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    • 95. 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。