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1. 发明授权

US5877720A Reconfigurable analog-to-digital converter 失效
标题翻译：可重配置的模数转换器
公开(公告)号：US5877720A
公开(公告)日：1999-03-02
申请号：US866194
申请日：1997-05-30
申请人： Palaksha Setty , Jeff Sonntag
发明人： Palaksha Setty , Jeff Sonntag
IPC分类号： H03M1/00 , H03M1/36 , H03M1/10
CPC分类号： H03M1/007 , H03M1/206 , H03M1/365
摘要： A reconfigurable analog-to-digital (A/D) converter that produces an N bit output in a first operating mode and an (N+1) bit output in a second operating mode. The reconfigurable A/D converter is especially well-suited for use in a read channel device.
摘要翻译：一种可重新配置的模拟（A / D）转换器，其在第一操作模式中产生N位输出，并且在第二操作模式中产生（N + 1）位输出。可重构A / D转换器特别适用于读通道器件。

2. 发明授权

US6091300A Method and apparatus for adjusting the input common mode voltage of a differential amplifier 失效
标题翻译：用于调节差分放大器的输入共模电压的方法和装置
公开(公告)号：US6091300A
公开(公告)日：2000-07-18
申请号：US954705
申请日：1997-10-20
申请人： Palaksha Setty , Krishnaswamy Nagaraj
发明人： Palaksha Setty , Krishnaswamy Nagaraj
IPC分类号： H03F1/02 , H03F3/45 , H03F3/04
CPC分类号： H03F1/0244 , H03F3/45188 , H03F3/45753 , H03F3/45977 , H03F2203/45658
摘要： A method and apparatus for adjusting the output common-mode of a differential amplifier is disclosed. This is accomplished by reducing the supply voltage to the differential amplifier during the auto-zero mode and returning the supply voltage to the original level during the amplification mode.
摘要翻译：公开了一种用于调整差分放大器的输出共模的方法和装置。这是通过在自动归零模式期间减小差分放大器的电源电压并在放大模式期间将电源电压恢复到原始电平来实现的。

3. 发明授权

US06504397B1 Output controlled line driver with programmable common mode control 有权
标题翻译：输出控制线驱动器，具有可编程共模控制
公开(公告)号：US06504397B1
公开(公告)日：2003-01-07
申请号：US09949260
申请日：2001-09-07
申请人： Siegfried Hart , Palaksha Setty
发明人： Siegfried Hart , Palaksha Setty
IPC分类号： H03K1716
CPC分类号： H04L25/028 , H04L25/0276 , H04L25/0278
摘要： A differential line driver having integrated output termination resistors is disclosed. The termination resistors are a combination of a controlled transistor and a low precision resistor. The transistor calibrates-out the imprecision of the resistor based on a precise electrical reference. In a preferred embodiment the transistor is a CMOS transistor and the resistor is a CMOS resistor. The combination of a CMOS transistor and CMOS resistor features higher linearity and precision than a CMOS transistor alone due to the smaller effective drain-source voltage across the CMOS transistor. Moreover, the present invention discloses independent programmability of the integrated output termination resistor, the output common mode voltage, and the output amplitude. The value of the output termination resistor(s), the value of the output common mode voltage, and the value of the output amplitude are controlled independently and are continuously maintained with respect to a precise electrical reference. As a result, the value of the output termination resistance, the value of the output common mode voltage, and the value of the output amplitude are insensitive to manufacturing process tolerances and variations in temperature and supply voltage.
摘要翻译：公开了一种具有集成输出终端电阻器的差分线路驱动器。终端电阻是受控晶体管和低精度电阻的组合。晶体管校准基于精确电参考的电阻器的不精确性。在优选实施例中，晶体管是CMOS晶体管，并且电阻器是CMOS电阻器。 CMOS晶体管和CMOS电阻的组合由于CMOS晶体管两端的有效漏极 - 源极电压较小而具有比单独的CMOS晶体管更高的线性度和精度。此外，本发明公开了集成输出终端电阻器的独立可编程性，输出共模电压和输出幅度。输出终端电阻的值，输出共模电压的值和输出幅度的值被独立地控制，并且相对于精确的电参考被连续地保持。结果，输出终端电阻的值，输出共模电压的值和输出幅度的值对制造工艺公差和温度和电源电压的变化不敏感。

4. 发明授权

US5586306A Integrated circuit servo system control for computer mass storage device with distributed control functionality to reduce transport delay 失效
标题翻译：用于具有分布式控制功能的计算机大容量存储设备的集成电路伺服系统控制，以减少传输
公开(公告)号：US5586306A
公开(公告)日：1996-12-17
申请号：US448098
申请日：1995-05-23
申请人： Paul M. Romano , Larry D. King , John S. Geldman , Bhupendra K. Ahuja , Palaksha Setty , Petro Estakhri , Son Ho , Phuc Tran , Maryam Imam
发明人： Paul M. Romano , Larry D. King , John S. Geldman , Bhupendra K. Ahuja , Palaksha Setty , Petro Estakhri , Son Ho , Phuc Tran , Maryam Imam
IPC分类号： G11B5/55 , G11B5/596 , G11B19/02 , G11B19/12 , G11B19/20 , G11B19/28 , G11B20/10 , G11B21/08 , G11B21/10 , G11B27/30 , G11B33/10 , G06F3/00
CPC分类号： G11B27/3027 , G11B19/02 , G11B19/12 , G11B19/20 , G11B19/28 , G11B20/10 , G11B21/083 , G11B21/106 , G11B5/5526 , G11B5/59605 , G11B5/59655 , G11B33/10
摘要： An integrated circuit controls the low level, electromechanical functionality of a computer mass storage device, such as a magnetic disk drive incorporating a spindle motor for rotatably controlling a disk and an actuator for positioning at least one read/write head with respect to the disk, to read or write encoded data configured in information data sectors and to sense encoded data of servo data sectors. A servo subsystem is coupled to an output of the read/write head for detecting the servo data sectors and providing a control signal in response thereto. An analog-to-digital subsystem is also coupled to an output of the read/write head and is operative in response to the servo subsystem control signal for converting the encoded data of the servo data sectors to digital transducer position information representative of a position of the read/write head with respect to the data tracks. A data processing subsystem is coupled to the analog-to-digital subsystem for processing the digital transducer position information and providing digital motion control signals in response thereto. A digital-to-analog subsystem is coupled to the data processing subsystem for providing analog control signals to the spindle motor and the actuator in response to the digital motion control signals.
摘要翻译：集成电路控制计算机大容量存储装置的低级机电功能，例如包括用于可旋转地控制盘的主轴电机的磁盘驱动器和用于相对于盘定位至少一个读/写头的致动器，读取或写入配置在信息数据扇区中的编码数据，并读取伺服数据扇区的编码数据。伺服子系统耦合到读/写头的输出端，用于检测伺服数据扇区并提供响应于此的控制信号。模拟数字子系统还耦合到读/写头的输出端，并响应于伺服子系统控制信号操作，用于将伺服数据扇区的编码数据转换为数字换能器位置信息，该位置信息表示相对于数据轨道的读/写头。数据处理子系统耦合到模数 - 数字子系统，用于处理数字换能器位置信息并响应于此提供数字运动控制信号。数字到模拟子系统耦合到数据处理子系统，用于响应于数字运动控制信号向主轴电动机和致动器提供模拟控制信号。

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