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    • 42. 发明授权
    • Semiconductor memory having redundancy circuit
    • 具有冗余电路的半导体存储器
    • US5265055A
    • 1993-11-23
    • US818434
    • 1991-12-27
    • Masashi HoriguchiJun EtohMasakazu AokiKiyoo Itoh
    • Masashi HoriguchiJun EtohMasakazu AokiKiyoo Itoh
    • G11C29/00G11C7/00
    • G11C29/80G11C29/808G11C29/781
    • A redundancy technique is introduced for a semiconductor memory and, more particularly a redundancy technique for a dynamic random access memory (DRAM) having a storage capacity of 16 mega bits or more. In such a DRAM, the efficiency of the redundancy technique is reduced, since a memory array is divided into a large number of memory mats. According to the present redundancy technique, in a semiconductor memory including a memory array which has a plurality of word lines, a plurality of bit lines arranged so that two-level crossings are formed between the word lines and the bit lines, and memory cells disposed at desired ones of the two-level crossings, there is provided, furthermore, a plurality of spare word (or bit) lines, address comparing circuits for storing therein a defective address existing in the memory array, to compare an address to be accessed with the defective address, and selection circuitry for replacing a word or bit line including a defective memory cell by a spare word (or bit) line in accordance with the result of the comparison. The memory array of the semiconductor memory is divided into M memory mats (where M .gtoreq.2), the number m of word or bit lines which are simultaneously replaced by spare word (or bit) lines, is less than the number M and equal to a divisor thereof, and the number L of spare word (or bit) lines per one memory mat and the number R of address comparing circuits satisfy a relation L
    • 为半导体存储器引入冗余技术,更具体地说,涉及具有16兆位或更多存储容量的动态随机存取存储器(DRAM)的冗余技术。 在这样的DRAM中,冗余技术的效率降低,因为存储器阵列被分成大量的存储器垫。 根据本冗余技术,在包括具有多个字线的存储器阵列的半导体存储器中,布置成使得在字线和位线之间形成两级交叉的多个位线,并且设置存储单元 此外,在两级交叉口中的期望的一个处,还提供了多个备用字(或位)线,地址比较电路,用于在其中存储存在存储器阵列中的缺陷地址,以将要访问的地址与 缺陷地址和用于根据比较结果用备用字(或位)行替换包括有缺陷存储单元的字或位线的选择电路。 半导体存储器的存储器阵列被分成M个存储器垫(其中M> / = 2),由备用字(或位)线同时替换的字或位线的数量m小于数M, 每个存储器垫的备用字(或位)的数量L和地址比较电路的数量R满足L
    • 45. 发明授权
    • Semiconductor device
    • 半导体器件
    • US08264893B2
    • 2012-09-11
    • US13238114
    • 2011-09-21
    • Binhaku TaruishiHiroki MiyashitaKen ShibataMasashi Horiguchi
    • Binhaku TaruishiHiroki MiyashitaKen ShibataMasashi Horiguchi
    • G11C7/00
    • G11C7/1084G11C7/1066G11C7/1078G11C7/1093G11C7/1096
    • A data input buffer is changed from an inactive to an active state after the reception of instruction for a write operation effected on a memory unit. The input buffer is a differential input buffer having interface specs based on SSTL, for example, which is brought to an active state by turning on a power switch to cause a through current to flow and receives a signal therein while immediately following a small change in small-amplitude signal. Since the input buffer is brought to the active state only when the write operation's instruction for the memory unit is provided, it is rendered inactive in advance before the instruction is provided, whereby wasteful power consumption is reduced. In another aspect, power consumption is reduced by changing from the active to the inactive state in a time period from a write command issuing to a next command issuing.
    • 在对存储器单元进行的写入操作的指​​令的接收之后,数据输入缓冲器从非活动状态改变为活动状态。 输入缓冲器是具有例如基于SSTL的接口规格的差分输入缓冲器,其通过接通电源开关而使其通过电流流动并接收信号而进入激活状态,同时紧随着小的变化 小振幅信号。 由于只有当提供了对存储器单元的写操作指令时,输入缓冲器才进入活动状态,所以在提供指令之前预先使输入缓冲器无效,从而减少浪费的功耗。 在另一方面,通过在从写入命令发布到下一个命令发布的时间段内从主动状态变为非活动状态来降低功耗。
    • 47. 发明申请
    • SEMICONDUCTOR DEVICE
    • 半导体器件
    • US20100149883A1
    • 2010-06-17
    • US12710394
    • 2010-02-23
    • Binhaku TaruishiHiroki MiyashitaKen ShibataMasashi Horiguchi
    • Binhaku TaruishiHiroki MiyashitaKen ShibataMasashi Horiguchi
    • G11C7/10G11C8/18G11C7/00G11C7/02
    • G11C7/1084G11C7/1066G11C7/1078G11C7/1093G11C7/1096
    • In a semiconductor device having a data input buffer capable of inputting write data to each of memory units, the data input buffer is changed from an inactive state to an active state after the reception of instruction for a write operation effected on the memory unit. The data input buffer is a differential input buffer having interface specs based on SSTL, for example, which is brought to an active state by the turning on of a power switch to thereby cause a through current to flow and receives a signal therein while immediately following a small change in small-amplitude signal. Since the input buffer is brought to the active state only when the write operation's instruction for the memory unit is provided, the data input buffer is rendered inactive in advance, before the instruction for the write operation is provided, whereby wasteful power consumption is reduced. In another aspect, power consumption is reduced by changing from the active to the inactive state in a time period from a write command issuing to a next command issuing.
    • 在具有能够向每个存储单元输入写入数据的数据输入缓冲器的半导体器件中,在接收到对存储器单元进行的写入操作的指​​令之后,数据输入缓冲器从非活动状态改变为有效状态。 数据输入缓冲器是具有例如基于SSTL的接口规格的差分输入缓冲器,其通过接通电源开关而进入活动状态,从而使通过电流流过并在其中立即接收信号 小振幅信号的小变化。 由于只有在提供了写入操作对存储器单元的指令的情况下,输入缓冲器才进入活动状态,所以在提供写入操作的指​​令之前,预先使数据输入缓冲器无效,从而减少浪费的功耗。 在另一方面,通过在从写入命令发布到下一个命令发布的时间段内从主动状态变为非活动状态来降低功耗。