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    • 8. 发明授权
    • Pseudo 6T SRAM cell
    • 伪6T SRAM单元
    • US07671422B2
    • 2010-03-02
    • US11865950
    • 2007-10-02
    • Ping-Wei Wang
    • Ping-Wei Wang
    • H01L23/62
    • H01L27/1104G11C11/412H01L27/11Y10S257/903Y10S257/906
    • A pseudo 6T SRAM cell design comprising eight transistors is provided. An embodiment comprises a pair of cross-coupled inverters and a pair of pass-gate transistors electrically coupled to each inverter through the substrate. Each pass-gate transistor has a different beta ratio from the other transistor in its pair, and the smaller beta ratio in the pair acts as a “read” port while the larger beta ratio in the pair acts as a “write” port. Two pairs of bit lines are connected to the pass-gate transistors. A variety of word lines are connected to the pass-gate transistors. In one embodiment, a single word line is connected to all of the pass-gate transistors. In another embodiment, a pair of word lines is connected to the pass-gate transistors. In yet another embodiment, a different word line is connected to each pass-gate transistor.
    • 提供了包括八个晶体管的伪6T SRAM单元设计。 一个实施例包括一对交叉耦合的反相器和一对通过基板电耦合到每个反相器的通过栅极晶体管。 每个通栅晶体管与其对中的另一个晶体管具有不同的β比率,并且该对中较小的β比例用作“读取”端口,而该对中较大的β比例充当“写入”端口。 两对位线连接到通过栅极晶体管。 各种字线连接到通栅晶体管。 在一个实施例中,单个字线连接到所有的通过栅极晶体管。 在另一个实施例中,一对字线连接到通栅晶体管。 在另一个实施例中,不同的字线连接到每个通过栅极晶体管。