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    • 5. 发明授权
    • Bit line voltage bias for low power memory design
    • 用于低功耗存储器设计的位线电压偏置
    • US08675439B2
    • 2014-03-18
    • US13271353
    • 2011-10-12
    • Hong-Chen ChengJung-Ping YangChiting ChengCheng-Hung LeeSang H. DongHung-Jen Liao
    • Hong-Chen ChengJung-Ping YangChiting ChengCheng-Hung LeeSang H. DongHung-Jen Liao
    • G11C5/14
    • G11C7/12G11C11/419
    • In a digital memory with an array of bit cells coupled to word lines and bit lines, each bit cell having cross coupled inverters isolated from bit lines by passing gate transistors until addressed, some or all of the bit cells are switchable between a sleep mode and a standby mode in response to a control signal. A bit line bias circuit controls the voltage at which the bit lines are caused to float when in the sleep mode. A pull-up transistor for each bit line BL or BLB in a complementary pair has a conductive channel coupled to a positive supply voltage and a gate coupled to the other bit line in the pair, BLB or BL, respectively. A connecting transistor also can be coupled between the bit lines of the complementary pair, bringing the floating bit lines to the supply voltage less a difference voltage ΔV.
    • 在具有耦合到字线和位线的位单元阵列的数字存储器中,每个位单元具有通过将栅极晶体管直接寻址而与位线隔离的交叉耦合的反相器,部分或全部位单元可在睡眠模式和 响应于控制信号的待机模式。 位线偏置电路控制在处于睡眠模式时使位线浮动的电压。 用于互补对中的每个位线BL或BLB的上拉晶体管具有耦合到正电源电压的导电沟道和耦合到该对BLB或BL中的另一位线的栅极。 连接晶体管也可以耦合在互补对的位线之间,使浮置位线降低到差值ΔVV的电源电压。