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1. 发明授权

US4502021A Constant bandwidth automatic gain control system 失效
标题翻译：恒定带宽自动增益控制系统
公开(公告)号：US4502021A
公开(公告)日：1985-02-26
申请号：US481084
申请日：1983-03-31
申请人： John P. Hill , James J. Touchton
发明人： John P. Hill , James J. Touchton
IPC分类号： G11B5/596 , H03G1/00 , H03G3/30 , H03G3/10
CPC分类号： H03G3/3036 , G11B5/59622 , H03G1/0023
摘要： A constant bandwidth automatic gain control (AGC) system is presented. The system is especially suitable for use in the positioning servo system of a magnetic disk storage system. The system includes a double balanced modulator circuit and a fixed gain video amplifier circuit. The double balanced modulator circuit functions as a variable gain element, and the gain thereof is set by a control voltage derived from an otherwise conventional AGC loop. The gain of the current steering stage of the double balanced modulator is limited to values no greater than 0.5.
摘要翻译：提出了一种恒定带宽自动增益控制（AGC）系统。该系统特别适用于磁盘存储系统的定位伺服系统。该系统包括双平衡调制器电路和固定增益视频放大器电路。双平衡调制器电路用作可变增益元件，并且其增益由通过另一常规AGC环路导出的控制电压来设定。双平衡调制器的电流转向级的增益被限制在不大于0.5的值。

2. 发明授权

US4321517A Resonance suppression method 失效
标题翻译：共振抑制方法
公开(公告)号：US4321517A
公开(公告)日：1982-03-23
申请号：US99988
申请日：1979-12-03
申请人： James J. Touchton , John P. Hill
发明人： James J. Touchton , John P. Hill
IPC分类号： G11B5/55 , G05B5/01
CPC分类号： G11B5/553
摘要： A method of suppressing resonances in electro-mechanical servo systems is disclosed. The servo systems are of the type where first signals indicative of actual position of the servo system are differentiated and second signals indicative of the acceleration of the system are integrated. The differentiated signals are applied to the integrator in order to provide accurate initialization thereof. In modes of operation where the acceleration of the system is substantially zero, the differentiators are not used, thus decoupling the mechanical system from the electronic control system and eliminating resonance from the servo loop. The duty cycle of the differentiators is varied in differing modes of operation of the servo system so as to provide maximum bandwidth and speed to the system coupled with minimum errors in positioning. The system is described in connection with the servoing of magnetic read/write heads radially with respect to rotating magnetic disk data storage media.
摘要翻译：公开了一种抑制机电伺服系统中的共振的方法。伺服系统是类型，其中指示伺服系统的实际位置的第一信号是微分的，并且表示系统的加速度的第二信号被集成。差分信号被施加到积分器，以便提供其准确的初始化。在系统的加速度基本上为零的操作模式中，不使用微分器，从而将机械系统与电子控制系统解耦并消除伺服回路的共振。微分器的占空比在伺服系统的不同操作模式中是变化的，以便为系统提供最大的带宽和速度以及定位中的最小误差。结合磁盘读/写磁头径向相对于旋转磁盘数据存储介质的伺服来描述该系统。

3. 发明授权

US4539608A Low offset position demodular 失效
标题翻译：低偏移位置解调
公开(公告)号：US4539608A
公开(公告)日：1985-09-03
申请号：US447823
申请日：1982-12-08
申请人： John P. Hill , James J. Touchton
发明人： John P. Hill , James J. Touchton
IPC分类号： G11B5/596 , H03D1/22 , H03D1/06 , G11B21/10
CPC分类号： G11B5/59627 , H03D1/229
摘要： A low offset position demodulator that may be used in the positioning servo of a disk drive or similar device. A first stage of the demodulator circuit multiplies or switches a servo carrier signal, modulated with position information, with a synchronized gate signal. This first stage of the demodulator circuit includes a differential output and means for controlling the common mode operating point thereof with an external control voltage. A low pass filter, also having a differential output, is coupled to the differential output of the first stage of the demodulator. A differential-to-single-ended conversion stage is tied to the low pass filter output to provide a single position output signal. Also coupled to the low pass filter differential output is an averaging network that averages the signal appearing on one of the two differential signal lines with the signal appearing on the other differential signal line. The resulting averaged signal is compared to a zero voltage reference signal and the difference between these two signals is then used to derive the control voltage applied to the first stage of the modulator. Hence, the common mode operating point of the balanced demodulator is forced to assume and maintain a zero volt level.
摘要翻译：可用于磁盘驱动器或类似设备的定位伺服中的低偏移位置解调器。解调器电路的第一级用同步的门信号乘以或切换用位置信息调制的伺服载波信号。解调器电路的第一级包括差分输出和用于利用外部控制电压来控制其共模工作点的装置。也具有差分输出的低通滤波器耦合到解调器的第一级的差分输出。差分到单端转换级与低通滤波器输出相连以提供单个位置输出信号。还耦合到低通滤波器差分输出的是平均网络，其平均化出现在两个差分信号线之一上的信号，信号出现在另一个差分信号线上。将所得到的平均信号与零电压参考信号进行比较，然后使用这两个信号之间的差异来推导施加到调制器的第一级的控制电压。因此，平衡解调器的共模工作点被强制为维持零伏电平。

4. 发明授权

US07230981B2 Integrated data jitter generator for the testing of high-speed serial interfaces 有权
标题翻译：集成数据抖动发生器，用于测试高速串行接口
公开(公告)号：US07230981B2
公开(公告)日：2007-06-12
申请号：US10435405
申请日：2003-05-09
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： H04B3/46
CPC分类号： G01R31/31709 , G01R31/31715 , H04L1/205
摘要： An integrated data jitter generator for the testing of high speed serial interfaces is provided. A transmit timing generator for use in a transmit data path includes a high frequency clock generator such as a phase-locked loop or a delay-locked loop having an input for receiving an oscillator or reference clock input. A clock modulator receives both an existing low frequency modulation signal and a high frequency modulation signal. A high-speed modulated clock signal is generated to enable jitter testing by a downstream-coupled receiver. Fixed frequencies such as 3, 6, 125, 150, 250, 300, 750, or 1500 MHz are used for the high-speed modulation signal, but any high-speed modulation frequency can be used to generate the desired amount of jitter. Likewise, the amplitude of the high frequency modulation signal can also be varied as desired.
摘要翻译：提供了一种用于测试高速串行接口的集成数据抖动发生器。用于发送数据路径的发送定时发生器包括诸如锁相环的高频时钟发生器或具有用于接收振荡器或参考时钟输入的输入的延迟锁定环路。时钟调制器接收现有的低频调制信号和高频调制信号。生成高速调制时钟信号，以使下游耦合接收机进行抖动测试。诸如3,6,125,150,250,300,750或1500MHz的固定频率用于高速调制信号，但是可以使用任何高速调制频率来产生期望的抖动量。同样地，高频调制信号的振幅也可以根据需要而改变。

5. 发明授权

US07105053B2 Energy efficient method for growing polycrystalline silicon 有权
公开(公告)号：US07105053B2
公开(公告)日：2006-09-12
申请号：US10367570
申请日：2003-02-13
申请人： Lyle C. Winterton , John P. Hill
发明人： Lyle C. Winterton , John P. Hill
IPC分类号： C30B25/12 , C30B25/14
CPC分类号： C01B33/035 , C30B25/005 , C30B29/06
摘要： Polysilicon dendrites are grown by depositing silicon on a polysilicon rod or other substrate. Surface temperature is increased to a temperature at which needle-like dendrites develop due to the deposition of silicon from silicon-containing molecules in the surrounding reactor atmosphere. Thereafter, the surface temperature is gradually reduced so that silicon that deposits on the needle-like dendrites causes the dendrites to grow and assume a generally flared shape.

6. 发明授权

US06735038B2 Supply variance compensation method for switched voltage mode voice coil motor driver circuit 有权
标题翻译：交流电压模式音圈电机驱动电路的供电方差补偿方法
公开(公告)号：US06735038B2
公开(公告)日：2004-05-11
申请号：US09877278
申请日：2001-06-08
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： G11B2102
CPC分类号： G11B5/5521 , H02P25/034
摘要： A VCM power driver having an input for receiving an external supply voltage VDD. A voltage-mode driver is coupled to the power supply voltage and generates a drive signal to a load. A system processor generates commands indicating a programmed voltage output desired from the voltage-mode driver. A comparator compares VDD to a reference voltage to generate an error signal. A combination mechanism generates a modified command using the error signal. The modified commands are coupled to the voltage-mode driver, such that the voltage-mode driver generates a voltage output based upon the modified command.
摘要翻译：具有用于接收外部电源电压VDD的输入的VCM功率驱动器。电压模式驱动器耦合到电源电压并且向负载产生驱动信号。系统处理器产生指示从电压模式驱动器所需的编程电压输出的命令。比较器将VDD与参考电压进行比较，以产生误差信号。组合机制使用错误信号生成修改的命令。修改的命令耦合到电压模式驱动器，使得电压模式驱动器基于修改的命令产生电压输出。

7. 发明授权

US06584516B1 High-speed servo data interface system 有权
标题翻译：高速伺服数据接口系统
公开(公告)号：US06584516B1
公开(公告)日：2003-06-24
申请号：US09703260
申请日：2000-10-31
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： G06F1300
CPC分类号： G06F3/0613 , G06F3/0655 , G06F3/0674
摘要： The invention provides a high-speed interface that transfers servo position data from the read channel integrated circuit to the drive control integrated circuit or another integrated circuit. The high-speed interface eliminates the need for analog pins on the integrated circuits to lower the cost of the system. The high-speed interface also eliminates the use of the serial interface to transfer the servo position data which speeds up the data transfer. Examples of servo position data include high-resolution servo position data and coarse-resolution servo position data. A read channel integrated circuit transfers the user data and the high-resolution servo position data to a data bus, such as an NRZ bus. The data bus transfers the user data and the high-resolution servo position data to another integrated circuit, such as a drive control integrated circuit. The other integrated circuit receives the user data and the high-resolution servo position data from the data bus. The coarse-resolution servo position data can also be transferred over the data bus.
摘要翻译：本发明提供一种高速接口，其将伺服位置数据从读通道集成电路传送到驱动控制集成电路或另一集成电路。高速接口不需要集成电路上的模拟引脚来降低系统的成本。高速接口也消除了使用串行接口传送伺服位置数据，加快了数据传输速度。伺服位置数据的示例包括高分辨率伺服位置数据和粗分辨率伺服位置数据。读通道集成电路将用户数据和高分辨率伺服位置数据传送到诸如NRZ总线的数据总线。数据总线将用户数据和高分辨率伺服位置数据传送到诸如驱动控制集成电路的另一集成电路。另一个集成电路从数据总线接收用户数据和高分辨率伺服位置数据。粗分辨率伺服位置数据也可以通过数据总线传输。

8. 发明授权

US06225873B1 Frequency shift key modulating oscillator 失效
标题翻译：频移键调制振荡器
公开(公告)号：US06225873B1
公开(公告)日：2001-05-01
申请号：US08566270
申请日：1995-12-01
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： H03C300
CPC分类号： H03C3/16 , H03B5/1847 , H03B5/187 , H03B2201/017
摘要： The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the system comprises a switching device for selecting a first or a second impedance in response to a select signal having a voltage. Each of the first and second impedances is fixed independently of the select signal voltage such that the oscillating output oscillates at the first oscillating frequency when the first impedance is provided and oscillates at the second oscillating frequency when the second impedance is provided.
摘要翻译：本发明教导了一种用于以第一或第二振荡频率可选地振荡的系统。该系统包括用于提供振荡输出的振荡器。此外，该系统包括用于响应于具有电压的选择信号选择第一或第二阻抗的开关装置。第一和第二阻抗中的每一个都是独立于选择信号电压固定的，使得当提供第一阻抗时，振荡输出以第一振荡频率振荡，并且当提供第二阻抗时以第二振荡频率振荡。

9. 发明授权

US6054828A Circuitry and methods for adjusting and switching the gain of a digital-to-analog converter in a disk drive 失效
标题翻译：用于调整和切换磁盘驱动器中数模转换器增益的电路和方法
公开(公告)号：US6054828A
公开(公告)日：2000-04-25
申请号：US216623
申请日：1998-12-16
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： G11B5/596 , G11B21/08 , H03M1/66 , G05B11/01 , G05B13/00 , G11B7/00
CPC分类号： G11B21/085 , H03M1/66 , G11B5/59622
摘要： Disclosed is a tracking control integrated circuit (IC) system implementation and method for controlling the gain of a digital-to-analog converter in a disk drive system. The tracking control IC system includes components defined in integrated circuit chips and components defined on a printed circuit board. The tracking control IC system is configured to be implemented in a disk drive system that includes a disk media. The tracking control IC system includes a servo controller chip that includes a compensator/processor, the digital-to-analog converter, and a switch. The switch is configured to receive a high gain signal (being Low or High) for setting the switch in an open state or a closed state. The tracking control IC system further includes a power amplifier chip having amplifying elements. The power amplifier chip has a first input and a second input, both of which connect to selected ones of the amplifying elements. The digital-to-analog converter includes a first output that is in communication with the switch and the first input of the power amplifier chip. The digital-to-analog converter has a second output that is in communication with the switch, and the switch has an output that is coupled to the first input of the power amplifier chip through the selected amplifying elements. The switch therefore enables the tracking control IC system to have a wider dynamic range control voltage Vc without increasing the die area of the servo control chip, without adding external active components to the PCB, and without increasing the control signal's susceptibility to noise pickup or offsets.
摘要翻译：公开了一种用于控制磁盘驱动器系统中的数模转换器的增益的跟踪控制集成电路（IC）系统实现和方法。跟踪控制IC系统包括在印刷电路板上限定的集成电路芯片和部件中定义的组件。跟踪控制IC系统被配置为在包括盘介质的磁盘驱动器系统中实现。跟踪控制IC系统包括包括补偿器/处理器，数模转换器和开关的伺服控制器芯片。开关被配置为接收高增益信号（低或高），用于将开关置于打开状态或关闭状态。跟踪控制IC系统还包括具有放大元件的功率放大器芯片。功率放大器芯片具有第一输入和第二输入，两者均连接到选定的放大元件。数模转换器包括与开关和功率放大器芯片的第一输入通信的第一输出。数模转换器具有与开关通信的第二输出，并且开关具有通过所选择的放大元件耦合到功率放大器芯片的第一输入的输出。因此，该开关能够使跟踪控制IC系统具有更宽的动态范围控制电压Vc，而不增加伺服控制芯片的管芯面积，而不会增加外部有源元件到PCB，并且不增加控制信号对噪声拾取或偏移的敏感性。

10. 发明授权

US5703584A Analog data acquisition system 失效
标题翻译：模拟数据采集系统
公开(公告)号：US5703584A
公开(公告)日：1997-12-30
申请号：US293973
申请日：1994-08-22
申请人： John P. Hill
发明人： John P. Hill
IPC分类号： G06F17/40 , H03M1/12
CPC分类号： G11B20/10037 , G11B5/59611
摘要： An analog data acquisition system in an integrated circuit automatically processes and stores analog data without sequencing support from a processor. The analog data acquisition system converts each analog input signal into digital data. The digital data are stored in registers in the integrated circuit that are directly readable by a digital signal processor without data moves and are directly usable by the digital signal processor without further processing or conversion. Consequently, the analog data acquisition system minimizes the use of both the digital signal processor and the digital signal processor program memory and leaves capacity, i.e., both processing time and instruction memory locations, for use in other activities. The analog data acquisition system includes an analog input multiplexer and an analog-to-digital (A/D) converter that has an input line that is connected to the analog input multiplexer output line. An acquisition sequencer provides signals to the analog input multiplexer so that a signal on one of the plurality of input lines to the analog input multiplexer is applied to the A/D converter.
摘要翻译：集成电路中的模拟数据采集系统自动处理和存储模拟数据，无需处理器的排序支持。模拟数据采集系统将每个模拟输入信号转换为数字数据。数字数据存储在集成电路中的数字信号处理器可直接读取的寄存器中，无需数据移动，并可直接由数字信号处理器使用，无需进一步处理或转换。因此，模拟数据采集系统最大限度地减少数字信号处理器和数字信号处理器程序存储器的使用，并且留下用于其他活动的容量，即处理时间和指令存储器位置。模拟数据采集系统包括模拟输入多路复用器和具有连接到模拟输入多路复用器输出线的输入线的模拟（A / D）转换器。采集定序器向模拟输入多路复用器提供信号，使得到模拟输入多路复用器的多条输入线之一上的信号被施加到A / D转换器。

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