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    • 72. 发明申请
    • MEMORY REFRESH SYSTEM AND OPERATING METHOD THEREOF
    • 存储器刷新系统及其操作方法
    • US20110110175A1
    • 2011-05-12
    • US12616910
    • 2009-11-12
    • Meng-Fan ChangChih-Wen Cheng
    • Meng-Fan ChangChih-Wen Cheng
    • G11C7/00
    • G11C11/406G11C11/40615G11C11/40626G11C2207/104G11C2211/4061
    • A memory refresh system includes a comparative detection circuit, a logic circuit, and a timing circuit. The comparative detection circuit detects a voltage of the storage capacitor of a memory cell of the memory and generates a corresponding digital code by comparing the voltage with a reference voltage. Each memory cell has a corresponding digital code. The combination of the digital codes of the memory cells forms a first state. After a specific period of time, the voltages of the storage capacitors of the memory cells are once detected by the comparative detection circuit, and corresponding digital codes are generated and combined to form a second state. The logic circuit compares the first state and the second state to determining whether or not to change the refresh period of a refresh period detecting process. The timing circuit changes the refresh period according to the determination result of the logic circuit.
    • 存储器刷新系统包括比较检测电路,逻辑电路和定时电路。 比较检测电路检测存储器的存储单元的存储电容器的电压,并通过将电压与参考电压进行比较来产生相应的数字代码。 每个存储单元具有相应的数字代码。 存储器单元的数字代码的组合形成第一状态。 经过一定时间后,由比较检测电路一次检测存储单元的存储电容器的电压,生成并组合相应的数字代码,形成第二状态。 逻辑电路比较第一状态和第二状态,以确定是否改变刷新周期检测处理的刷新周期。 定时电路根据逻辑电路的判定结果改变刷新周期。
    • 73. 发明授权
    • Temperature detector in an integrated circuit
    • 集成电路中的温度检测器
    • US07929366B2
    • 2011-04-19
    • US12619157
    • 2009-11-16
    • Chung Zen Chen
    • Chung Zen Chen
    • G11C7/04
    • G11C7/04G11C11/406G11C11/40626G11C11/4074G11C2211/4068
    • A temperature detector in an integrated circuit comprises a temperature-dependent voltage generator, a ring oscillator, a timer and a clock-driven recorder. The temperature-dependent voltage generator is configured to generate at least one temperature-dependent voltage. The ring oscillator is configured to generate a clock signal, which is affected by one of the at least one temperature-dependent voltage. The timer is configured to generate a time-out signal, which is affected by one of the temperature-dependent voltage. The clock-driven recorder has a clock input terminal in response to the clock signal and time-out signal.
    • 集成电路中的温度检测器包括温度依赖性电压发生器,环形振荡器,定时器和时钟驱动记录器。 温度依赖性电压发生器被配置为产生至少一个温度依赖电压。 环形振荡器被配置为产生受至少一个温度相关电压之一影响的时钟信号。 定时器被配置为产生受温度依赖电压之一影响的超时信号。 时钟驱动记录器具有响应于时钟信号和超时信号的时钟输入端子。
    • 76. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US07813205B2
    • 2010-10-12
    • US12212066
    • 2008-09-17
    • Atsumasa Sako
    • Atsumasa Sako
    • G11C7/00G11C7/04G11C11/34
    • G11C11/40626G11C11/406G11C2211/4061G11C2211/4067
    • A semiconductor memory device is provided for minutely changing a refresh interval according to a detected temperature and thereby lowering its power consumption. A temperature detector detects a temperature of a chip and outputs the corresponding temperature signal. A reference temperature signal output unit outputs the corresponding reference temperature signal with each of different reference temperatures to be compared with the chip temperature according to a selection signal. A temperature comparison unit compares the chip temperature with the reference temperature through the temperature signal and the reference temperature signal. A selection signal output unit outputs the selection signal according to the compared result of the temperature comparison unit. A refresh interval control unit changes the refresh interval according to the compared result of the temperature comparison unit.
    • 提供一种半导体存储器件,用于根据检测到的温度微小地改变刷新间隔,从而降低其功耗。 温度检测器检测芯片的温度并输出相应的温度信号。 参考温度信号输出单元根据选择信号,输出具有不同基准温度的相应参考温度信号以与芯片温度进行比较。 温度比较单元通过温度信号和参考温度信号将芯片温度与参考温度进行比较。 选择信号输出单元根据温度比较单元的比较结果来输出选择信号。 刷新间隔控制单元根据温度比较单元的比较结果改变刷新间隔。
    • 77. 发明申请
    • REFRESH CONTROL CIRCUIT AND METHOD FOR SEMICONDUCTOR MEMORY APPARATUS
    • 半导体存储器件的刷新控制电路和方法
    • US20100232246A1
    • 2010-09-16
    • US12651043
    • 2009-12-31
    • Won Kyung CHUNG
    • Won Kyung CHUNG
    • G11C7/00
    • G11C7/04G11C11/406G11C11/40626
    • A refresh control circuit of a semiconductor memory apparatus includes: a variable oscillator configured to generate a room-temperature oscillation signal and a limit-temperature oscillation signal in response to a temperature state signal; a cycle selector configured to selectively output the room temperature oscillation signal and the limit-temperature oscillation signal as a variable oscillation signal in response to the temperature state signal; a refresh signal generator configured to generate a refresh signal in response to the variable oscillation signal and a fixed oscillation signal; and a temperature state detector configured to generate the temperature state signal by detecting current temperature in response to the room-temperature oscillation signal and the fixed oscillation signal.
    • 半导体存储装置的刷新控制电路包括:可变振荡器,被配置为响应于温度状态信号产生室温振荡信号和极限温度振荡信号; 循环选择器,其被配置为响应于所述温度状态信号选择性地输出所述室温振荡信号和所述极限温度振荡信号作为可变振荡信号; 刷新信号发生器,被配置为响应于所述可变振荡信号和固定振荡信号产生刷新信号; 以及温度状态检测器,其被配置为通过响应于室温振荡信号和固定振荡信号检测当前温度来产生温度状态信号。
    • 79. 发明申请
    • DYNAMIC RANDOM ACCESS MEMORY DEVICE AND METHOD FOR SELF-REFRESHING MEMORY CELLS WITH TEMPERATURE COMPENSATED SELF-REFRESH
    • 动态随机访问存储器件及其自动补偿存储器单元与温度补偿自刷新的方法
    • US20100142304A1
    • 2010-06-10
    • US12705040
    • 2010-02-12
    • Hong Beom PYEON
    • Hong Beom PYEON
    • G11C7/00G11C8/08
    • G11C11/406G11C7/04G11C11/40611G11C11/40615G11C11/40626G11C2211/4061
    • A dynamic random access memory (DRAM) device has an array of DRAM cells of rows by columns. Each DRAM cell of the array is coupled with a wordline of a corresponding row and a bitline of a corresponding column. An entry into and an exit from the self-refresh mode are detected by a mode detector and a self-refresh mode signal is provided. An oscillation circuit generates in response to the self-refresh mode signal generates a basic time period. A first frequency divider/time period multiplier changes the basic time period in accordance with a process variation factor relating to the DRAM device. A second frequency divider/time period multiplier further changes the changed time period in accordance with a temperature change factor relating to the DRAM device. In the self-refresh mode, data stored in the DRAM cells is refreshed. In accordance with the two factors, the DRAM devices perform and achieve reliable self-refresh for variable DRAM cell retention time.
    • 动态随机存取存储器(DRAM)器件具有逐列的DRAM单元阵列。 阵列的每个DRAM单元与相应列的相应行和位线的字线相连。 通过模式检测器检测进入和退出自刷新模式,并提供自刷新模式信号。 响应于自刷新模式信号产生的振荡电路产生基本时间段。 第一分频器/时间周期乘法器根据与DRAM器件有关的过程变化因素来改变基本时间周期。 第二分频器/时间周期乘法器还根据与DRAM器件有关的温度变化因素来改变改变的时间周期。 在自刷新模式下,存储在DRAM单元中的数据被刷新。 根据这两个因素,DRAM器件执行并实现可变DRAM单元保留时间的可靠的自刷新。