Skewed Double Differential Pair Circuit for Offset Cancelllation
    13.
    发明申请
    Skewed Double Differential Pair Circuit for Offset Cancelllation 有权
    用于偏移消除的偏斜双差分电路

    公开(公告)号:US20090261882A1

    公开(公告)日:2009-10-22

    申请号:US12494642

    申请日:2009-06-30

    IPC分类号: H03L5/00

    摘要: A differential system producing differential signals with offset cancellation utilizing a double differential input pair system is disclosed. It uses two parallel differential transistor pairs which are intentionally skewed. Nominally, the differential pairs are skewed in opposite direction from each, but with equal magnitude, so that the combination of the two differential pairs is nominally balanced. The current through each differential pair is then increased or decreased until any offset is sufficiently cancelled, using a selection means for providing an equi-potential value to first and second differential inputs in a calibration mode of the system and a comparison means for comparing first and second differential outputs in a calibration mode to determine the offset of the system.

    摘要翻译: 公开了一种使用双差分输入对系统产生具有偏移消除的差分信号的差分系统。 它使用两个有意偏斜的并联差分晶体管对。 名义上,差分对在每个方向相反的方向上倾斜,但是具有相等的幅度,使得两个差分对的组合被名义上平衡。 然后,使用用于在系统的校准模式中为第一和第二差分输入提供等电位值的选择装置,增加或减少通过每个差分对的电流,直到任何偏移被充分抵消为止,以及用于比较第一和第 第二差分输出在校准模式下确定系统的偏移。

    Body-biased enhanced precision current mirror
    20.
    发明授权
    Body-biased enhanced precision current mirror 失效
    车身偏置增强型精密电流镜

    公开(公告)号:US07501880B2

    公开(公告)日:2009-03-10

    申请号:US10906628

    申请日:2005-02-28

    IPC分类号: G05F1/10

    CPC分类号: G05F3/262

    摘要: A body-biased enhanced current mirror circuit is disclosed wherein the body voltage of a current mirror device is adjusted to compensate for the effect of changes in the output voltage on the output current, increasing the output impedance. For each instance of the current mirror, this approach has the advantage of requiring no additional margin in operating voltage and of consuming no more circuit area than prior art current mirror designs. In addition, the body-biased enhanced current mirror circuit provides a stable reference current to output current ratio over a wide operating range. An auxiliary MOSFET current mirror device with the body connected to ground may be added in parallel with the body-biased current mirror device to eliminate a non-monotonicity of the current output.

    摘要翻译: 公开了体偏置增强电流镜电路,其中调整电流镜装置的体电压以补偿输出电压对输出电流的变化的影响,增加输出阻抗。 对于电流镜的每个实例,这种方法的优点在于不需要额外的工作电压余量,并且消耗的电路面积比现有技术的电流镜设计更多。 此外,体偏置增强电流镜电路在宽的工作范围内提供稳定的参考电流至输出电流比。 可以将主体连接到地的辅助MOSFET电流镜装置与主体偏置电流镜装置并联,以消除电流输出的非单调性。