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    • 1. 发明授权
    • Non-volatile memory with temperature-compensated data read
    • 具有温度补偿数据读取的非易失性存储器
    • US06560152B1
    • 2003-05-06
    • US10053171
    • 2001-11-02
    • Raul-Adrian Cernea
    • Raul-Adrian Cernea
    • G11C704
    • G11C7/04G11C7/12G11C16/26G11C16/28
    • A novel non-volatile memory is disclosed. The non-volatile memory includes an array of data storage cells that individually include a storage element such as a floating gate, a control gate and first and second source/drain terminals. A current source provides a current to the first source/drain terminal of the data storage element. A node is electrically connected to the second source/drain terminal of the data storage element. A bias circuit provides a bias voltage to the node. The bias voltage varies with temperature in a manner approximately inverse to the thermal variation of the threshold voltage of the data storage element. A control gate voltage circuit provides a voltage level to the control gate of the data storage cell.
    • 公开了一种新颖的非易失性存储器。 非易失性存储器包括单独包括诸如浮动栅极,控制栅极和第一和第二源极/漏极端子的存储元件的数据存储单元的阵列。 电流源向数据存储元件的第一源极/漏极端子提供电流。 节点电连接到数据存储元件的第二源极/漏极端子。 偏置电路为节点提供偏置电压。 偏置电压以与数据存储元件的阈值电压的热变化大致相反的方式随温度变化。 控制栅极电压电路向数据存储单元的控制栅极提供电压电平。
    • 3. 发明授权
    • Semiconductor device
    • 半导体器件
    • US06717878B2
    • 2004-04-06
    • US10263088
    • 2002-10-03
    • Tsukasa HaguraMasaki Tsukude
    • Tsukasa HaguraMasaki Tsukude
    • G11C704
    • G11C7/04G11C11/406
    • A first reference current having a first temperature characteristic is generated by a first reference current generating circuit (1) while a second reference current having a second temperature characteristic is generated by a second reference current generating circuit (2). A temperature characteristic multiplying circuit (3) amplifies the first reference current by using a current difference between the first and second reference currents to generate a reference current having a third temperature characteristic higher than the first temperature characteristic, so that a ring oscillator (X) determines a refresh period on the basis of the reference current.
    • 具有第一温度特性的第一参考电流由第一参考电流产生电路(1)产生,而具有第二温度特性的第二参考电流由第二参考电流产生电路(2)产生。 温度特性乘法电路(3)通过使用第一和第二参考电流之间的电流差放大第一参考电流,以产生具有高于第一温度特性的第三温度特性的参考电流,使得环形振荡器(X) 基于参考电流确定刷新周期。
    • 5. 发明授权
    • Temperature compensated T-RAM memory device and method
    • 温度补偿T-RAM存储器件及方法
    • US06781907B2
    • 2004-08-24
    • US10165665
    • 2002-06-06
    • Ken W. Marr
    • Ken W. Marr
    • G11C704
    • G11C11/39
    • A T-RAM memory cell includes a temperature compensation device to adjust the gate-to-source voltage of an access transistor for the memory cell as a function of temperature so that the sub-threshold current of the transistor is insensitive to temperature variations. As a result, the sub-threshold current can be maintained slightly above the holding current of a thyristor used in the memory cell despite substantial temperature variations. In one embodiment, the temperature compensation device includes a current source directing a fixed current through a diode-connected transistor of the type used as the memory cell access transistor. Temperature induced changes in a reference voltage generated at the junction between the current source and the transistor therefore match the temperature induced changed in the sub-threshold current of the access transistor. As a result, the sub-threshold current of the access transistor can be made insensitive to temperature variations by applying the reference voltage to the gate or source of the access transistor.
    • T-RAM存储单元包括温度补偿装置,用于调节作为温度的函数的用于存储器单元的存取晶体管的栅极 - 源极电压,使得晶体管的次级阈值电流对温度变化不敏感。 因此,尽管存在相当大的温度变化,但是亚阈值电流可以保持略高于在存储器单元中使用的晶闸管的保持电流。 在一个实施例中,温度补偿装置包括电流源,其引导固定电流通过用作存储单元存取晶体管的类型的二极管连接的晶体管。 因此,在电流源和晶体管之间的结处产生的参考电压的温度感应变化使匹配在存取晶体管的次级阈值电流中变化的温度变化。 结果,通过将参考电压施加到存取晶体管的栅极或源极,可以使存取晶体管的亚阈值电流对温度变化不敏感。
    • 8. 发明授权
    • Method of controlling the conduction of the access transistors of a load less, four transistor memory cell
    • 控制负载较小的四晶体管存储单元的存取晶体管的导通的方法
    • US06388933B2
    • 2002-05-14
    • US09732535
    • 2000-12-08
    • Ken W. Marr
    • Ken W. Marr
    • G11C704
    • G11C11/418
    • The present invention is a current-mirror-based bias generator for a load less four transistor SRAM as well as associated methods of controlling or modifying the current conducted by the access transistors of such an SRAM. The present invention may be thought of as an adjustable temperature coefficient, bias generator that references, via a current mirror, a reference bank of SRAM cells. The bank of reference cells provides an indication of the necessary conduction characteristics (e.g., gate to source voltage) of the access transistors under various conditions. By applying a bias voltage to the word line the desired current is sourced from the digit line. The bank of reference SRAM cells inherently compensates for process variations. The adjustable temperature coefficient bias generator allows the current sourced by the digit lines to vary greatly as a result of temperature variations. Thus, the present invention compensates for both process variations and temperature variations.
    • 本发明是一种用于负载少于四个晶体管SRAM的基于电流镜的偏置发生器,以及控制或修改由这种SRAM的存取晶体管传导的电流的相关方法。 本发明可以被认为是可调温度系数,偏置发生器,其通过电流镜参考SRAM单元的参考组。 参考单元组在各种条件下提供存取晶体管所必需的导通特性(例如,栅 - 源电压)的指示。 通过对字线施加偏置电压,所需电流来自数字线。 参考库SRAM单元固有地补偿了工艺变化。 可调节温度系数偏置发生器允许由数字线引起的电流由于温度变化而极大地变化。 因此,本发明补偿了工艺变化和温度变化。