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    • 1. 发明授权
    • Semiconductor integrated circuit with voltage-detecting circuit and signal transmitting and receiving system
    • 具有电压检测电路和信号发射和接收系统的半导体集成电路
    • US06944003B2
    • 2005-09-13
    • US10365527
    • 2003-02-13
    • Hirokazu SugimotoTakashi HirataHironori AkamatsuToru IwataSatoshi Takahashi
    • Hirokazu SugimotoTakashi HirataHironori AkamatsuToru IwataSatoshi Takahashi
    • G01R31/28H01L21/66H02H9/04H02H3/24
    • H02H9/046
    • A first semiconductor integrated circuit is connected to a second semiconductor integrated circuit with a cable. In the first semiconductor integrated circuit, when a power supply voltage becomes less than a set voltage detection level, a voltage-detecting circuit outputs a voltage-detected signal to lower the voltage of the cable and to stop the operation. The second semiconductor integrated circuit detects the decrease in the voltage of the cable to recognize the halt of the operation of the first semiconductor integrated circuit. In the first semiconductor integrated circuit thus configured, in testing the operation under low-voltage conditions in which the power supply voltage is less than the set voltage detection level, the voltage-detecting circuit receives a control signal from an external terminal to stop the operation forcibly. Consequently, even when the power supply voltage is made lower than the set voltage-detecting level, the first semiconductor integrated circuit properly operates until the power supply voltage reaches a predetermined lower limit of operating voltage. Thus, evaluation of operation is possible under low-voltage conditions.
    • 第一半导体集成电路通过电缆连接到第二半导体集成电路。 在第一半导体集成电路中,当电源电压变得小于设定电压检测电平时,电压检测电路输出电压检测信号来降低电缆的电压并停止工作。 第二半导体集成电路检测电缆的电压的降低以识别第一半导体集成电路的操作停止。 在这样配置的第一半导体集成电路中,在电源电压小于设定电压检测电平的低电压条件下进行测试时,电压检测电路从外部端子接收控制信号,停止动作 强制。 因此,即使电源电压低于设定电压检测电平,第一半导体集成电路也可以正常工作,直到电源电压达到预定的工作电压下限。 因此,在低电压条件下可以进行运行评估。
    • 3. 发明授权
    • Circuit for controlling leakage current in large scale integrated
circuits
    • 用于控制大规模集成电路中的漏电流的电路
    • US6140864A
    • 2000-10-31
    • US927061
    • 1997-09-10
    • Takashi HirataToru IwataHironori Akamatsu
    • Takashi HirataToru IwataHironori Akamatsu
    • G06F1/26G05F3/02
    • G06F1/26
    • In an LSI circuit, respective voltages on power-source lines connected to the respective sources of transistors which are turned OFF in a circuit block in the standby state are controlled by a power-source-voltage control circuit to vary in response to variations in the threshold voltages of the transistors. Consequently, the differential voltage (Vgs-Vt) between the gate-to-source voltage Vgs of each of the transistors and the threshold voltage Vt thereof is held constant at a given value, so that an OFF-state leakage current flowing through the transistor in the circuit block in the standby state is reduced and held constant at a given value. What results is a reduction in the power consumption of the circuit block in the standby state.
    • 在LSI电路中,通过电源电压控制电路来控制在待机状态下在电路块中断开的与晶体管的各个源连接的电源线上的各个电压,以响应于 晶体管的阈值电压。 因此,每个晶体管的栅 - 源电压Vgs与其阈值电压Vt之间的差分电压(Vgs-Vt)保持恒定在给定值,使得流过晶体管的截止状态漏电流 处于待机状态的电路块减小并保持恒定在给定值。 在待机状态下电路块的功耗降低是什么结果。
    • 6. 发明授权
    • Memory access buffer and reordering apparatus using priorities
    • 使用优先级的存储器访问缓冲器和重新排序装置
    • US6145065A
    • 2000-11-07
    • US67899
    • 1998-04-29
    • Satoshi TakahashiHiroyuki YamauchiHironori AkamatsuKeiichi KusumotoToru IwataYutaka TeradaTakashi Hirata
    • Satoshi TakahashiHiroyuki YamauchiHironori AkamatsuKeiichi KusumotoToru IwataYutaka TeradaTakashi Hirata
    • G06F13/16G06F12/02
    • G06F13/1631
    • A current problem is that when a DRAM is to be accessed through a data bus, the DRAM is accessed independently of a bank, a row address, etc., and therefore, is inefficient. To solve this problem, an address bus and a data bus are connected to a main memory part independently of each other, a temporary memory part for holding a plurality of addresses in advance is disposed on the address bus side and holds addresses for every access to the main memory part regardless of transfer of data, thereby pipelining address inputting cycles. Further, for the purpose of an effective operation of the main memory part, using the addresses which are held, the addresses are rearranged in such a manner that addresses with the same row addresses become continuous to each other, or when there are not addresses with the same row addresses, addresses different banks from each other become continuous to each other, and the memory is thereafter accessed. This reduces the number of precharges, shortens a standby period which is necessary for a precharge, and realizes accessing while reducing a wasteful use of time.
    • 目前的问题在于,当通过数据总线访问DRAM时,独立于存储体,行地址等访问DRAM,因此是低效的。 为了解决这个问题,地址总线和数据总线彼此独立地连接到主存储器部分,预先存储多个地址的临时存储器部分设置在地址总线侧,并且保存地址以进行每次访问 主存储部分不管数据传输,从而流水线地址输入周期。 此外,为了主存储器部分的有效操作,使用所保存的地址,地址被重新排列,使得具有相同行地址的地址彼此连续,或者当没有地址与 相同的行地址,彼此不同的存储体彼此变得连续,并且此后访问存储器。 这减少了预充电次数,缩短了预充电所需的待机时间,并实现了访问,同时减少了浪费时间的使用。
    • 8. 发明授权
    • Static random access memory capable of reducing stendly power
consumption and off-leakage current
    • 静态随机存取存储器能够降低待机功耗和漏电流
    • US5764566A
    • 1998-06-09
    • US893682
    • 1997-07-11
    • Hironori AkamatsuToru IwataHisakazu Kotani
    • Hironori AkamatsuToru IwataHisakazu Kotani
    • G11C11/412G11C11/417G11C11/413
    • G11C11/412G11C11/417
    • When a memory chip is in a standby mode, a ground power supply line of a flip-flop forming a memory cell is intermittently placed in the floating state. A switching NMOS transistor is connected between the ground power supply line and a power supply VSS. The gate of the NMOS transistor is controlled by an activation signal. When entering the floating state, the ground power supply line is charged due to an off-leakage current flowing in the transistor of the memory cell. As a result, the voltage of the ground power supply line is increased from the voltage of the power supply VSS. Accordingly, the off-leakage current of the memory cell is reduced, whereby the standby-time power consumption of the memory chip is decreased. When the voltage of the ground power supply line keeps going up, it becomes impossible to read data held in the memory cell in a short time, resulting in the data being lost. In order to prevent the loss of the data, the switching NMOS transistor is made to intermittently turn on.
    • 当存储器芯片处于待机模式时,形成存储单元的触发器的接地电源线被间歇地置于浮置状态。 开关NMOS晶体管连接在接地电源线和电源VSS之间。 NMOS晶体管的栅极由激活信号控制。 当进入浮动状态时,由于在存储单元的晶体管中流过的漏电流导致接地电源线被充电。 结果,接地电源线的电压从电源VSS的电压增加。 因此,存储单元的泄漏电流减小,从而存储芯片的待机时功耗降低。 当接地电源线的电压持续上升时,不可能在短时间内读取保存在存储单元中的数据,导致数据丢失。 为了防止数据丢失,使开关式NMOS晶体管间歇地导通。
    • 10. 发明授权
    • Clock generation circuit and semiconductor integrated circuit
    • 时钟发生电路和半导体集成电路
    • US06191632B1
    • 2001-02-20
    • US09359727
    • 1999-07-23
    • Toru IwataHironori Akamatsu
    • Toru IwataHironori Akamatsu
    • H03K300
    • H03K5/153G06F1/10H03K5/133
    • A clock generation circuit comprises a clock wiring having opposed first and second ends, through which a clock is transmitted from the first end to the second end, and a plurality of clock phase adjustment circuits for generating internal clocks in accordance with the clock supplied from the clock wiring. Each of the clock phase adjustment circuits comprises a first-end side terminal and a second-end side terminal which are connected to a first-end side point and a second-end side point of the circuit, respectively, the points being positioned on both sides of a reference point of the clock wiring; a delay line for delaying a clock supplied from one of the terminals and outputting an internal clock; and a delay control circuit for performing feedback control on a delay of the clock in the delay means in accordance with the phase of the clock supplied from the other terminal so that the phase of the internal clock matches the phase of the clock at the reference point of the cock wiring. Therefore, regardless of the distances from the first end (clock input end) of the clock wiring to the respective clock phase adjustment circuits, internal clocks of the same phase are output from the clock phase adjustment circuits.
    • 时钟发生电路包括具有相对的第一和第二端的时钟布线,通过该时钟布线从第一端发送到第二端,以及多个时钟相位调整电路,用于根据从第一端提供的时钟产生内部时钟 时钟接线。 每个时钟相位调整电路包括分别连接到电路的第一端侧点和第二端侧点的第一端侧端子和第二端侧端子,所述点位于两者上 侧面参考点的时钟布线; 用于延迟从一个终端提供的时钟并输出内部时钟的延迟线; 以及延迟控制电路,用于根据从另一个终端提供的时钟的相位对延迟装置中的时钟的延迟执行反馈控制,使得内部时钟的相位与参考点的时钟的相位匹配 的公鸡接线。 因此,不管从时钟线的第一端(时钟输入端)到各时钟相位调整电路的距离,从时钟相位调整电路输出同相的内部时钟。