Our group have rich research experience on ADC、DAC、BandGap. The achievements include decimation filter for oversampling ADC, oversampling ADC for single-chip 32-channel X-ray imaging system front end, filter for oversampling DAC based on 0.6um CMOS technology, oversampling ADC based on 0.18um CMOS technology, and 13bit 3M/s pipelined ADC.