的表面上的可磁化材料的蚀刻层形成。信息存储和检索系统以磁性方式记录磁盘介质上的信息，并以光学或磁性方式读取所记录的信息。存储在盘中的信息是以由特征中建立的磁场表示的位的形式。磁场的方向可以在比比特流方向以外的方向上，磁存储和检索系统具有一对不平行的头部，其适合于将该方向识别为表示离散逻辑电平的表示，二进制存储系统具有显着增加的存储密度。

62. 发明授权

US06341046B1 Current biasing voltage sensing preamplifier for magnetoresistive heads 失效
标题翻译：用于磁阻头的电流偏置电压感测前置放大器
公开(公告)号：US06341046B1
公开(公告)日：2002-01-22
申请号：US08422440
申请日：1995-04-14
申请人： Douglas R. Peterson
发明人： Douglas R. Peterson
IPC分类号： G11B502
CPC分类号： G11B5/02 , G11B5/012 , G11B5/09 , H03F1/302
摘要： A preamplifier for an MR element having first and second ends includes first and second feedback loops controlling the biasing of the MR element. The first feedback loop responds to a center voltage of the MR element to control a current source coupled to the first end of the MR element, and the second feedback loop responds to an output voltage across the MR element to control a current sink coupled to the second end of the MR element. In one embodiment, the preamplifier includes a multiplexer coupled between first and second MR elements and the first and second feedback loops. The multiplexer electrically isolates the first and second MR elements to improve common-mode rejection and feedback performance of the preamplifier.
摘要翻译：用于具有第一和第二端的MR元件的前置放大器包括控制MR元件的偏置的第一和第二反馈回路。第一反馈环路响应于MR元件的中心电压以控制耦合到MR元件的第一端的电流源，并且第二反馈环路响应于MR元件两端的输出电压来控制耦合到MR元件的电流宿 MR元素的第二端。在一个实施例中，前置放大器包括耦合在第一和第二MR元件与第一和第二反馈回路之间的多路复用器。多路复用器电隔离第一和第二MR元件以改善前置放大器的共模抑制和反馈性能。

63. 发明授权

US06304396B1 Arrangement for reading information from a magnetic record carrier 失效
标题翻译：从磁记录载体读取信息的安排
公开(公告)号：US06304396B1
公开(公告)日：2001-10-16
申请号：US09241013
申请日：1999-02-01
申请人： Joao N. V. L. Ramalho , Johannes O. Voorman , Patrick Leclerc , Jozef A. M. Ramaekers , Marcel L Lugthart , Johannes W.M. Bergmans
发明人： Joao N. V. L. Ramalho , Johannes O. Voorman , Patrick Leclerc , Jozef A. M. Ramaekers , Marcel L Lugthart , Johannes W.M. Bergmans
IPC分类号： G11B502
CPC分类号： G11B20/10009 , G01R33/09 , G11B5/012 , G11B5/02 , G11B5/09 , G11B7/00 , G11B20/22 , G11B33/14 , G11B2005/0016 , G11B2005/0018
摘要： An arrangement is disclosed for reading information from a record carrier. The arrangement comprises a read head having at least one magneto-resistive element (Rmr), a first transistor (Tr1) and a second transistor (Tr2). The base of the first transistor (Tr1) is coupled to the emitter of the second transistor (Tr2) via a first capacitor (6). The base of the second transistor (Tr2) is coupled to the emitter of the first transistor (Tr1) via a second capacitor (8). The arrangement further comprises a non-linear transconductance amplifier (14) having first and second inputs coupled to the output terminals (10,12) of the arrangement, and having and inverting and non-inverting outputs coupled to the bases of the first and second transistor. The non-linear transconductance amplifier (14) is adapted to supply a control current at its inverting and non-inverting outputs in response to a voltage present across its inputs, such that for first and second input voltages resulting in first and second output currents, respectively, the first input voltage being larger than the second input voltage, the amplification factor of the transconductance means being larger for generating the first output current than for generating the second output current.
摘要翻译：公开了一种用于从记录载体读取信息的装置。该装置包括具有至少一个磁阻元件（Rmr），第一晶体管（Tr1）和第二晶体管（Tr2）的读取头。第一晶体管（Tr1）的基极经由第一电容器（6）耦合到第二晶体管（Tr2）的发射极。第二晶体管（Tr2）的基极通过第二电容器（8）耦合到第一晶体管（Tr1）的发射极。该装置还包括具有耦合到该装置的输出端子（10,12）的第一和第二输入的非线性跨导放大器（14），并且具有耦合到第一和第二输入端的基极的反相和非反相输出晶体管。非线性跨导放大器（14）适于响应于跨过其输入端的电压而在其反相和非反相输出端提供控制电流，使得对于产生第一和第二输出电流的第一和第二输入电压，分别地，第一输入电压大于第二输入电压，跨导装置的放大系数比用于产生第二输出电流的产生第一输出电流大。

64. 发明授权

US06297921B1 Write driver circuit having programmable overshoot and undershoot 有权
标题翻译：写入具有可编程过冲和下冲的驱动电路
公开(公告)号：US06297921B1
公开(公告)日：2001-10-02
申请号：US09292502
申请日：1999-04-15
申请人： John J. Price, Jr. , Donald J. Schulte
发明人： John J. Price, Jr. , Donald J. Schulte
IPC分类号： G11B502
CPC分类号： G11B5/022 , G11B5/012 , G11B5/02 , G11B5/035 , G11B5/09 , G11B2005/0013
摘要： Undershoot and overshoot control circuitry is provided in a write driver circuit to enhance its efficiency and ability to quickly change directions of write current through a write head. The undershoot and overshoot control circuitry includes: (1) an undershoot reduction circuit, which adds current to the write current when one head terminal has a voltage higher than the opposite head terminal and the input signals are in a certain state, indicating that the write current waveform is about to experience some level of undershoot; (2) an overshoot enhancement circuit, which adds current to the write current when one of the head terminals has a voltage lower than a predetermined threshold, indicating that the write current waveform is about to experience some level of overshoot; and (3) an overshoot reduction circuit, which provides a resistance between the head terminals in parallel with the write head to damp overshoot, when one of the head terminals has a voltage lower than a predetermined threshold, indicating that the write current waveform is about to experience some level of overshoot. The predetermined thresholds, the currents added to the write current, and the resistance provided are all programmable in one embodiment, so that the undershoot and overshoot of the write driver circuit may be precisely controlled for efficient operation.
摘要翻译：在写驱动器电路中提供下冲和过冲控制电路，以增强其效率和快速改变通过写头的写入电流方向的能力。下冲和过冲控制电路包括：（1）下冲还原电路，当一个头端子的电压高于相对的头端并且输入信号处于一定状态时，该电路将电流加到写入电流上，电流波形即将经历一定程度的下冲; （2）过冲增强电路，当一个头端子具有低于预定阈值的电压时，将电流加到写入电流，指示写入电流波形即将经历一定程度的过冲; 和（3）过冲减少电路，当头部端子中的一个具有低于预定阈值的电压时，其提供与写入头并联的头部端子之间的电阻以抑制过冲，指示写入电流波形为约经历一定程度的超调。预定阈值，添加到写入电流的电流和提供的电阻在一个实施例中都是可编程的，使得可以精确地控制写入驱动器电路的下冲和过冲以进行有效的操作。

65. 发明授权

US06282044B1 8V ring clamp circuit 有权
标题翻译： 8V环形钳位电路
公开(公告)号：US06282044B1
公开(公告)日：2001-08-28
申请号：US09286187
申请日：1999-04-05
申请人： Patrick M. Teterud , Kenneth J. Maggio
发明人： Patrick M. Teterud , Kenneth J. Maggio
IPC分类号： G11B502
CPC分类号： G11B5/022 , G11B5/012 , G11B5/02 , G11B2005/0013
摘要： A clamp circuit for clamping a terminal of an H-bridge circuit. The clamp circuit is capable of being applied to a voltage in excess of 5V including 8 volts.
摘要翻译：用于钳位H桥电路端子的钳位电路。钳位电路能够施加到超过5V的电压，包括8伏特。

66. 发明授权

US06256161B1 Echo cancellation for disk drive read circuit 有权
标题翻译：磁盘驱动器读取电路的回波消除
公开(公告)号：US06256161B1
公开(公告)日：2001-07-03
申请号：US09385788
申请日：1999-08-30
申请人： John D. Leighton , Sally A. Doherty
发明人： John D. Leighton , Sally A. Doherty
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/02 , G11B23/0007
摘要： Echo cancellation is provided in a disk drive circuit having a transducing head connected to a preamplifier circuit by an electrical interconnect with a first time delay, a first interface between the preamplifier and the electrical interconnect having a first reflection coefficient and a second interface between the transducing head and the electrical interconnect having a second reflection coefficient. The echo cancellation technique delays a preamplifier output signal with a second time delay, the second time delay being double the first time delay. The preamplifier output signal is also filtered so as to simulate the effects of the first and second reflection coefficients. The delayed and filtered signal is then subtracted from the preamplifier output signal, thereby removing echo content from the signal.
摘要翻译：在具有第一时间延迟的电互连连接到前置放大器电路的转换头的磁盘驱动电路中提供回波消除，前置放大器和电互连之间的第一接口具有第一反射系数和第二接口之间的转换头部和电互连具有第二反射系数。回波消除技术延迟具有第二时间延迟的前置放大器输出信号，第二时间延迟是第一时间延迟的两倍。前置放大器输出信号也被滤波，以模拟第一和第二反射系数的影响。然后从前置放大器输出信号中减去延迟和滤波的信号，从而消除信号中的回波内容。

67. 发明授权

US06252736B1 System for preventing crosstalk noise in a disk drive 有权
标题翻译：用于防止磁盘驱动器中的串扰噪声的系统
公开(公告)号：US06252736B1
公开(公告)日：2001-06-26
申请号：US09221642
申请日：1998-12-28
申请人： Rodney A. L. Mattison
发明人： Rodney A. L. Mattison
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B2005/0008 , G11B2005/0013
摘要： A system for preventing crosstalk noise in a head of a drive for a reading data from and writing data to a magnetic media. The present invention includes circuitry that applies an intermediate current to a write element after a write operation is complete. The intermediate current causes the magnetic domains of the write element to go from a high energy state to an intermediate energy state before going to a low energy state. This reduces the magnetic pulses emitted from the write element.
摘要翻译：一种用于防止驱动器头部中的串扰噪声从磁介质读取数据并将数据写入磁介质的系统。本发明包括在写入操作完成之后将中间电流施加到写入元件的电路。中间电流使得写入元件的磁畴在进入低能量状态之前从高能态转变为中等能量状态。这减少了从写入元件发出的磁脉冲。

68. 发明授权

US06243220B1 Apparatus for recording and reproducing an audio mode information signal corresponding to an audio mode of a multi-channel audio signal 失效
标题翻译：用于记录和再现与多声道音频信号的音频模式对应的音频模式信息信号的装置
公开(公告)号：US06243220B1
公开(公告)日：2001-06-05
申请号：US08732681
申请日：1996-10-18
申请人： Akio Aoki , Yukio Kamiya , Osamu Itokawa
发明人： Akio Aoki , Yukio Kamiya , Osamu Itokawa
IPC分类号： G11B502
CPC分类号： G11B15/087 , G11B5/0086 , G11B20/10527 , G11B20/1201 , G11B27/032 , G11B27/036 , G11B27/3063 , G11B2020/10592 , G11B2220/90 , H04N5/78263 , H04N5/928
摘要： In a recording and reproducing apparatus, a plurality of audio signal areas and audio sub-code areas for recording audio mode information of the respective areas are provided on a recording medium in a record mode. The audio mode information corresponding to the audio signal area is detected from the audio signal sub-code in the reproduction mode.
摘要翻译：在记录和再现装置中，用于记录各个区域的音频模式信息的多个音频信号区域和音频子代码区域以记录模式提供在记录介质上。在再现模式中，从音频信号子码检测对应于音频信号区域的音频模式信息。

69. 发明授权

US06204998B1 Multi-tapped coil having tapped segments cascaded for amplification for improving signal-to-noise ratio 失效
标题翻译：具有用于放大级联的抽头段的多抽头线圈以提高信噪比
公开(公告)号：US06204998B1
公开(公告)日：2001-03-20
申请号：US09583104
申请日：1998-03-23
申请人： Eric R. Katz
发明人： Eric R. Katz
IPC分类号： G11B502
CPC分类号： G11B5/313 , G11B5/02 , G11B5/31 , G11B19/02 , G11B23/0007 , G11B2005/0013
摘要： A magnetic head includes an inductive coil electrically partitioned into a plurality of segments by a plurality of conductive leads. During the data reading mode, magnetic flux changes emanating from a record medium are sensed by the magnetic head. The inductive coil transduces the magnetic flux changes into electrical signals at the conductive leads. The signals are amplified by serially cascading the plurality of segments and the signals are then fed into amplifiers. During the data writing mode, the electrical signal is applied to two of the conductive leads via a data writing amplifier. The inductive coil converts the electrical signal into changes in magnetic flux for recording onto a magnetic medium.
摘要翻译：磁头包括通过多个导电引线分隔成多个段的感应线圈。在数据读取模式期间，由磁头检测从记录介质发出的磁通量变化。感应线圈将磁通量变换为导电引线的电信号。信号通过串联级联多个段来放大，然后将信号馈送到放大器中。在数据写入模式期间，电信号通过数据写入放大器施加到两个导电引线。感应线圈将电信号转换成用于记录在磁介质上的磁通量变化。

70. 发明授权

US06201651B1 Circuit for reproducing data and apparatus for reading data out of a magnetic disc based on calculated frequency cut off 有权
标题翻译：基于计算出的频率切断再现用于从磁盘读出数据的数据和装置的电路
公开(公告)号：US06201651B1
公开(公告)日：2001-03-13
申请号：US09227863
申请日：1999-01-11
申请人： Takahiro Korenari
发明人： Takahiro Korenari
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/09 , G11B20/10203 , G11B2005/0016
摘要： An apparatus for reading data out of a magnetic disc includes a circuit for reproducing data, the circuit having a high-pass filter having a cut-off frequency which is a maximum in the range that a solitary reproduced wave is not distorted. The apparatus ensures that a reproduced wave can be obtained without occurrence of reproduction error.
摘要翻译：用于从磁盘读出数据的装置包括用于再现数据的电路，该电路具有在孤立再现波未失真的范围内具有最大值的截止频率的高通滤波器。该装置确保可以在不发生再现错误的情况下获得再现波。

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