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. https://cosmeticssquadets.shop/product-category/compression-sock/