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    • 1. 发明授权
    • Evaluation circuit for an anti-fuse
    • 防熔断器评估电路
    • US06549063B1
    • 2003-04-15
    • US10044470
    • 2002-01-11
    • Gunther LehmannUlrich Frey
    • Gunther LehmannUlrich Frey
    • H01H3776
    • H01L23/5256G01R31/07G11C17/18H01L2924/0002H01L2924/00
    • The present invention provides for evaluating a programmable anti-fuse element. For a programmable transistor anti-fuse, the gate of the anti-fuse is precharged with a predetermined voltage and/or current and the anti-fuse is subsequently evaluated. In one embodiment a precharge voltage sufficient to turn ON a transistor is provided to the gate. Here, an intact (unblown) transistor remains ON over a period of time and a damaged (blown) transistor dissipates the charge voltage and turns OFF. The status of the transistor is subsequently determined by evaluating the resistance between the drain and source. A high resistance indicates a blown condition and a low resistance indicates an unblown condition. In another embodiment, a small current is provided to the gate in which the small current is greater than a leakage current for an intact transistor and is less than a leakage current for a damaged transistor. An intact transistor charges to an ON state over a period of time but a damaged transistor does not because it's leakage current is greater than the small current provided to the gate. Again, the status of the transistor anti-fuse is subsequently determined by evaluating the resistance between the drain and source.
    • 本发明提供了一种可编程反熔丝元件的评估。 对于可编程晶体管反熔丝,反熔丝的栅极以预定的电压和/或电流进行预充电,并且随后评估反熔丝。 在一个实施例中,向栅极提供足以导通晶体管的预充电电压。 这里,一个完整的(未吹制的)晶体管在一段时间内保持导通,并且损坏的(熔断)晶体管消耗充电电压并且关断。 随后通过评估漏极和源极之间的电阻来确定晶体管的状态。 高电阻表示吹出状态,低电阻表示未吹出状态。 在另一个实施例中,小电流被提供给栅极,其中小电流大于完整晶体管的漏电流,并且小于损坏晶体管的漏电流。 完整的晶体管在一段时间内充电到ON状态,但损坏的晶体管不是因为其漏电流大于提供给栅极的小电流。 再次,晶体管反熔丝的状态随后通过评估漏极和源极之间的电阻来确定。
    • 2. 发明授权
    • Self-terminating blow process of electrical anti-fuses
    • 电气自保险的自终止吹风过程
    • US06642602B2
    • 2003-11-04
    • US10017036
    • 2001-12-14
    • Gunther LehmannUlrich FreyOliver Weinfurtner
    • Gunther LehmannUlrich FreyOliver Weinfurtner
    • H01L2900
    • G11C17/18
    • An anti-fuse system composed of a multiplicity of anti-fuse circuits (24, 26, 28, N) connected across a voltage source (10) by a pair of conductors (16, 18). Each anti-fuse circuit comprising an anti-fuse (30) connected in a series with a blow or control transistor (36) and a control circuit (44) for monitoring the status of the anti-fuse (30), Control circuit (44) provides an “on” signal to the gate (38) of control transistor (36) only when a_“select_” signal is received at an input (46) of control circuit (44) and if anti-fuse (30) has not been blown. After the anti-fuse (30) is blown, control circuit (44) turns off the control transistor (36) thereby providing a constant power source voltage across each anti-fuse circuit (24, 26, 28, N) regardless of the number of parallel anti-fuses which have been blown.
    • 由多个由一对导体(16,18)跨过电压源(10)连接的反熔丝电路(24,26,28,N)组成的反熔丝系统。 每个反熔丝电路包括与吹扫或控制晶体管(36)串联连接的反熔丝(30)和用于监视反熔丝(30)的状态的控制电路(44),控制电路(44) 只有当控制电路(44)的输入端(46)接收到a_“select_”信号,并且如果反熔丝(30)没有被接收,则仅向控制晶体管(36)的栅极(38)提供“接通”信号 被吹了 在防熔丝(30)熔断之后,控制电路(44)关闭控制晶体管(36),从而在每个反熔丝电路(24,26,28,N)上提供恒定的电源电压,而不管数量如何 平行的保险丝已被吹制。
    • 9. 发明授权
    • Dynamic memory refresh circuitry
    • 动态内存刷新电路
    • US06603694B1
    • 2003-08-05
    • US10068789
    • 2002-02-05
    • Gerd FrankowskyGunther Lehmann
    • Gerd FrankowskyGunther Lehmann
    • G11C700
    • G11C11/406
    • A circuit for refreshing data stored in an array of dynamic memory cells is provided. The circuit includes an integrated circuit chip. The chip has the array of memory cells formed thereon. The circuit also includes a refresh rate analysis circuit for determining data retention times in each one of the memory cells and from such determination refresh address modification signals. Also provided is a refresh address generator formed on the chip and fed by refresh command signals generated externally of the chip and by the address modification signals. The refresh address generator supplies an internal refresh commands along with refresh addresses to the array of memory cells. The cells have data stored therein refreshed in response to such internal refresh commands. The refresh rate analysis circuit determines cells in the array having data retention times less than a predetermined value.
    • 提供了用于刷新存储在动态存储单元阵列中的数据的电路。 该电路包括集成电路芯片。 芯片具有形成在其上的存储单元阵列。 该电路还包括用于确定每个存储器单元中的数据保持时间的刷新率分析电路,以及这些确定刷新地址修改信号。 还提供了一种刷新地址生成器,其形成在芯片上并由芯片外部产生的刷新命令信号和地址修改信号馈送。 刷新地址生成器向内存单元阵列提供内部刷新命令以及刷新地址。 小区具有响应于这种内部刷新命令刷新的数据。 刷新率分析电路确定具有小于预定值的数据保留时间的阵列中的单元。
    • 10. 发明授权
    • Sense amplifier
    • 感应放大器
    • US06404019B1
    • 2002-06-11
    • US09676870
    • 2000-09-29
    • Armin M. ReithTina LeidingerGunther Lehmann
    • Armin M. ReithTina LeidingerGunther Lehmann
    • H01L2994
    • G11C7/065H01L27/10897
    • A sense amplifier for use with a dynamic random access memory is formed in a silicon integrated circuit. The pitch of an array of such sense amplifiers is equal to the pitch of pairs of bit lines of a memory array. Each array of sense amplifiers is formed from four rows of transistors of a given n or p-channel type Metal Oxide Semiconductor (MOS) transistor having a U-shaped gate electrode. The gate electrode of the transistors in each row of transistors of the sense amplifier is offset from those in a previous row by a preselected amount. The bit lines passing through the sense amplifier are straight, with no offsets to affect photolithographic performance, and no protuberances to increase the capacitance of the bit lines. Such an array of sense amplifiers has a size equivalent to the minimum size of the pairs of bit lines, and thus does not cause any increase in the width of the array of memory cells.
    • 在硅集成电路中形成用于动态随机存取存储器的读出放大器。 这种读出放大器的阵列的间距等于存储器阵列的位线对的间距。 每个读出放大器阵列由具有U形栅电极的给定n或p沟道型金属氧化物半导体(MOS)晶体管的四行晶体管形成。 读出放大器的每行晶体管中的晶体管的栅电极以预先选定的量偏离前一行。 通过读出放大器的位线是直的,没有偏移影响光刻性能,也没有突起增加位线的电容。 这种读出放大器阵列的尺寸等于位线对的最小尺寸,因此不会导致存储器单元阵列的宽度的任何增加。