Process for compensating matching errors in analog/digital converters with cascaded structure and a corresponding converter
    141.
    发明申请
    Process for compensating matching errors in analog/digital converters with cascaded structure and a corresponding converter 审中-公开
    用于补偿具有级联结构的模/数转换器中的匹配误差的过程和相应的转换器

    公开(公告)号:US20020126028A1

    公开(公告)日:2002-09-12

    申请号:US10024466

    申请日:2001-12-17

    CPC classification number: H03M3/344 H03M3/46

    Abstract: A test signal with given spectral characteristics is injected at input to the quantizer stage of the converter. The same test signal is subjected to cross-correlation with a given signal so as to generate coefficients used for filtering the quantization noise converted into digital form. In this way, a compensation signal is obtained that is applied to the output signal of the quantizer stage jointly with a first compensation signal obtained by applying, to the quantization noise converted into digital form, the same transfer function 28) of the converter. In this way a signal is obtained which, in addition to being used as the global output signal of the converter, is also used for the aforesaid operation of cross-correlation with the test signal.

    Abstract translation: 具有给定频谱特性的测试信号在输入端被注入到转换器的量化器级。 相同的测试信号经受与给定信号的互相关,以便产生用于滤波转换为数字形式的量化噪声的系数。 以这种方式,获得补偿信号,该补偿信号与通过将转换成数字形式的量化噪声相同的传递函数28获得的第一补偿信号一起应用于量化器级的输出信号。 以这种方式,获得了除了用作转换器的全局输出信号之外,还用于上述与测试信号互相关的操作的操作的信号。

    Read/write transducer for hard disk drives with optical position measuring system, and manufacturing process thereof
    144.
    发明申请
    Read/write transducer for hard disk drives with optical position measuring system, and manufacturing process thereof 有权
    用于具有光学位置测量系统的硬盘驱动器的读/写传感器及其制造过程

    公开(公告)号:US20020109931A1

    公开(公告)日:2002-08-15

    申请号:US10001922

    申请日:2001-11-13

    CPC classification number: G01R33/0286 G11B5/59677

    Abstract: Described herein is a read/write transducer for a hard disk drivewith dual actuation stage, comprising at least one hard disk and at least one suspension carrying the read/write transducer. The read/write transducer comprises a supporting body having a substantially parallelepipedal shape, a read/write head arranged on a front face of the supporting body, and a grating defined on one of the side faces of the supporting body during the process of manufacture of the read/write transducer. The grating enables measurement of the position of the read/write transducer with respect to the corresponding suspension in an optical way using a laser transmitter emitting and directing towards the grating a laser beam, and a laser receiver arranged to intercept the laser beam reflected by the grating and outputting a position signal on the basis of which it is possible to calculate, in a simple way, the position of the read/write transducer with respect to the corresponding suspension.

    Abstract translation: 这里描述了一种用于具有双驱动级的硬盘驱动器的读/写换能器,包括至少一个硬盘和至少一个承载读/写换能器的悬架。 读/写换能器包括具有基本上平行六面体形状的支撑体,布置在支撑体的前表面上的读/写头和在制造过程中在支撑体的一个侧面上限定的光栅 读/写传感器。 该光栅能够使用激光发射器以光学方式测量读/写换能器相对于相应悬架的位置,该激光发射器向激光束发射和指向光栅;以及激光接收器,被布置成拦截由 光栅并输出位置信号,基于此可以以简单的方式计算读/写换能器相对于相应悬架的位置。

    Output buffer with constant switching current
    145.
    发明申请
    Output buffer with constant switching current 有权
    具有恒定开关电流的输出缓冲器

    公开(公告)号:US20020097071A1

    公开(公告)日:2002-07-25

    申请号:US10032232

    申请日:2001-12-21

    CPC classification number: G11C7/1051 H03K19/00361

    Abstract: The buffer has an output stage formed by two complementary MOS transistors connected so as to operate in phase opposition between the supply terminals and two driver stages having the input in common. Each driver stage has a first branch comprising a current-generator connected between the gate electrode of the transistor to be driven and a supply terminal and an electronic switch controlled by the input and connected between the same gate electrode and the other supply terminal, and a second branch which comprises, connected in series, a transistor connected as a diode and an electronic switch controlled by the output, and is arranged between the gate electrode of the transistor to be driven and a respective supply terminal. The buffer can control a load with a constant switching current, is simple in structure, and occupies a small area.

    Abstract translation: 缓冲器具有由两个互补MOS晶体管形成的输出级,所述两个互补MOS晶体管被连接以在电源端子和具有共同输入的两个驱动器级之间相对操作。 每个驱动器级具有第一分支,包括连接在待驱动晶体管的栅电极与供电端子之间的电流发生器和由输入控制并连接在同一栅电极和另一供电端子之间的电子开关, 第二分支,其包括串联连接的二极管的晶体管和由输出控制的电子开关,并且被布置在待驱动的晶体管的栅电极和相应的供电端子之间。 缓冲器可以用恒定的开关电流来控制负载,结构简单,占用面积小。

    Manufacturing method of an electronic device package
    146.
    发明申请
    Manufacturing method of an electronic device package 有权
    电子器件封装的制造方法

    公开(公告)号:US20020093120A1

    公开(公告)日:2002-07-18

    申请号:US10036335

    申请日:2001-12-26

    Abstract: A method is for forming a plastic protective package for an electronic device integrated on a semiconductor and comprising an electronic circuit to be encapsulated in the protective package. The electronic device may be at least partially activated from outside of the protective package. The method may include providing a mold having a half-mold with an insert abutting towards the inside of the mold and an end having an element that can be elastically deformed to abut in pressing contact against at least one portion of the integrated circuit. The method may also include injecting a resin into the mold so that the protective package has a hole by the at least one portion of the electronic circuit.

    Abstract translation: 一种用于形成用于集成在半导体上的电子器件的塑料保护封装件的方法,包括要封装在保护封装中的电子电路。 电子设备可以至少部分地从保护包装的外部激活。 该方法可以包括提供具有半模的模具,其具有与模具内部邻接的插入件,端部具有能够弹性变形以抵抗与集成电路的至少一部分压接的元件。 该方法还可以包括将树脂注入到模具中,使得保护包装件通过电子电路的至少一部分具有孔。

    Interlaced memory device with random or sequential access
    147.
    发明申请
    Interlaced memory device with random or sequential access 有权
    具有随机或顺序访问的隔行存储器件

    公开(公告)号:US20020087817A1

    公开(公告)日:2002-07-04

    申请号:US09977561

    申请日:2001-10-15

    CPC classification number: G11C7/1033 G11C7/1045

    Abstract: A multipurpose interlaced memory device functions in two different modes, synchronous and asynchronous. The memory uses a circuit for detecting address transitions by acting as a synchronous clock of the system for letting the control circuit of the memory device recognize the required access mode by enabling a comparison of the currently input external address with the one stored in the address counters of the two banks of memory cells. The memory device includes a buffer for outputting data. The buffer includes a circuit for pre-charging the output nodes to an intermediate voltage between the voltages corresponding to the two possible logic states, thus reducing noise and improving transfer time.

    Abstract translation: 多用途隔行存储器件具有两种不同的同步和异步模式。 存储器使用用于检测地址转换的电路,用作系统的同步时钟,以通过使当前输入的外部地址与存储在地址计数器中的当前输入的外部地址进行比较来使存储器件的控制电路识别所需的访问模式 的两行记忆体。 存储装置包括用于输出数据的缓冲器。 缓冲器包括用于将输出节点预充电到对应于两个可能逻辑状态的电压之间的中间电压的电路,从而降低噪声并改善传输时间。

    Circuit architecture for performing a trimming operation on integrated circuits
    148.
    发明申请
    Circuit architecture for performing a trimming operation on integrated circuits 失效
    用于在集成电路上执行修整操作的电路架构

    公开(公告)号:US20020080658A1

    公开(公告)日:2002-06-27

    申请号:US09996082

    申请日:2001-11-28

    CPC classification number: G06F11/006 H01L2223/5444

    Abstract: A circuit architecture and a method for performing a trimming operation directly on an application board, or after the operation of packaging integrated electronic devices. The circuit architecture includes at least one non-volatile memory unit (3) having non-volatile memory elements (5) and a circuit (17,19) for modifying the state of the memory elements (5), a first multifunctional input pin (8) whereon a sequence (25) of trimming data is received, a second multifunctional input pin (9) whereon a timing signal of the trimming operations is received, and an additional access pin (7) for switching the circuit architecture operation from a normal mode over to a trimming mode. This circuit architecture further includes a volatile memory unit (2) associated with the non-volatile memory unit (3) for storing the non-volatile memory (3) state at power-on or at a simulating phase, and storing the sequence (25) of trimming data at a programming phase; an interface (6) is provided between the first multifunctional input pin (8), the second multifunctional input pin (9), and the additional access pin (7), the at least one non-volatile memory unit (3), and the volatile memory unit (2), for initially storing the sequence of trimming data (25) into the volatile memory unit (2) and subsequently timing the trimming operation.

    Abstract translation: 一种用于在应用板上直接执行修整操作或者在封装集成电子设备之后进行修整操作的电路架构和方法。 电路架构包括至少一个具有非易失性存储元件(5)的非易失性存储器单元(3)和用于修改存储元件(5)的状态的电路(17,19),第一多功能输入引脚 8),其中接收到修剪数据的序列(25),其中接收到修剪操作的定时信号的第二多功能输入引脚(9)和用于将电路架构操作从正常切换的附加接入引脚(7) 模式切换到修剪模式。 该电路架构还包括与非易失性存储器单元(3)相关联的易失性存储器单元(2),用于在通电或模拟阶段存储非易失性存储器(3)状态,并存储序列(25 )在编程阶段修剪数据; 在第一多功能输入引脚(8),第二多功能输入引脚(9)和附加存取引脚(7)之间提供接口(6),所述至少一个非易失性存储单元(3)和 易失性存储器单元(2),用于初始将修整数据(25)的序列存储到易失性存储器单元(2)中,并且随后对修整操作进行定时。

    Managing system and synchronization method for a plurality of VRM-type modules
    149.
    发明申请
    Managing system and synchronization method for a plurality of VRM-type modules 有权
    管理多个VRM型模块的系统和同步方法

    公开(公告)号:US20020073347A1

    公开(公告)日:2002-06-13

    申请号:US09982132

    申请日:2001-10-16

    CPC classification number: G06F1/26 Y10T307/505 Y10T307/555

    Abstract: A managing system manages a plurality of VRMs associated with a plurality of microprocessors and connected in parallel together between first and second voltage references, the VRMs having output terminals connected together and arranged to communicate over a common bus. The managing system includes an error amplifier being input an output voltage signal from the VRM plurality, a reference voltage, and a droop voltage produced through an equivalent droop resistor receiving an output current signal from the VRM plurality and being connected to the common bus. The error amplifier effects a comparison of the input signals to generate a control voltage signal to the VRM plurality. Advantageously, the managing system comprises a controller connected to the equivalent droop resistor.

    Abstract translation: 管理系统管理与多个微处理器相关联并且在第一和第二电压基准之间并联连接的多个VRM,所述VRM具有连接在一起的输出端子并被布置成通过公共总线进行通信。 管理系统包括误差放大器,其输入来自VRM多个的输出电压信号,参考电压以及通过从VRM多路复用并连接到公共总线的等效下降电阻产生的下降电压。 误差放大器对输入信号进行比较,以产生对VRM多个的控制电压信号。 有利地,管理系统包括连接到等效下降电阻器的控制器。

    Method for dynamic matching of the elements of an integrated multibit digital-to-analog converter with balanced output for audio applications

    公开(公告)号:US20020063648A1

    公开(公告)日:2002-05-30

    申请号:US09972751

    申请日:2001-10-05

    CPC classification number: H03M1/0682 H03M1/0665 H03M1/74

    Abstract: A method for digital-to-analog conversion of a digital input code into a first output analog signal and a second output analog signal to be supplied to a first terminal and a second terminal, respectively, of an audio load, the conversion being performed by means of a DAC with N-level balanced output, the conversion method includes using N/2 positive generator elements supplying respective positive elementary contributions which are nominally equal to one another, and N/2 negative generator elements supplying respective negative elementary contributions which are nominally equal to one another and, in absolute value, equal to the positive elementary contributions; attributing the same progressive addresses to the positive generator elements and to the negative generator elements; defining a first index for the positive input codes and a second index for the negative input codes; and, in the presence of an input code at the input of the DAC, selecting between the first index and the second index, the index corresponding to the sign of the input code; activating a first set of positive generator elements and a second set of negative generator elements, the number of the positive generator elements activated and the number of the negative generator elements activated being equal to one another and proportional to the input code, and the addresses of the positive generator elements activated and of the negative generator elements activated being a function of the selected index; generating the first output analog signal by summing the positive elementary contributions supplied by the positive generator elements activated, and generating the second output analog signal by summing the negative elementary contributions supplied by the negative generator elements activated; and updating the selected index according to the input code.

Patent Agency Ranking