APPARATUS AND METHOD FOR TESTING MEMORY DEVICES AND CIRCUITS IN INTEGRATED CIRCUITS
    1.
    发明申请
    APPARATUS AND METHOD FOR TESTING MEMORY DEVICES AND CIRCUITS IN INTEGRATED CIRCUITS 审中-公开
    用于测试集成电路中的存储器件和电路的装置和方法

    公开(公告)号:US20080046789A1

    公开(公告)日:2008-02-21

    申请号:US11465864

    申请日:2006-08-21

    IPC分类号: G01R31/28

    摘要: This patent describes a method for varying the amplitude and frequency of power supply oscillations produced by content addressable memories or other critical circuits using BIST. Supply oscillations are produced by performing noisy (high switching activity—high current demand) searches followed by quiet (low switching activity—low current demand) searches. The amplitude and frequency of oscillations can be varied by changing the number of noisy and quiet searches e.g. pattern 1-noisy quiet, noisy, quiet; pattern 2-noisy, noisy, quiet, noisy, noisy, quiet, etc. By going through different patterns the current demand from the CAM macro increases the likelihood of producing worst—case noise and enables testing of CAM operation as well as surrounding circuitry in these noisy conditions.

    摘要翻译: 该专利描述了一种用于改变内容可寻址存储器或使用BIST的其他关键电路产生的电源振荡的幅度和频率的方法。 通过执行噪声(高开关活动 - 高电流需求)搜索,然后进行安静(低开关活动 - 低电流需求)搜索来产生供电振荡。 可以通过改变噪声和安静搜索的数量来改变振荡的振幅和频率。 模式1嘈杂安静,嘈杂,安静; 模式2噪声,嘈杂,安静,嘈杂,嘈杂,安静等。通过不同的模式,来自CAM宏的当前需求增加了产生最坏情况噪声的可能性,并且可以测试CAM操作以及周边电路 这些嘈杂的条件。

    Read channel with automatic servo track writer
    2.
    发明授权
    Read channel with automatic servo track writer 有权
    用自动伺服记录器读通道

    公开(公告)号:US06934103B2

    公开(公告)日:2005-08-23

    申请号:US10293370

    申请日:2002-11-12

    IPC分类号: G11B5/596 G11B5/09

    CPC分类号: G11B5/59633

    摘要: A read channel for a hard disk controller comprising: means for generating a sequence of start of write signals to individually control the start of writing of each of one or more servo sync words to a disk; and means for individually writing the one or more servo sync words to the disk.

    摘要翻译: 一种用于硬盘控制器的读通道,包括:用于产生写入信号开始序列的装置,以单独控制一个或多个伺服同步字中的每一个写入盘的开始; 以及用于将一个或多个伺服同步字单独写入到盘的装置。