Title：High-speed comparator direct-current offset digital auxiliary self-calibration system and control method
Country：China
Patent No.：201310284696.0
Legal Status：Authorized
Inventor：Baoyong Chi, Yang Xu, Zhihua Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2013-07-08
Issue Date：2017-06-20
Abstract：
The invention discloses a high-speed comparator direct-current offset digital auxiliary self-calibration system and a control method. The system is formed by a configurable comparator comprising a compensation current source array, a self-calibration digital algorithm module and a time sequence signal generating circuit. The self-calibration digital algorithm module can generate two sets of digital signals in a symbolic coding mode according to output digits of the configurable comparator to control the opening and closing state of the compensation current source array, and thus the direct current offset voltage of the comparator can be calibrated to be within the adjustable precision range. The pre-amplifier stage bandwidth in the comparator can be configured so that power consumption under different sampling rates can be optimized.
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