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In this paper, an on-chip self-calibrated 8-bit R-2R digital-to-analog converter (DAC) based on digitally compensated input offset of the operational amplifier (OPAMP) is presented. To improve the overall DAC performance, a digital offset cancellation method was used to compensate deviations in the input offset voltage of the OPAMP caused by process variations. The whole DAC as well as offset compensation...
A new on-chip oscillation test strategy for analog and mixed-signal circuits is presented. In the proposed method, on-chip Schmitt trigger is used as the on-chip frequency reference to compensate the influence of process parameter variations. Furthermore, this solution also brings the possibility to implement Oscillation-based Built-In Self-Test (OBIST) for analog and mixed-signal integrated circuits...
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