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1. 发明申请

US20080290863A1 Open Write-Head-Cable Test Method and Detector 有权
标题翻译：打开写头电缆测试方法和检测器
公开(公告)号：US20080290863A1
公开(公告)日：2008-11-27
申请号：US11753377
申请日：2007-05-24
申请人： Jacob L. Dahle , Larry L. Tretter
发明人： Jacob L. Dahle , Larry L. Tretter
IPC分类号： G01R33/12
CPC分类号： G01R33/1207
摘要： A storage drive implements a method for operating the storage drive between a plurality of operational modes. For a test mode of the storage drive, a write current driver circuit and a test current sensor are electrically connected to the write head, wherein the test current sensor generates a sense signal indicative of a degree of a flow of a test current through the write head to thereby facilitate a detection of any presence of an open write condition of the storage drive (i.e., any impedance condition impeding a flow of a write current through the write head). For a write mode of the storage drive, the write current driver circuit is electrically connected to the write head and the test current sensor is electrically disconnected from the write head, wherein the write head records data on a magnetic media based on a flow of the write current through the write head.
摘要翻译：存储驱动器实现在多个操作模式之间操作存储驱动器的方法。对于存储驱动器的测试模式，写入电流驱动器电路和测试电流传感器电连接到写入头，其中测试电流传感器产生指示通过写入的测试电流的流动程度的感测信号从而有助于检测存储驱动器的打开写入条件的任何存在（即，阻碍写入电流通过写入头的流动的任何阻抗条件）。对于存储驱动器的写入模式，写入电流驱动器电路电连接到写入头，并且测试电流传感器与写入头电气断开，其中写入头根据磁头的流动将数据记录在磁性介质上通过写头写入电流。

2. 发明授权

US4195309A Video processing system including comb filters 失效
标题翻译：视频处理系统包括梳状滤波器
公开(公告)号：US4195309A
公开(公告)日：1980-03-25
申请号：US966512
申请日：1978-12-04
申请人： Christopher, Todd J. , Larry L. Tretter
发明人： Christopher, Todd J. , Larry L. Tretter
IPC分类号： H04N9/85 , H04N5/76 , H04N9/78 , H04N9/89 , H04N9/893 , H04N9/535 , H04N5/79
CPC分类号： H04N9/78 , H04N9/893
摘要： In a video processing system including comb filters for separating interleaved luminance and chrominance components, the time of occurrence of the color synchronizing component of the composite color video signal is detected after the comb filtering and separating of the luminance and chrominance components. The composite signal components include spurious frequency variations which accompany the composite signal during playback from a video disc. A first phase locked loop coupled to a frequency translator is used to remove the spurious frequency variations from the separated and frequency translated chrominance components. A second phase locked loop is connected between a second frequency translator and a clock controlled delay line. The second phase locked loop tracks the spurious frequency variations in a manner to assure that accurate combing of the component signals occurs at the output of the comb filters. The same reference frequency is used in the first phase locked loop as well as in the second frequency translator.
摘要翻译：在包括用于分离交错亮度和色度分量的梳状滤波器的视频处理系统中，在梳状滤波和分离亮度和色度分量之后检测复合彩色视频信号的颜色同步分量的出现时间。复合信号分量包括在从视频盘重放期间伴随复合信号的杂散频率变化。耦合到频率转换器的第一锁相环用于从分离和频率转换的色度分量中去除寄生频率变化。第二个锁相环连接在第二个频率转换器和时钟控制的延迟线之间。第二个锁相环以一种方式跟踪杂散频率变化，以确保在梳状滤波器的输出处发生分量信号的精确梳理。在第一个锁相环以及第二个频率转换器中使用相同的参考频率。

3. 发明授权

US07729072B2 Open write-head-cable test method and detector 有权
标题翻译：打开写头电缆测试方法和检测器
公开(公告)号：US07729072B2
公开(公告)日：2010-06-01
申请号：US11753377
申请日：2007-05-24
申请人： Jacob L. Dahle , Larry L. Tretter
发明人： Jacob L. Dahle , Larry L. Tretter
IPC分类号： G11B5/09
CPC分类号： G01R33/1207
摘要： A storage drive implements a method for operating the storage drive between a plurality of operational modes. For a test mode of the storage drive, a write current driver circuit and a test current sensor are electrically connected to the write head, wherein the test current sensor generates a sense signal indicative of a degree of a flow of a test current through the write head to thereby facilitate a detection of any presence of an open write condition of the storage drive (i.e., any impedance condition impeding a flow of a write current through the write head). For a write mode of the storage drive, the write current driver circuit is electrically connected to the write head and the test current sensor is electrically disconnected from the write head, wherein the write head records data on a magnetic media based on a flow of the write current through the write head.
摘要翻译：存储驱动器实现在多个操作模式之间操作存储驱动器的方法。对于存储驱动器的测试模式，写入电流驱动器电路和测试电流传感器电连接到写入头，其中测试电流传感器产生指示通过写入的测试电流的流动程度的感测信号从而有助于检测存储驱动器的打开写入条件的任何存在（即，阻碍写入电流通过写入头的流动的任何阻抗条件）。对于存储驱动器的写入模式，写入电流驱动器电路电连接到写入头，并且测试电流传感器与写入头电气断开，其中写入头根据磁头的流动将数据记录在磁性介质上通过写头写入电流。

4. 发明申请

US20070279808A1 Sensing mechanism for reading magnetic storage medium 审中-公开
标题翻译：读磁存储介质的检测机制
公开(公告)号：US20070279808A1
公开(公告)日：2007-12-06
申请号：US11443570
申请日：2006-05-31
申请人： Icko E.T. Iben , Larry L. Tretter
发明人： Icko E.T. Iben , Larry L. Tretter
IPC分类号： G11B5/33 , G11B5/127
CPC分类号： G11B5/39 , G11B2005/0018
摘要： A sensing mechanism for reading a magnetic storage medium includes first and second variable resistive elements, and sensing elements. Each first and second variable resistive element has a variable resistance. Each sensing element has a resistance depending at least on a portion of the medium currently being read. First and second ends of each sensing element are electrically connected to corresponding first and second variable resistive elements, respectively. For each sensing element, the resistance value of the first variable resistive element to which it is electrically connected is equal to the resistance of the second variable resistive element to which it is electrically connected, so that a mid-point voltage at each sensing element is equal. For each sensing element, the variable resistances of the first and second variable resistive elements to which it is electrically connected are selected so that the desired current flows through the sensing element.
摘要翻译：用于读取磁存储介质的感测机构包括第一和第二可变电阻元件以及感测元件。每个第一和第二可变电阻元件具有可变电阻。每个感测元件具有至少取决于当前正在读取的介质的一部分的电阻。每个感测元件的第一和第二端分别电连接到对应的第一和第二可变电阻元件。对于每个感测元件，与其电连接的第一可变电阻元件的电阻值等于与其电连接的第二可变电阻元件的电阻，使得每个感测元件处的中点电压为等于。对于每个感测元件，选择与其电连接的第一和第二可变电阻元件的可变电阻，使得期望的电流流过感测元件。

5. 发明授权

US5373253A Monolithic current mirror circuit employing voltage feedback for .beta.-independent dynamic range 失效
标题翻译：采用电压反馈的独立动态范围的单片电流镜电路
公开(公告)号：US5373253A
公开(公告)日：1994-12-13
申请号：US124178
申请日：1993-09-20
申请人： James A. Bailey , James E. Malmberg , Larry L. Tretter
发明人： James A. Bailey , James E. Malmberg , Larry L. Tretter
IPC分类号： H03F3/345 , H03F3/24
CPC分类号： H03F3/345
摘要： A monolithic bipolar current mirror circuit having linear mirror-gain over four orders of current magnitude independent of device-beta (even if .beta..fwdarw.1). A third bipolar feedback transistor coupled to a unipolar buffer transistor provides voltage feedback to eliminate input loading and thereby eliminate the dependence of mirror-gain on device current-gain. The bipolar current mirror circuit can be frequency compensated and can be implemented using either PNP or NPN devices in BiCmos integrated circuit technology.
摘要翻译：具有独立于器件-β的四个数量级的线性镜像增益的单片双极电流镜电路（即使β→1）。耦合到单极缓冲晶体管的第三双极反馈晶体管提供电压反馈以消除输入负载，从而消除镜增益对器件电流增益的依赖性。双极电流镜电路可以进行频率补偿，可以使用BiCmos集成电路技术中的PNP或NPN器件实现。

6. 发明申请

US20080290908A1 Variable Power Write Driver Circuit 有权
标题翻译：可变功率写入驱动器电路
公开(公告)号：US20080290908A1
公开(公告)日：2008-11-27
申请号：US11752795
申请日：2007-05-23
申请人： Larry L. Tretter
发明人： Larry L. Tretter
IPC分类号： H03K3/00
CPC分类号： G11B5/09 , G11B5/022
摘要： A storage system (e.g., a magnetic disk system or a magnetic tape system) employing a write head, a write controller and a write driver circuit. In operation, the write head records data on a magnetic media (e.g., a magnetic tape or a magnetic disk) based on a flow of a write current through the write head, and the write driver circuit includes a variable power supply network and a variable power return network driving the write current through the write head based on a selection by the write controller of an operating power mode among a plurality of selectable power modes of the variable power supply network and the variable power return network. Each power mode of the variable power supply network and the variable power return network drives the write current with a different magnitude from the variable power supply network through the write head to the variable power return network.
摘要翻译：采用写入头，写入控制器和写入驱动器电路的存储系统（例如，磁盘系统或磁带系统）。在操作中，写入头基于通过写入头的写入电流的流动将数据记录在磁性介质（例如，磁带或磁盘）上，并且写入驱动器电路包括可变电源网络和可变电源功率返回网络基于写入控制器在可变供电网络和可变功率返回网络的多个可选功率模式中的操作功率模式的选择来驱动写入电流。可变供电网络和可变功率回流网络的每个功率模式通过写入头向可变功率返回网络驱动具有与可变供电网络不同大小的写入电流。

7. 发明授权

US06882491B2 Dual mode write driver providing both voltage and current mode operation 失效
标题翻译：双模式写驱动器提供电压和电流模式操作
公开(公告)号：US06882491B2
公开(公告)日：2005-04-19
申请号：US10283752
申请日：2002-10-30
申请人： Larry L. Tretter
发明人： Larry L. Tretter
IPC分类号： G11B5/09 , G11B5/02
CPC分类号： G11B5/09
摘要： A dual mode write driver, such as in a tape or disk drive system, provides both a voltage mode of operation and a current mode of operation by combining the required topology in a write driver circuit. A logic control signal applied to an input to the dual mode write driver causes the circuit to configure for either mode. The write driver has a first PFET (P3) coupled to a first NFET (N1) at a first node connected through a resistor (R1) to a first side of a write head (L1) of the write driver, and a second PFET (P4) coupled to a second NFET (N2) at a second node connected through a resistor (R2) to a second side of the write head. A first voltage mode NFET device is turned on during the voltage mode to connect the sources of the first and second NFET devices to ground.
摘要翻译：诸如在磁带或磁盘驱动器系统中的双模式写入驱动器通过在写入驱动器电路中组合所需的拓扑来提供电压工作模式和当前操作模式。施加到双模式写入驱动器的输入的逻辑控制信号使电路配置为任一模式。写入驱动器具有在通过电阻器（R 1）连接到写入驱动器的写入头（L1）的第一侧的第一节点处耦合到第一NFET（N 1）的第一PFET（P 3），以及在通过电阻器（R 2）连接到写入头的第二侧的第二节点处耦合到第二NFET（N 2）的第二PFET（P 4）。在电压模式期间，第一电压模式NFET器件导通，以将第一和第二NFET器件的源极连接到地。

8. 发明授权

US06882485B2 Method and system to measure the write current of a current mode write driver in a direct way 失效
标题翻译：以直接方式测量当前模式写入驱动器的写入电流的方法和系统
公开(公告)号：US06882485B2
公开(公告)日：2005-04-19
申请号：US10283753
申请日：2002-10-30
申请人： Larry L. Tretter
发明人： Larry L. Tretter
IPC分类号： G11B5/02 , G11B27/36
CPC分类号： G11B5/02
摘要： A method and system for calibrating the write current of a current mode write driver having a first PFET coupled to a first NFET at a first node connected to a first side of a write head of the write driver, and a second PFET coupled to a second NFET at a second node connected to a second side of the write head. The write driver also defines an INODE where a source of the first NFET is coupled to a source of the second NFET, and the write driver is put in a state where all FET devices are in an off condition. A precision resistor R is connected from the NODE I/O pin of the write driver to a positive potential VDD I/O pin of the write driver, causing a current I1 to flow, where I1=V/R, and V is a voltage across the resistor.
摘要翻译：一种用于校准电流模式写入驱动器的写入电流的方法和系统，该电流模式写入驱动器具有耦合到第一NFET的第一PFET，该第一PFET连接到写入驱动器的写入头的第一侧，第二PFET耦合到第二 NFET连接到写入头的第二侧的第二节点处。写入驱动器还定义了INODE，其中第一NFET的源极耦合到第二NFET的源极，并且写入驱动器处于所有FET器件处于截止状态的状态。精密电阻R从写入驱动器的NODE I / O引脚连接到写驱动器的正电位VDD I / O引脚，导致电流I1流动，其中I1 = V / R，V为电压跨过电阻

9. 发明授权

US4937469A Switched current mode driver in CMOS with short circuit protection 失效
标题翻译： CMOS开关电流模式驱动器具有短路保护功能
公开(公告)号：US4937469A
公开(公告)日：1990-06-26
申请号：US238090
申请日：1988-08-30
申请人： Tony R. Larson , Larry L. Tretter
发明人： Tony R. Larson , Larry L. Tretter
IPC分类号： G06F3/00 , G05F3/26 , H03K17/06 , H03K17/687
CPC分类号： H03K17/063 , G05F3/262
摘要： An improved MOS switched current mode drive circuit designed for use in systems interfacing multiple peripheral devices with one or more CPU units attached to a 360/370 channel.

10. 发明授权

US4812687A Dual direction integrating delay circuit 失效
标题翻译：双向积分延迟电路
公开(公告)号：US4812687A
公开(公告)日：1989-03-14
申请号：US218728
申请日：1988-07-13
申请人： Tony R. Larson , Larry L. Tretter
发明人： Tony R. Larson , Larry L. Tretter
IPC分类号： H03K5/04 , H03K5/13 , G05F3/16 , H03K3/29
CPC分类号： H03K5/13 , H03K5/04
摘要： A CMOS circuit that provides an output pulse having rising and falling edges that are delayed by predetermined different amounts from the rising and falling edges of an input pulse.
摘要翻译：提供具有上升沿和下降沿的输出脉冲的CMOS电路，其从输入脉冲的上升沿和下降沿延迟预定的不同量。

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