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    • 4. 发明公开
    • 가상 접지를 제어하여 CAMRAM 뱅크를 재분할하는회로 및 방법
    • 通过控制虚拟地面来分散CAMRAM银行的电路和方法
    • KR1020080068896A
    • 2008-07-24
    • KR1020087012868
    • 2006-10-30
    • 퀄컴 인코포레이티드
    • 판,마이클,타이티안차이,치아밍브리짓,제프리,토드피셔,제프리,헤르베르트
    • G11C15/04
    • G11C15/00G11C8/12G11C15/04
    • A CAM bank is functionally divided into two or more sub-banks, without replicating CAM driver circuits, by disabling all match line discharge circuits in the bank, and selectively enabling the discharge circuits in entries comprising sub-banks. At least one selectively actuated switching circuit is interposed between the virtual ground node of each discharging comparator in the discharge circuit of a sub-bank and circuit ground. When the switching circuit is in a non-conductive state, the virtual ground node is maintained at a voltage level sufficiently above circuit ground to preclude discharging a connected match line within the CAM access time. When the switching circuit is placed in a conductive state, the virtual ground node is pulled to circuit ground and the connected match line may be discharged by a miscompare. Control signals, which may be decoded from address bits, are distributed to the switching circuits to define the CAM sub-banks.
    • CAM组在功能上划分为两个或更多个子行,不复制CAM驱动电路,禁止该组中的所有匹配线放电电路,并且选择性地使得放电电路在包含子行的条目中使能。 至少一个选择性致动的切换电路插入在子组的放电电路中的每个放电比较器的虚拟接地节点和电路接地之间。 当开关电路处于非导通状态时,虚拟接地节点保持在足够高于电路接地的电压电平,以防止在CAM访问时间内放电连接的匹配线。 当开关电路处于导通状态时,虚拟接地节点被拉到电路接地,并且连接的匹配线可能被误比较地放电。 可以从地址位解码的控制信号被分配给切换电路以定义CAM子库。
    • 5. 发明授权
    • SRAM(STATIC RANDOM ACCESS MEMORY) 리셋 동작들 동안 SRAM 비트셀들을 전압 또는 전류 바이어싱하기 위한 회로들, 및 관련된 시스템들 및 방법들
    • 用于电压或电流偏移的静态随机访问存储器SRAM电路SRAM复位操作期间的静态随机访问存储器SRAM位元及相关系统和方法
    • KR101715693B1
    • 2017-03-13
    • KR1020167004951
    • 2014-07-29
    • 퀄컴 인코포레이티드
    • 차이,치아밍마우리야,사텐드라,쿠마르
    • G11C11/412G11C11/417G11C11/419G11C7/20
    • G11C11/412G11C7/20G11C11/417G11C11/419
    • SRAM 리셋동작들동안정적랜덤액세스메모리(SRAM) 비트셀들을전압또는전류바이어싱하기위한회로가개시된다. 관련된시스템들및 방법들이또한개시된다. 단일리셋동작에서복수의 SRAM 비트셀들을리셋하기위해, 바이어싱회로가제공하고복수의 SRAM 비트셀들에커플링된다. SRAM 비트셀들에제공되는전력이 SRAM 비트셀들의동작전력레벨미만의축소된전력레벨로축소된이후, 바이어싱회로는리셋동작동안 RAM의비트셀들에전압또는전류바이어스를인가하도록구성된다. SRAM 비트셀들에대한전력이동작전력레벨로복원될때 바이어스가인가되며, 이에따라 SRAM 비트셀들을원하는상태로강제한다. 이러한방식으로, SRAM 비트셀들은리셋회로로부터증가된구동강도에대한필요성없이그리고특수 SRAM 비트셀들을제공할필요없이단일리셋동작에서리셋될수 있다.
    • 公开了在SRAM复位操作期间用于电压或电流偏置静态随机存取存储器(SRAM)位单元的电路。 还公开了相关系统和方法。 为了在单个复位操作中复位多个SRAM位单元,提供偏置电路并耦合到多个SRAM位单元。 偏置电路被配置为在复位操作期间向SRAM位单元施加电压或电流偏置,其中提供给SRAM位单元的功率被折叠到低于操作功率电平的压缩功率电平。 当SRAM位单元的功率恢复到工作功率电平时,施加偏压,从而迫使SRAM位单元进入所需状态。 以这种方式,可以在单个复位操作中复位SRAM位单元,而不需要来自复位电路的增加的驱动强度,而不需要提供专门的SRAM位单元。
    • 9. 发明公开
    • 콘텐츠 어드레스가능한 메모리에서의 전력 소모를 감소시키기 위한 방법 및 장치
    • 用于减少内部可寻址存储器中的功耗的方法和装置
    • KR1020090038484A
    • 2009-04-20
    • KR1020097004515
    • 2007-08-01
    • 퀄컴 인코포레이티드
    • 차이,치아밍피셔,제프리,허버트판,미첼,타이탄흐
    • G11C15/00G11C7/10
    • G11C15/04G11C5/06G11C7/10
    • Power consumption in a multi-level hierarchical Content Addressable Memory (CAM) circuit is reduced without adversely impacting performance. According to one embodiment of a multi-level hierarchical CAM circuit, the CAM circuit comprises a plurality of lower-level match lines, a plurality of higher-level match lines and match line restoration circuitry. The lower-level match lines are configured to be restored to a pre-evaluation state during a pre-evaluation period. The higher-level match lines are configured to capture an evaluation state of respective groups of one or more of the lower-level match lines during an evaluation period and to be restored to a pre-evaluation state during the pre-evaluation period. The match line restoration circuitry is configured to prevent at least one of the lower-level match lines from being restored to the pre-evaluation state responsive to corresponding enable information, e.g., one or more bits indicating whether match line search results are to be utilized.
    • 降低了多层分级内容可寻址存储器(CAM)电路中的功耗,而不会对性能造成不利影响。 根据多级分级CAM电路的一个实施例,CAM电路包括多个下级匹配线,多个较高级别匹配线和匹配线恢复电路。 低级别匹配行被配置为在预评估期间恢复到预评估状态。 更高级别的匹配行被配置为在评估期间捕获一个或多个下级匹配行的各个组的评估状态,并且在预评估周期期间恢复到预评估状态。 匹配线恢复电路被配置为响应于相应的使能信息来防止下级匹配线中的至少一个被恢复到预评估状态,例如,指示是否要利用匹配线搜索结果的一个或多个比特 。