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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。
    • 4. 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。
    • 6. 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。
    • 9. 发明授权
    • Semiconductor integrated circuit and semiconductor integrated circuit system having serially interconnectable data buses
    • 具有串行可互连数据总线的半导体集成电路和半导体集成电路系统
    • US06297675B1
    • 2001-10-02
    • US09478530
    • 2000-01-06
    • Hironori AkamatsuYutaka TeradaTakashi HirataYukio ArimaSatoshi TakahashiTadahiro YoshidaYoshihide KomatsuHiroyuki Yamauchi
    • Hironori AkamatsuYutaka TeradaTakashi HirataYukio ArimaSatoshi TakahashiTadahiro YoshidaYoshihide KomatsuHiroyuki Yamauchi
    • H03B100
    • H03K19/018514Y10T307/549
    • A data line pair and a strobe line pair are provided between first and second chips to exchange data therebetween. The first chip includes an output circuit and a controller for controlling the output circuit. The second chip includes an input circuit. For example, the output circuit supplies a direct current from a power supply to one of the data lines. Then, the input circuit feeds back the received current to the output circuit through a pair of terminal resistors and the other data line. Subsequently, the output circuit supplies the fed back direct current to one of the strobe lines. In response, the input circuit feeds back the received current again to the output circuit through another pair of terminal resistors and the other strobe line. And then the fed back current is drained to the ground. Thus, compared to driving the data and strobe line pairs separately with the same amount of current supplied, the current dissipation can be halved. In this manner, the present invention is applicable to reduction of current dissipation when data should be transmitted at high speeds through multiple data bus pairs that are driven with a current supplied.
    • 在第一和第二芯片之间提供数据线对和选通线对,以在它们之间交换数据。 第一芯片包括输出电路和用于控制输出电路的控制器。 第二芯片包括输入电路。 例如,输出电路将电流从电源提供给数据线之一。 然后,输入电路通过一对端子电阻和另一条数据线将接收的电流反馈到输出电路。 随后,输出电路将反馈的直流电流提供给选通线之一。 作为响应,输入电路通过另一对端子电阻器和另一个选通线路将接收到的电流再次反馈到输出电路。 然后将反馈电流排到地面。 因此,与以相同的电流量驱动数据和选通线对相比,电流消耗可以减半。 以这种方式,本发明可应用于当通过以所提供的电流驱动的多个数据总线对以高速传输数据时,减少电流消耗。