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    • 96. 发明授权
    • Two dimensional magnetic recording systems, devices and methods
    • 二维磁记录系统,装置和方法
    • US09431052B2
    • 2016-08-30
    • US14749492
    • 2015-06-24
    • Marvell World Trade Ltd.
    • Mats ObergNitin Nangare
    • G11B5/09G11B20/10G11B5/012G11B5/49G11B5/39
    • G11B20/10046G11B5/012G11B5/02G11B5/3964G11B5/4976G11B20/10009G11B20/10037G11B20/18
    • The present disclosure describes systems and techniques relating to storage devices, such as storage devices that employ Two Dimensional Magnetic Recording (TDMR). According to an aspect of the described systems and techniques, a device includes: a first read channel to process a first input signal obtained from a Two Dimensional Magnetic Recording (TDMR) storage medium using a first read head, wherein the first read channel includes a first analog to digital converter (ADC); a second read channel to process a second input signal obtained from the TDMR, storage medium using a second read head, wherein the second read channel includes a second ADC; and a single digital timing loop (DTL) for both the first read channel and the second read channel, wherein the single DTL is configured to control interpolation of timing of sampling for the first and second ADCs.
    • 本公开描述了与存储设备相关的系统和技术,例如采用二维磁记录(TDMR)的存储设备。 根据所描述的系统和技术的一个方面,一种设备包括:第一读取通道,用于使用第一读取头处理从二维磁记录(TDMR)存储介质获得的第一输​​入信号,其中第一读取通道包括 第一个模数转换器(ADC); 第二读取通道,用于处理从TDMR获得的第二输入信号,使用第二读取头的存储介质,其中所述第二读取通道包括第二ADC; 以及用于第一读取通道和第二读取通道的单个数字定时循环(DTL),其中单个DTL被配置为控制第一和第二ADC的采样定时的内插。
    • 97. 发明授权
    • Systems and methods for adaptive motor speed control
    • 自适应电机速度控制的系统和方法
    • US09425721B2
    • 2016-08-23
    • US14338908
    • 2014-07-23
    • Marvell World Trade LTD.
    • Ravishanker KrishnamoorthyEdy SusantoCheng Yong TeohFoo Leng Leong
    • H02P21/06H02P6/08H02P6/06
    • H02P6/08H02P6/06H02P6/15H02P6/28
    • A system including memory to store a plurality of sets of values, where each set is used to control speed of a different type of motor. A pulse width modulation (PWM) module receives an input indicating a type of motor sensed in the system, selects a set corresponding to the type of the sensed motor, and generates, based on the selected set, a pulse width modulation signal to control speed of the sensed motor. A speed module receives a requested speed for the sensed motor and generates an output indicating a range of speed corresponding to the requested speed. The PWM module selects, based on the range of speed, a value from the selected set; shifts, based on the selected value, the pulse width modulation signal; and adjusts, based on the shifted pulse width modulation signal, the speed of the sensed motor by adjusting torque applied to the sensed motor.
    • 一种包括用于存储多组值的存储器的系统,其中每组用于控制不同类型的电动机的速度。 脉冲宽度调制(PWM)模块接收指示在系统中感测到的电动机的类型的输入,选择与感测到的电动机的类型相对应的一组,并且基于所选择的组生成用于控制速度的脉宽调制信号 的感应电动机。 速度模块接收所感测的电动机的请求速度,并产生指示对应于所请求速度的速度范围的输出。 PWM模块根据速度范围选择来自所选组的值; 基于选择的值移位脉宽调制信号; 并且通过调整施加到感测到的电动机的转矩,基于移动的脉宽调制信号来调整感测电动机的速度。
    • 98. 发明授权
    • Method and apparatus for testing a semiconductor package having a package on package (PoP) design
    • 用于测试具有封装封装(PoP)设计的半导体封装的方法和装置
    • US09423451B2
    • 2016-08-23
    • US14284241
    • 2014-05-21
    • Marvell World Trade Ltd.
    • Yat Fai Leung
    • G01R31/26G01R31/28H01L21/66
    • G01R31/2889G01R31/2863G01R31/2896H01L22/14
    • Embodiments include a testing arrangement for testing a first package, the testing arrangement comprising a frame having a top section and a bottom section, wherein the bottom section of the frame comprises a pickup section, and wherein the pickup section has a first air pathway; a second package mounted on a top surface of the bottom section of the frame such that a second air pathway is defined between (i) the second package and (ii) the top surface of the bottom section of the frame; and a vacuum path defined by (i) the first air pathway and (ii) the second air pathway, wherein during testing of the first package, a vacuum in the vacuum path is generated such that the pickup section of the bottom section of the frame holds the first package.
    • 实施例包括用于测试第一包装件的测试装置,所述测试装置包括具有顶部部分和底部部分的框架,其中所述框架的底部部分包括拾取部分,并且其中所述拾取部分具有第一空气通路; 第二包装,其安装在所述框架的底部的顶部表面上,使得在(i)所述第二包装和(ii)所述框架的所述底部的所述顶部表面之间限定第二空气通道; 以及由(i)第一空气路径和(ii)第二空气路径限定的真空路径,其中在第一包装的测试期间,产生真空路径中的真空,使得框架的底部的拾取部分 拥有第一个包装。
    • 99. 发明授权
    • Memory effect reduction using low impedance biasing
    • 使用低阻抗偏置降低记忆效应
    • US09417641B2
    • 2016-08-16
    • US14532816
    • 2014-11-04
    • Marvell World Trade, Ltd.
    • David M. SignoffMing HeWayne A. Loeb
    • G05F1/46H03H7/01H03F1/30H03F3/24H03F3/26
    • H03F3/245G05F1/46H03F1/301H03F1/308H03F3/195H03F3/265H03F3/505H03F2200/24H03F2200/451H03F2200/453H03F2200/534H03F2200/555H03F2200/69H03H7/0107
    • A circuit includes a bias circuit for a biased transistor. The bias circuit includes a master-slave source follower circuit, a reference transistor, and a bias circuit voltage output coupled to the biased transistor and configured to provide a bias voltage. The reference transistor has a transconductance substantially identical to a transconductance of the biased transistor. A signal ground circuit may be coupled between the biased transistor and one or more components of the bias circuit that do not generate significant return currents to a power supply ground. A method includes generating a current in a reference transistor according to a first voltage generated using a master source follower circuit, generating a second voltage substantially identical to the first voltage using a slave source follower circuit, and providing the second voltage to a biased transistor. The reference transistor has a transconductance substantially identical to a transconductance of the biased transistor.
    • 电路包括用于偏置晶体管的偏置电路。 偏置电路包括主从源极跟随器电路,参考晶体管和耦合到偏置晶体管并被配置为提供偏置电压的偏置电路电压输出。 参考晶体管具有与偏置晶体管的跨导基本相同的跨导。 信号接地电路可以耦合在偏置晶体管和偏置电路的一个或多个组件之间,其不产生对电源接地的大的返回电流。 一种方法包括根据使用主源跟随器电路产生的第一电压在参考晶体管中产生电流,使用从源跟随器电路产生与第一电压基本相同的第二电压,以及将第二电压提供给偏置晶体管。 参考晶体管具有与偏置晶体管的跨导基本相同的跨导。