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    • 5. 发明授权
    • Complementary depletion switch body stack off-chip driver
    • 互补耗尽开关体堆栈片外驱动
    • US06177818B1
    • 2001-01-23
    • US09303508
    • 1999-04-30
    • Claude L. BertinAnthony R. BonaccioHoward L. KalterThomas M. MaffittJack A. MandelmanWilliam R. Tonti
    • Claude L. BertinAnthony R. BonaccioHoward L. KalterThomas M. MaffittJack A. MandelmanWilliam R. Tonti
    • H03B2100
    • H03K19/09482H03K19/00361H03K19/018521
    • An off-chip driver circuit including an enhancement PFET, a depletion PFET, a depletion NFET and an enhancement NFET connected in series. The large enhancement PFET and large enhancement NFET turn off the OCD in tri-state and to turn off the unused half of the OCD to prevent overlap current when driving a ‘0’ or a ‘1’. A first gate signal is applied to the gate of the enhancement PFET and a second gate signal is applied to the enhancement NFET. A fixed voltage is connected to the gate of the depletion NFET and ground to gate of the depletion PFET. An output signal is obtained from a node between the depletion PFET and depletion NFET devices. In another embodiment, a reflection/overshoot sensor 60 is added. The output of sensor is connected to the body of a depletion PFET and an NFET. The feedback from sensor is such that the threshold voltage of the depletion devices are made more positive if the sensor detects that the output is being over-driven. A more positive threshold voltage will reduce the driver's IDS, but leaves the device in the linear mode.
    • 包括增强型PFET,耗尽型PFET,耗尽型NFET和增强型NFET的片外驱动电路。 大增强型PFET和大增强型NFET在三态关闭OCD并关闭OCD的未使用的一半以防止在驱动“0”或“1”时重叠电流。 第一栅极信号被施加到增强PFET的栅极,并且第二栅极信号被施加到增强NFET。 固定电压连接到耗尽型NFET的栅极,并连接到耗尽PFET的栅极。 从耗尽PFET和耗尽NFET器件之间的节点获得输出信号。 在另一个实施例中,添加了反射/过冲传感器60。 传感器的输出连接到耗尽PFET和NFET的主体。 来自传感器的反馈使得如果传感器检测到输出被过驱动,则耗尽装置的阈值电压变得更为正。 更正的阈值电压将减少驾驶员的IDS,但使设备处于线性模式。
    • 6. 发明授权
    • High performance direct coupled FET memory cell
    • 高性能直接耦合FET存储单元
    • US6137129A
    • 2000-10-24
    • US2825
    • 1998-01-05
    • Claude L. BertinJohn E. CroninErik L. HedbergJack A. Mandelman
    • Claude L. BertinJohn E. CroninErik L. HedbergJack A. Mandelman
    • H01L21/8244H01L27/11H01L27/108H01L29/74H01L29/76
    • H01L27/11Y10S257/903
    • A pair of directly coupled Field Effect transistors (FETs), a latch of directly coupled FETS, a Static Random Access Memory (SRAM) cell including a latch of directly coupled FETs and the process of forming the directly coupled FET structure, latch and SRAM cell. The vertical FETs, which may be both PFETs, NFETs or one of each, are epi-grown NPN or PNP stacks separated by a gate oxide, SiO.sub.2. Each device's gate is the source or drain of the other device of the pair. The preferred embodiment latch includes two such pairs of directly coupled vertical FETs connected together to form cross coupled invertors. A pass gate layer is bonded to one surface of a layer of preferred embodiment latches to form an array of preferred embodiment SRAM cells. The SRAM cell may include one or two pass gates. The preferred embodiment SRAM process has three major steps. First, preferred embodiment latches are formed in an oxide layer on a silicon wafer. Second, the cell pass gates are formed on a pass gate or Input/Output (I/O) layer. Third, the I/O layer is bonded to and connected to the preferred latch layer.
    • 一对直接耦合的场效应晶体管(FET),直接耦合FETS的锁存器,包括直接耦合FET的锁存器的静态随机存取存储器(SRAM)单元和形成直接耦合的FET结构的过程,锁存器和SRAM单元 。 可以是PFET,NFET或者其中之一的垂直FET是由栅极氧化物SiO 2分离的外延生长的NPN或PNP堆叠。 每个设备的门是该对的另一个设备的源或漏极。 优选实施例锁存器包括两对这样的直接耦合的垂直FET对,连接在一起以形成交叉耦合的反相器。 通路栅极层结合到优选实施例锁存器的一个表面上以形成优选实施例SRAM单元的阵列。 SRAM单元可以包括一个或两个传递门。 优选实施例SRAM过程具有三个主要步骤。 首先,优选实施例的锁存器形成在硅晶片上的氧化物层中。 第二,在传输门或输入/输出(I / O)层上形成单元传输门。 第三,I / O层被粘合并连接到优选的锁存层。