HIGH RESOLUTION OUTPUT DRIVER

专利名称：HIGH RESOLUTION OUTPUT DRIVER发明人：AMIRKHANY, AMIR,HUANG,

CHAOFENG,KAVIANI, KAMBIZ,DETTLOFF,WAYNE, D.,CHANG, KUN-YUNG

申请号：EP10816291申请日：20100914公开号：EP2478637A4公开日：20150318

摘要：High resolution output drivers having a relatively small number of sub-driverbranches or slices each having nominal impedances substantially larger than a

quantization step and that incrementally differ from one another by an impedance stepsubstantially smaller than a quantization step. In one implementation, such \"differential\"or \"non-uniform\" sub-driver slices implement respective elements of an n choose kequalizer, with each such differential sub-driver slice being implemented by a uniform-element impedance calibration DAC. In another implementation, each component of auniform-slice equalizer is implemented by a differential-slice impedance calibration DAC,and in yet another implementation, each component of a differential-slice equalizer isimplemented by a differential-slice impedance calibration DAC. In an additional set ofimplementations, equalization and impedance calibration functions are implementedbilaterally in respective parallel sets of driver branches, rather than in the nested \"DACwithin a DAC\" arrangement of the hierarchical implementations. Through such bilateralarrangement, multiplication of the equalizer and calibrator quantizations is avoided,thereby lowering the total number of sub-driver slices required to meet the specified

ranges and resolutions.

申请人：RAMBUS INC.

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