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    • 86. 发明授权
    • Read circuit and method for nonvolatile memory cells with an equalizing
structure
    • 具有均衡结构的非易失性存储单元的读取电路和方法
    • US5886925A
    • 1999-03-23
    • US877922
    • 1997-06-18
    • Giovanni CampardoRino MicheloniMarco Maccarrone
    • Giovanni CampardoRino MicheloniMarco Maccarrone
    • G11C16/28G11C16/06
    • G11C16/28
    • The read circuit presents a current mirror circuit including a first and second load transistor interposed between the supply line and a respective first and second output node. The first output node is connected to a cell to be read, the second output node is connected to a generating stage generating a reference current having a predetermined characteristic, and the size of the second load transistor is N times greater than the first load transistor. To permit rapid cell reading even in the presence of low supply voltage and with no initial uncertainty, an equalizing circuit presents a current balancing branch connected between the first output node and ground for generating an equalizing current presenting a ratio of 1/N with the reference current to balance the circuit before commencing the reading.
    • 读取电路提供电流镜电路,其包括插入在电源线和相应的第一和第二输出节点之间的第一和第二负载晶体管。 第一输出节点连接到要读取的单元,第二输出节点连接到产生具有预定特性的参考电流的发生级,并且第二负载晶体管的尺寸大于第一负载晶体管的N倍。 为了即使在低电源电压并且没有初始不确定性的情况下也允许快速电池读取,均衡电路提供连接在第一输出节点和地之间的电流平衡支路,用于产生与参考值1 / N的比率的均衡电流 电流在开始读数之前平衡电路。
    • 89. 发明授权
    • Circuit and method for retrieving data stored in semiconductor memory cells
    • 用于检索存储在半导体存储单元中的数据的电路和方法
    • US07889586B2
    • 2011-02-15
    • US12248843
    • 2008-10-09
    • Luca CrippaGiancarlo RagoneMiriam SangalliRino Micheloni
    • Luca CrippaGiancarlo RagoneMiriam SangalliRino Micheloni
    • G11C7/04
    • G11C11/5642G11C7/04G11C16/30
    • A circuit comprises at least one memory cell adapted to store data in terms of values of an electrical characteristic thereof, which exhibits a variability with temperature according to a first variation law; a voltage generator is provided for generating a voltage to be supplied to the at least one memory cell for retrieving the data stored therein, the voltage generator including first means adapted to cause the generated voltage take a value in a set of target values including at least one target value, corresponding to an operation to be performed on the memory cell. The voltage generator comprises second means for causing the value taken by the generated voltage vary with temperature according to a prescribed second variation law exploiting a compensation circuit element having said electrical characteristic.
    • 电路包括至少一个存储单元,适于根据其电特性的值存储数据,其根据第一变化规律表现出与温度的变化性; 提供电压发生器,用于产生要提供给所述至少一个存储单元的电压以检索存储在其中的数据,所述电压发生器包括适于使所产生的电压取值至少包括至少一组目标值的值的第一装置 一个目标值,对应于要在存储器单元上执行的操作。 电压发生器包括第二装置,用于使得所产生的电压所采取的值根据规定的第二变化规律随温度变化,利用具有所述电特性的补偿电路元件。