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    • 5. 发明授权
    • Semiconductor memory using dynamic ram cells
    • 半导体存储器使用动态RAM单元
    • US4943944A
    • 1990-07-24
    • US275501
    • 1988-11-23
    • Koji SakuiTsuneaki FuseFujio Masuoka
    • Koji SakuiTsuneaki FuseFujio Masuoka
    • G11C7/10G11C11/4091G11C11/4094G11C11/4096
    • G11C11/4091G11C11/4094G11C11/4096G11C7/1006G11C7/1051
    • Bit-line pairs and word lines are disposed perpendicular to one another and dRAM cells are placed at their intersections. A dummy cell is connected to each of the bit-line pairs. A bit-line sense amplifier and an equalizer are connected to one end of the bit-line pair. The other end of the bit-line pair is connected to a latch type memory cell via a first transfer gate. The latch type memory cell are further connected to input/output line pair via a second transfer gate controlled by a column select line. During a RAS active period in a read cycle a word line is selected so that data is read from a dRAM cell and the dummy cell connected to the selected word line onto the bit-line pairs. The bit-line sense amplifiers are activated so that the levels of the bit lines become determinate. The first transfer gates are subsequently turned on to transfer the data on the bit-line pairs to the latch type cells. After the memory cells are rewritten into, the selected word line is reset and the latch type memory cells are electrically disconnected from the bit-line pairs. The equalizers operate to precharge the bit-line pairs. When CAS is rendered active and a column is selected, a corresponging second transfer gate is turned on so that data in the latch type memory cell is read out onto the input/output line pairs.
    • 位线对和字线彼此垂直设置,并且dRAM单元被放置在它们的相交处。 虚拟单元连接到每个位线对。 位线读出放大器和均衡器连接到位线对的一端。 位线对的另一端通过第一传输门连接到锁存型存储单元。 闩锁型存储单元还经由由列选择线控制的第二传输门连接到输入/输出线对。 在读周期的RAS活动期间,选择字线,使得从dRAM单元读取数据,将连接到选定字线的虚拟单元读取到位线对上。 位线读出放大器被激活,使得位线的电平变得确定。 随后接通第一传输门,将位线对上的数据传送到锁存型单元。 在重写存储器单元之后,所选择的字线被复位,闩锁型存储单元与位线对电连接。 均衡器用于对位线对进行预充电。 当CAS被激活并选择列时,相应的第二传输门被导通,使得锁存型存储单元中的数据被读出到输入/输出线对上。
    • 8. 发明授权
    • Semiconductor memory device having a plurality of transfer gates and improved word line and column select timing for high speed write operations
    • 具有多个传输门的半导体存储器件和用于高速写入操作的改进的字线和列选择定时
    • US06198687B1
    • 2001-03-06
    • US08716884
    • 1996-09-20
    • Koji SakuiKazunori OhuchiFujio Masuoka
    • Koji SakuiKazunori OhuchiFujio Masuoka
    • G11C11407
    • G11C8/18
    • A semiconductor memory device which receives a row address strobe (RAS) signal and a column address strobe (CAS) signal from an external device. The device includes rewritable memory cells formed on a semiconductor substrate, a plurality of bit lines, a plurality of word lines, and a transfer gate coupled between the bit lines and input/output (I/O) lines and controlled by a column select line or signal. In one embodiment, a first transfer gate is connected between the bit lines and a second transfer gate, the second transfer gate connected between the first transfer gate and an input/output (I/O) line and controlled by a column select line (CSL). A third transfer gate may also by provided. The first transfer gate is driven in response to a clock signal which is enabled at substantially the same time as a word line of the plurality of word lines is selected during both read and write cycles. Thus, during a write cycle in which the CAS signal is enabled prior to the RAS signal, a selected CSL can be increased from a first voltage (VSS) to one of a second voltage (Vdd) and {fraction (3/2)} Vdd as soon as a column address is input.
    • 从外部设备接收行地址选通(RAS)信号和列地址选通(CAS)信号的半导体存储器件。 该器件包括形成在半导体衬底上的可重写存储单元,多个位线,多个字线和耦合在位线和输入/输出(I / O)线之间并由列选择线控制的传输栅极 或信号。 在一个实施例中,第一传输门连接在位线和第二传输门之间,第二传输门连接在第一传输门和输入/输出(I / O)线之间,并由列选择线(CSL )。 也可以通过提供第三传输门。 响应于在读取和写入周期期间选择多个字线的字线的基本上相同的时间使能的时钟信号来驱动第一传输门。 因此,在RAS信号之前的CAS信号被使能的写周期中,所选择的CSL可以从第一电压(VSS)增加到第二电压(Vdd)和{分数(3/2)}之一 一旦列地址被输入,就会Vdd。